iosr-JMCE   International Conference on Recent Innovations in Civil & Mechanical Engineering [i- CAM2K16]

Paper Type	:	Research Paper
Title	:	Theoretical and Experimental Analysis of FRP Composite Bolted Joint for Rocket Motors
Country	:	India
Authors	:	Mr. Kondru Nagendra Babu || Dr. G. Srinivasa Gupta

Abstract: This investigation deals with composite plates joined with bolts under tensile loading. A Fiber reinforced composite laminates made of E-glass fiber with phenolic resin as matrix material was fabricated using standard hand layup techniques and joined together using bolts and nuts. The objective of the work is to design bolted joint for rocket motor casing by using Standard method. Testing was done according to ASTM D5961: Procedure 'B' – the standard test for bearing response of single shear two piece polymer matrix composite laminate. It also includes the manufacturing of composite laminates by studying the properties of E-glass and phenolic resin to enhance the properties by adding..........

Keywords – bolted joint, CATIA V5, ANSYS 15,E-glass, phenolic resin

[1]. Sayed A. Nassar, Vinayshankar L.Virupaksha, Saravanan Ganeshmurthy, "Effect of Bolt Tightness on the Behaviour of composite joints", Journal of Fastening and Joining Research Institute, Department of Mechanical Engineering, Oakland University, Vol. 129, FEBRUARY 2007, pp.
[2]. Yanyao Jiang, Ming Zhang, Chu-Hwa Lee, "A Study of Early Stage Self-Loosening of Bolted Joints" Journal of Mechanical Engineering, University of Nevada,SEPTEMBER 2003, Vol. 125,pp.
[3]. P.S. Parameswaran, "Modification of Phenol Formaldehyde Resin for Improved Mechanical Properties", PhD Thesis from Cochin University of Science andf Technology, 10606/8942, May 2013, pp. 02-46.
[4]. ASTM D 792 - Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement.
[5]. ASTM D883 - Terminology Relating to Plastics

Paper Type	:	Research Paper
Title	:	Thermal Radiation and Heat Transfer Effects on MHD Micro polar Fluid Flow Past a Vertical Plate with Chemical Reaction
Country	:	India
Authors	:	K.BhagyaLakshmi || P.V.Satya Narayana || N.V.R.V.Prasad

Abstract: We examine the instantaneous effects of chemical reaction and radiation absorption on unsteady MHD free convective heat and mass transfer flow for a micro polar fluid bounded by a semi infinite vertical plate in the presence of heat generation and thermal radiation. The plate is assumed to move with a constant velocity in the direction of fluid flow. A uniform magnetic field acts perpendicular to the porous surface in which absorbs micro polar fluid with a suction velocity varying with time.............

Keyword--- Chemical reaction, heat transfer, micro polar fluid, MHD, thermal radiation

[1]. Eringen A.C. Theory of micropolar fluids, J.Math.Mech.Vol 16 (1966) pp.1-18.
[2]. Eringen A.C., J.Math.Anal.Appl.Vol 38(1972) pp 480-496.
[3]. R.C.Sharma, U.Gupta, Thermal Convection in micropolar fluids in porous medium, Int.J.Eng.Sci.33 (1995) 1887-1892.
[4]. J. Pratap kumar, J.C.Umavathi, J.Chamkha Ali, I.Pop, Fully developed free convective flow of micropolar and viscous fluids in a vertical channel, Applied Mathematical Modeling, 34 (2010) 1175-1186.
[5]. P.Muthu, B.V.Rathish Kumar, Peeyush Chandra, Peristalic motion of micropolar fluid in circular cylindrical tubes: Effect of wall properties, Applied Mathematical Modelling, 32(2008) 2019-2033

Paper Type	:	Research Paper
Title	:	Fatigue analysis and life predictions of Forged steel and Powder Metal connecting rods
Country	:	India
Authors	:	Guduri Tirupati Reddy || Chidurala Srinivas

Abstract: The report investigates on fatigue behavior of forged steel connecting rods. They must be capable of transmitting axial tension and compression loads. Altair Hyper works software is used for applying tension and compression loads, Altair Hyper mesh for preprocessing, Altair Radioss for solving tension and compression analysis at the same time fatigue analysis for checking the life of the material based on tension and compression condition are solved. Conclusion is based on the result of material life. Modeling incorporated three-dimensional geometry, tension and compression loading, and symmetry conditions. 3-D model geometry was developed in CATIA V5R19. These analyses were performed iteratively at different element lengths until the solution obtained appropriate accuracy. Convergence of stresses were observed, as the mesh size was successively refined. The element size of 1.27 mm was finally considered. The result obtained were discussed and reported.

Keywords: forged steel, connecting rods Altair Hyper works element size.

1] Araki, S., Satoh, T., and Takahara, H., Application of powder forging to automotive connecting rods, Kobelco Technology Review, 16, 1993, 20-24.
[2] ASTM Standard E83-96, Standard practice for verification and classification of extensometers, Annual Book of ASTM Standards, 03.01, 198-206,1997.
[3] ASTM Standard E606-92, Standard practice for strain-controlled fatigue testing, Annual Book of ASTM Standards, 03.01, 523-537,1997.
[4] ASTM Standard E1012-93a, Standard practice for verification of specimen alignment under tensile loading, Annual Book of ASTM Standards, 03.01,699-706,1997.
[5] ASTM Standard E8-96a, Standard test methods for tension testing of metallic materials, Annual Book of ASTM Standards, 03.01, 56-76,1997.

Paper Type	:	Research Paper
Title	:	Examination of covered amalgamated Leaf Spiral
Country	:	Ethiopia
Authors	:	Samson yohannes || B.K.Rao

Abstract: In the present paper, weight reduction is the main criteria in automobile industries. The Leaf Spiral is one of the potential item for weight reduction in automobile as it accounts for ten to twenty percent of the unstrung weight. The automotive industries are showing keen interest in replacing of steel spring with composite Leaf Spiral due to high strength to weight ratio. This helps in achieving the vehicle with improved riding qualities. In the present work an attempt is made to replace the existing mono steel Leaf Spiral of passenger vehicle with amalgamated composite Leaf Spiral. The dimension of a amalgamated composite Leaf Spiral is considered same as that of existing steel spring..........

Keywords - Analysis1,Composite2,Material3 ,stress4,weight5

[1]. Sri Harsha et al done static analysis of steel leaf spring and laminated composite multi leaf spring using carbon fibre reinforced polymer.
[2]. Patunkar et al made comparative analysis of conventional steel leaf spring with a virtual model of a composite leaf spring under static load condition.

[3]. GulurSiddaramanna et al made general study on design and analysis of a low cost fabrication of complete mono composite leaf spring and mono composite leaf spring with bonded end joints.

Paper Type	:	Research Paper
Title	:	Supersonic Flow Analysis and Evaluation of Damping derivative
Country	:	Malaysia
Authors	:	Renita Sharon Monis || Aysha Shabana || Asha Crasta || S.A.Khan

Abstract: The emphasis of this paper is to examine the variation of damping derivative with incidence angle and Mach number with varying pivot position. The damping derivative decreases with Mach number and increases with the incidence angle. It is also seen that for a given Mach number the damping derivatives are decreasing and reaches a minimum value and then again increases and attains the same value which was at h = 0, for pivot position h = 0 to h = 1.0 and at h = 0.5 it attains a minima and increases for h = 0.6 to h = 1. The Damping derivative decreases with Mach number for the varying pivot position...........

Keywords: Damping derivative, pivot position, Stability derivative, Supersonic flow.

[1]. Ghosh, K. (1977), "A New Similitude for Aerofoils in Hypersonic Flow", Proceedings of the 6th Canadian Congress of Applied Mechanics, Vancouver, Canada, May 29-June 3, pp. 685-686.
[2]. Ghosh K.,and Mistry B.K. (1980), "Large incidence Hypersonic Similitude and Oscillating Non-planar Wedges", AIAA Journal, Vol.18, Number 8, Aug. pp. 1004-1006.
[3]. Ghosh, K. (1984), "Hypersonic Large Deflection Similitude for Quasi wedges and Quasi-cones", Aeronautical Journal, March, pp. 70-76.
[4]. Asha Crasta and S. A. Khan, "High Incidence Supersonic similitude for Planar wedge",International Journal of Engineering research and Applications, Vol.2, Issue 5, September-October 2012, pp. 468-471.
[5]. Asha Crasta and S. A. Khan, "Estimation of Stability derivatives of an Oscillating Hypersonic delta wings with curved leading edges",IJMET, Vol.3, Issue 3, December 2012, pp. 483-492

Paper Type	:	Research Paper
Title	:	Effect of Alkali Treatment on Mechanical Properties of Agave Fibre Reinforced Polymer Composites
Country	:	India
Authors	:	Pradeep Kumar J || A.Sugunakar || Chetty.Nagaraj

Abstract: The present work study flexural and tensile behavior of short AGAVE fiber reinforced composites. The fibers are chemically treated in 10% NaOH solution at room temperature. Short fibers of 7mm ,10mm and 12 mm are used in the present work. The composite lamina is prepared by hand molding using isopthalic polyester resin. Flexural test and tension tests are carried out as per ASTM standards. The flexural strength and tensile strength of composite lamina are evaluated. The Effect of Fiber surface Treatment on flexural and tensile properties are observed. Surface modification of the fibre by alkali treatment improves the chemical bonding and tensile strength. An interact between fiber and matrix was observed from the SEM (scanning electron microscope) micrographs.

Keywords: Natural fibres, Agave, reinforced polymer, tensile test, hand layup technique.

[1]. A. K. Bledzki and J. Gassan, "Composites Reinforced with Cellulose Based Fibres," Progress in Polymer Sci-ence, Vol. 24, No. 2, 1999, pp. 221-274.
[2]. P. J. Herrara-Franco and A. Valadez-Gonzalez, "Me-chanical Properties of Continuous Natural Fibre-Rein- forced Polymer Composites," Composites Part A: Applied Science and Manufacturing, Vol. 35, No. 3, 2004, pp. 339-345.
[3]. Jayaramudu J., Obi Reddy K., Uma Maheswari C., Jeevan Prasad Reddy D., VardaRajulu A., Journal of Reinforced Plastics and Composites 28 (2009) 2177-2181.
[4]. Ashok Kumar, M., Ramachandra Reddy, G., Hemachandra Reddy K., Venkata Mohana Reddy Y., Ranga Reddy P., Subbarami Reddy N., Indian Journal of Material Science 23 (2011) 345-250.
[5]. Jindal R , Kaith BS, Mittal H, and Sharma R, Advances in Applied Science Research, 2 (2):19-27 (2011).

Paper Type	:	Research Paper
Title	:	Investigation on Performance of Shell and Tube Heat Exchanger with Assorted Baffle Parameters
Country	:	India
Authors	:	Levicus John || Khasim Sharif Sk || D.Jagadish || K. Phaneendra Kumar

Abstract: Shell and Tube heat exchangers (STHXs) are extensively used in the ever growing process industry requirements. With the advancement in the technology used in the STHXs we have seen a tremendous use of the helical baffles to improve the heat transfer performance. From varying angles to sizes and shapes of the helical baffles our priority is mainly to compare and study the performance improvements from segmental baffles to helical baffles. In this paper an experimental setup has been made for both Shell and Tube heat exchangers with segmental baffles (STHXsSB) and Shell and Tube Heat exchangers with Helical Baffles (STHXsHB). The helical baffles used here are discontinuous-helical baffles. The widely used Bell-Delaware method is used to validate the experimental data.

Keywords -Baffles, Blade Angle, Heat exchanger, helical baffles, pressure drop

[1]. Master, B. I., Chunangad, K. S., and Pushpanathan, V., 2003, ―Fouling MitigationUsing Helixchanger Heat Exchangers,‖ Proceedings of the ECI Conferenceon Heat Exchanger Fouling and Cleaning: Fundamentals and Applications,Santa Fe, NM, May 18–22, pp. 317–322.
[2]. Bell, K. J., 1981, ―Delaware Method for Shell Side Design,‖ Heat ExchangersThermal Hydraulic Fundamentals and Design, S. Kakac, A. E. Bergles, and F.
[3]. Mayinger, eds., Taylor & Francis, Washington, DC.
[4]. Bell, K. J., 1986, ―Delaware Method of Shell Side Design,‖ Heat ExchangerSourcebook, J. W. Pallen, ed., Hemisphere, Washington, DC.
[5]. Bell, K. J., 1988, ―Delaware Method of Shell-Side Design,‖ Heat TransferEquipment Design, R. K. Shah, E. C. Sunnarao, and R. A. Mashelkar, eds.,Taylor & Francis, New York

Paper Type	:	Research Paper
Title	:	Diesel Particulate Filter Modeling For Compression Ignition Engine
Country	:	India
Authors	:	Khasim Sharif. SK || D.Jagadish || K. Phaneendra Kumar || K. Rakesh

Abstract: Diesel particulate filters capture particle emissions through a combination of filtration mechanisms, such as diffusion deposition, inertial deposition, or flow-line interception. Collected particulates are removed from the filter, continuously or periodically, through thermal regeneration. Diesel filters are highly effective in controlling solid particulate emissions—including solid particle numbers—but may be ineffective in controlling liquid fractions of PM emission. Filters were first commercialized as retrofit devices, followed by a wide scale adoption on new light-duty and heavy-duty diesel engines in both highway and non road applications
Keywords: CPSI, DPF, HSU, MECA, PM

[1]. Engine Emissions by B.P.Pundir.
[2]. Y. Uchida, S. Ichikawa, T. Harada. Durability Study on Si-Sic Material for DPF[C]. SAE Paper 2003-01-0384.
[3]. M. Harada, S. Ichikawa, A. Otsuka, et al. Durability Study on Si-SiC Material for DPF (3)[C]. SAE Paper 2005-01-0582, 2005.
[4]. 4.Cheng Li, Frank Mao, Reggie Zhan, et al. Durability Performance of Advanced Ceramic Material DPFs[C].SAE Paper 2007-01-0918, 2007.
[5]. SaurabhMathur, John H. Johnson, Jeffrey D. Naber, et al. Experimental Studies of an Advanced Ceramic Diesel Particulate Filter[C]. SAE Paper 2008-01-0622, 2008.

Paper Type	:	Research Paper
Title	:	Analysis of Single Vendor – Multi Buyer Consignment Inventory
Country	:	India
Authors	:	Chidurala Srinivas || A. Raji Reddy

Abstract: Some significant strategies or practices for streamlining inventory along the supply chain include Consignment models. This paper describes the benefits of Consignment Policy inventory models of single vendor – multi buyer model which is view as a classification of divergent supply chain with end to multi end case which is a distinctive flavor of Vendor Managed Inventory. The change of ownership commences during pull system at which the payment is made to vendor. It evaluates minimum joint total expected cost of vendor and buyer, simultaneously optimise quantitative decision variables. Numerical examples are presented to illustrate the benefit of the proposed strategies and the effects of changes on the cost and parameters are studied.

Keywords: Consignment Policy, Delay delivery, Information sharing

[1] M.Braglia, LE.Zavanella, Modeling an industrial for inventory management in supply chains: the consignment stock
case, International Journal of Production Research, 41(16), 3793-3808, 2003.
[2] G.Valentini, L.E.Zavanella, The consignment stock of inventories: industrial case and performance analysis,
International Journal of Production Economics, 81-82, 215-224, 2003.
[3] Z.Simone, R.W.Grubbstrom, A note on an industrial strategy for stock management in supply chains: modeling and
performance evaluation, International Journal of Production Research, 42(20),4421-4426,2004.
[4] S.K.Goyal, A joint economic lot size model for purchaser and vendor: a comment, Decision Science, 19(1), 236-
241,1988.
[5] A.Banerjee, A joint economic lot size model for purchaser and vendor, Decision Sciences, 17, 292- 311, 1986.

Paper Type	:	Research Paper
Title	:	Cold-Pressed Jute Fibre Composite Tensile Properties Effect on Hygrothermal Treatment
Country	:	India
Authors	:	Nagaraj || Khasim Sharif Sk || D.Jagadish || K. Phaneendra

Abstract: The growing environment awareness demands the use of nature fibres as reinforcement materials in commercial. The natural fibres however are hydrophilic in nature and their composites undergo environmental degradation during service, hydrothermal conditioning on as received jute fabric at different temperatures of cold press has been studied in the present investigation. These composites are usually subjected to various loading conditions. Therefore, an attempt has been made to study the tensile properties of the composites. Fractography studies were carried out to study the fracture surface. It is noticed that the major mode of failure is due to fiber pullout and matrix cracking. The result from the hydrothermal studies shows the decrease in strength values of the composites on prolong exposure to humid

Keywords: Cashew nut shell, Cold pressed jute, hydrothermal treatment, Silica sand

[1]. Li XH, Meng YZ, Wang SJ, Rajulu AV, Tjong SC. "Completely biodegradable composites of poly (propylene carbonate) and short, lignocellulose fabric hildegardia populifolia." JPolym Sci: Part B; Volume 42, (2004): p. 666–675.
[2]. Shibata M, Takachiyo K, Ozawa K, Yosomiya R, Takeishi H. "Biodegradable polyester composites reinforced with short abaca fiber." J Appl Polym Sci; Volume 85, (2002): p. 129–138.
[3]. Iannace S, Nocilla G, Nicolais L. "Biocomposites based on sea algae fibers and biodegradable thermoplastic matrices." J Appl Polym Sci; Volume 73, (1999): p. 583–92.
[4]. Shibata M, Ozawa K, Teramoto N, Yosomiya R, Takeishi H. "Biocomposites made from short abaca fiber and biodegradable polyester." Macromol Mater Eng; Volume 288, (2003): p. 35–43.
[5]. Luo S, Netravali A.N., "Interfacial and mechanical properties of environment-friendly"green‟ composites made from pineapple fibers and poly (hydyoxybutyrate-co-valerate) resin." J Mater Sci; Volume 34, (1999): p. 3709–3719.

Paper Type	:	Research Paper
Title	:	Control of Exhaust Emissions in Four Stroke Compression Ignition Engine by Using Piston Coatings with Diesel Blends
Country	:	India
Authors	:	A.V.N.S. Kiran || Sadu Venkatesu || N. Venkatachalapathi

Abstract: The experimental investigations on four stroke single cylinder compression ignition engine is to reduce the exhaust emissions by using unleaded diesel and alcohol blends on the CI engine with 25% ethanol, 25% beutanol, 25% proponol and 75% diesel used to control carbon mono oxide (CO) and UN burnt hydro carbons (UBHC)& Nitrous Oxide (NOx) . These pollutants are hazardous to the nature and cause health problems to the human beings and impact on the environment. The copper coated piston (CCP) of 300μ of thickness is coated on the piston crown................
Keywords: BP : Base Piston, CCP: Copper Coated Piston, Set-1: 25% Ethanol+75% Diesel Set2: 25% Beutanol+ 75% Diesel, Set3: 25% Proponol+ 75% Diesel

[1]. S.NARASIMHA KUMAR: "experimental investigation of two stroke copper coated spark ignition engine with gasoline and gasohol" international journal of emerging science and engineering (ijese) issn: 2319–6378, volume-2, issue-5, march 2014.
[2]. T.O. WAGNER, D.S. GRAY, B.Y. ZARAH, A.A. KOZINSKI , practicality of alcohols as motor fuel, SAETecnical paper 790429 (1979) 1591-1607.
[3]. MURTHY, P.V.K., NARASIMHA KUMAR, S., MURALI KRISHNA, M.V.S., SESHAGIRI RAO, V.V.R. AND. REDDY, D.N., Aldehyde emissions from two- stroke and four-stroke spark ignition engines with methanol blended gasoline with catalytic converter, International Journal of Eng. Research and Tech., 3(3),793.802 , 2010.
[4]. VIRAL K PANDYA, SHAILESH N CHAUDHARY, BAKUL T PATEL, PARTH D PATEL: "experimental study on the effect of methanol - gasoline, ethanol-gasoline and n- butane gasoline blends on the performance of 2-stroke petrol engine" International Journal of Advances in Engineering & Technology, Nov 2011.©IJAET ISSN: 2231-1963

Paper Type	:	Research Paper
Title	:	Effect of Inertia Level on Aerodynamic Derivatives of a wedge in Hypersonic Flow
Country	:	Malaysia
Authors	:	Pavitra S. || Lavanya S. || S. A. Khan

Abstract: In this paper a 2-dimensional slender bodies in hypersonic flow at high angle of attack with different Mach number has been implemented. By utilizing the concept of a piston moving in a cylinder at any speed, relations for stability derivatives are obtained for a wedge, which depends on the flight Mach number and semi vertex angle of the wedge. Stiffness derivatives decreases linearly with the increase in the Mach number for h = 0, 0.2, 0.4 but for Mach number 10 and above the steady state is achieved and stability derivative becomes independent of Mach number.......

Keywords: Angle of attack, Mach number, Stability derivatives.

[1] Tsien, H. S., Similarity laws of hypersonic flow, Journal of Mathematical Physics, 25, 1946, 247-251.
[2] Hayes, W.D. and Probstein, R.F, Viscous Hypersonic similitude, Jr. Aerospace science,.26., 1959, 815-825.
[3] Sychev, V. V, Three Dimensional Hypersonic Gas Flow Past Slender Bodies at High Angles of Attack, Journal of Applied
Mathematics and Mechanics, 24, 1960, 296-306.
[4] Lighthill, M. J., Oscillating airfoil at high Mach numbers, Journal of Aeronautical Sciences, 20, 1953, 402-406.
[5] Asha Crasta, M. Ahmed Ali Baig, S. A. Khan , 2012, 'Estimation of Stability derivatives of a Delta wing in Hypersonic
flow', International Journal of Emerging trends in Engineering and Developments , Vol. 6, Issue2, Sep., pp. 505-516.

Paper Type	:	Research Paper
Title	:	Control of Suddenly Expanded Flows from Correctly Expanded and under Expanded Nozzlesat Supersonic Mach number for Area Ratio 2.56
Country	:	Malaysia
Authors	:	Musavir Bashir || M. Ahmed Ali Baig || Ahmad Faris Ismail || S. A. Khan

Abstract: Airflow from convergent-divergent axisymmetric nozzles expanded into circular duct of higher area were studied experimentally, with the main focus on the flow development in the duct. The flow parameters considered in this investigation are the Mach number at the nozzle exit and the level of expansion. The geometrical parameters considered are the area ratio and the L/D ratio of the duct. To control on the flow field developed in the duct, four tiny jets of 0.5 mm radius located at 900intervals at 6.5 mm radius from the centre of the nozzle exit were employed as the flow regulators..........

[1]. Wick, R.S., The effect of boundary layer on sonic flow through an abrupt cross-sectional area change. Journal of the Aeronautical Sciences, 2012.
[2]. Hoerner, S.F., Base drag and thick trailing edges. Journal of the Aeronautical Sciences, 2012.
[3]. Badrinarayanan, M., An experimental investigation of base flows at supersonic speeds. The Aeronautical Journal, 1961. 65(607): p. 475-482.
[4]. Ackeret, J., Aspects of internal flow. Fluid Mechanics of Internal Flow, 1967: p. 1-24.
[5]. Rathakrishnan, E. and A. Sreekanth. Flows in pipes with sudden enlargement. in 14th Space Technology and Science Symposium. 1984.

Paper Type	:	Research Paper
Title	:	Control of Ideally Expanded and under Expanded Nozzle Flows with Micro Jets
Country	:	India
Authors	:	Fharukh Ahmed G M || M. Ahmed Ali Baig || Musavir Bashir || S. A. Khan

Abstract: This paper presents an experimental investigation of an airflow from convergent-divergent axisymmetric nozzles expanded suddenly into circular duct of larger cross-sectional area than that of nozzle exit area, focusing attention on the base pressure and the flow development in the duct. To investigate the influence of active control on wall pressure as well as on the flow field developed in the duct, the micro jets of 1 mm orifice diameter located at 900 interval along a pitch circle diameter 1.3 times the nozzle exit diameter were employed as the controller of the base pressure. The Mach number investigated in the present study was 1.30. The area ratio of the present study was 2.56...............

[1]. Lefrancois, E., G. Dhatt, and D. Vandromme, Fluid–structural interaction with application to rocket engines. International journal for numerical methods in fluids, 1999. 30(7): p. 865-895.
[2]. Blades, E.L., E.A. Luke, and J. Ruf, Fully Coupled Fluid-Structure Interaction Simulations of Rocket Engine Side Loads. AIAA paper, 2012. 3969.
[3]. Brown, A.M., et al. Characterization of side load phenomena using measurement of fluid/structure interaction. in 38th Joint Propulsion Conference and Exhibit, AIAA Paper. 2002.

Paper Type	:	Research Paper
Title	:	Active Control of Wall Pressure Flow Field at Low Supersonic Mach Numbers
Country	:	Malaysia
Authors	:	Mohammed Asad Ullah || Musavir Bashir || Ayub Janvekar || S. A. Khan

Abstract: This paper presents an experimental study of airflow from convergent-divergent nozzles discharged into enlarged duct, focusing attention on the flow development in the duct. To investigate the influence of active control on the flow field developed in the duct, the micro jets of 0.05 mm radius orifice placed at 900 interval along the base at 6.5 mm from the main jet were employed. The Mach number of this study was 1.3. The area ratio of the present study was 2.56. The NPR presented are from 3, 5, 7, 9, and 11 respectively. The L/D ratio of the duct was varied from 10 to 1..............

[1]. Wick, R.S., The effect of boundary layer on sonic flow through an abrupt cross-sectional area change. Journal of the Aeronautical Sciences, 2012.
[2]. Crocco, L., A mixing theory for the interaction between dissipative flows and nearly isentropic streams. Journal of the Aeronautical Sciences, 2012.
[3]. Chapman, D.R., An analysis of base pressure at supersonic velocities and comparison with experiment. 1951.
[4]. Kurzweg, H., Interrelationship between boundary layer and base pressure. Journal of the Aeronautical Sciences, 2012.
[5]. Hoerner, S.F., Base drag and thick trailing edges. Journal of the Aeronautical Sciences, 2012.

Paper Type	:	Research Paper
Title	:	Control of Wall Pressure Flow Field with Micro Jets and Control Effectiveness
Country	:	Malaysia
Authors	:	Musavir Bahir || Qummare Azam || S. A. Khan || M. Ahmed Ali Baig

Abstract: This paper presents an experimental study of airflow from convergent-divergentnozzles discharged into enlarged duct, focusing attention on the flow development in the duct. To investigate the influence of active control on the flow field developed in the duct, the tiny jets of 0.05 mmradiuslocated at 900interval along the base at 6.5 mm from the main jet were employed. The Mach number tested in the present study was 1.48. The area ratio tested was 2.56. The NPR tested are from 3, 5, 7, and 9 respectively. The L/D ratio of the duct was varied from 10 to 1. The level of expansion at the nozzle exit influences the wall pressure very strongly. When the micro jets were activated they found to influence the base region, taking the wall pressure to considerably higher values, for most of the cases. Flow field in the duct with and without control remains the same.

[1]. Schmidt, S., et al., Advanced ceramic matrix composite materials for current and future propulsion technology applications. Acta Astronautica, 2004. 55(3): p. 409-420.
[2]. Eilers, S.D., et al., Side-Force Amplification on an Aerodynamically Thrust-Vectored Aerospike Nozzle. Journal of Propulsion and Power, 2012. 28(4): p. 811-819.
[3]. Gad-el-Hak, M., Flow control. Applied Mechanics Reviews, 1989. 42(10): p. 261-293.
[4]. You, D. and P. Moin, Active control of flow separation over an airfoil using synthetic jets. Journal of Fluids and Structures, 2008. 24(8): p. 1349-1357.
[5]. Uzun, A., et al., Flow physics of a pulsed microjet actuator for high-speed flow control. AIAA Journal, 2013. 51(12): p. 2894-2918.

Paper Type	:	Research Paper
Title	:	Effect of Laser Intensities on Additive Manufacturing Process - A Review
Country	:	India
Authors	:	MR. D. DEV SINGH || DR. A. RAJI REDDY

Abstract: Design and manufacture of critical components has become an important process and still posing problems towards the desired quality. The critical components can be used in applications of navol, aerospace, biomedical and other applications. Additive manufacturing is an economical and simple process for manufacturing of such complex and intrinsic components. Rapid Prototyping or Additive Manufacturing is defined as conversion of 3D CAD models into physical objects. Rapid Prototyping can be defined as used to generate non-structural and non-functional demo pieces or batch of one component for proof of concept. Whereas Additive Manufacturing is used as a real, scalable manufacturing process, to generate fully functional final components with high-tech materials for low batch, high-value manufacturing............

Keywords -Additive manufacturing, Design and characterization, Rapid prototyping, Ti and Al alloy.

[1] Z Zhou, D Li, J Zeng and Z Zhang, Rapid fabrication of metal-coated composite stereolithography parts, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture (2007), Vol. 221, pp.1431-1440.
[2] Chandrasekhar. U, Venkatesh. K, Elangovan. K, Rangaswamy. T, Integrated Use of Rapid Prototyping and Metal Plating Techniques For Development of Micro Air Vehicles, International Journal of Engineering Science and Technology, 3(1), 2011, pp:188-193.
[3] Methuen V. Kulkarni., K. Elangovan., and K. Hemachandra Reddy. (2012) "Development Of Electroplating Setup For Plating ABS Plastics‟, i-manager‟s Journal on Mechanical Engineering, Vol. 2 No. 3, pp. 52-57.
[4] Wu H., Sun, D., Zhou, Z., 2004, "Micro Air Vehicle: Configuration, Analysis, Fabrication and Test", IEEE/ASME Transactions on Mechatronics, vol. 9, no. 1, p. 108-117.
[5] Paul Marks., 2011, 3D printing has been extensively developed the World‟s First Printed Plane". New Scientist, August 2011.

Paper Type	:	Research Paper
Title	:	Experimental Study and Identification of Optimal Cutting Parameters on Cutting Forces in Turning Using Taguchi Based Fuzzy Logic
Country	:	India
Authors	:	Y.Poornachandra Sekhar || S.M.Saleemuddin || P. Meramma

Abstract: The cutting forces generated in turning are mainly influenced by speed, feed, depth of cut and tool geometry. The study of cutting forces for changes in tool geometry and feed rate using Taguchi Method and Fuzzy Logic is presented in this paper. Design of Experiments (DOE) helped in reducing the number of experiments to be performed. For an L16 orthogonal array DOE at different feed rates the turning experiments are performed on Aluminum rod with the HSS cutting tools by varying the tools of different rake angles at different approach angles and the values of responses (cutting forces) are tabulated. The analysis of the influence of feed rate and tool geometry on cutting forces is carried out by Taguchi and ANOVA methods..........

Keywords -Taguchi method; tool geometry, cutting forces, feed rate, Analysis of variance, fuzzy inference system;

[1]. Nicoleta LUNGU, Marian BORZAN, "Effect of cutting speed and feed rate on tool geometry, Temperature and cutting forces in machining AISI 1045 carbon steel Using fem simulation", Proceedings in Manufacturing Systems, Volume 7, Issue 4, pp 245-252, 2012.
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[4]. HacıSağlam, "Analysis of the influences of feed rate and tool geometry on cutting forces using regression analysis and fuzzy logic in turning", Journal of Technical-Online, Vol; 10, Issue 2, 136-155, 2011.

Paper Type	:	Research Paper
Title	:	Optimization of Process Parameters of Plasma Arc Cutting Using Taguchi's Robust Design Methodology
Country	:	India
Authors	:	Dr.S.V.S.S.Srinivasa Raju || K.Kodanda Ram || D.V.S.S. Satyanarayana || M.Sai Nishood Goud

Abstract: One of the most important nonconventional machining methods is Plasma Arc Machining. Its high accuracy, high finishing, ability of machining any hard materials and to produce intricate shapes increased its demand in the market. It is cheaper than Laser cutting and about ten times faster than Oxy-fuel Cutting and hence is a better option for cutting many jobs. In this work the process parameters that influence the quality of cut in terms of the bevel angle have been analyzed statistically for cutting Mild Steel E350 grade sheets. The Current, Cutting Speed and Arc Gap have been considered as the important parameters. Taguchi Design of Experiments was used and analysis was done by Minitab 17 software...............

Keywords - Mild Steel E350 material ,Orthogonal Array ,Plasma Cutting , Surface Plot and Taguchi Method.

[1]. Amit Sharma, Optimization of Kerf Quality Using Robust Design of Experiments During Nd: YAG Laser Cutting of Thin Aluminum Alloy Sheet for Straight Profile, MIT International Journal of Mechanical Engineering, Vol. 1, No. 1, 2011, 1-8(8) ISSN No. 2230 – 7699.
[2]. R. Bhuvenesh, M. H. Norizaman and M. S. Abdul Manan, Surface Roughness and MRR Effect on Manual Plasma Arc Cutting Machining, International Scholarly and Scientific Research & Innovation, Vol. 6, 2012.
[3]. Joseph C. Chen and Ye Li, Taguchi Based Six Sigma Approach to Optimize Plasma Arc Cutting Process: an Industrial Case Study, International Journal of Advanced Manufacturing Technology, 41, 760-769(10).