iosr-JMCE   Volume-19 ~ Issue-2 ~ Mar. – Apr. 2022

Abstract: The hazardous effects of pollutants from conventional fuel vehicles have caused the scientific world to move towards environmentally friendly energy sources. Though we have various renewable energy sources, the perfect one to use as an energy source for vehicles is hydrogen. Like electricity, hydrogen is an energy carrier that has the ability to deliver incredible amounts of energy. Onboard hydrogen storage in vehicles is an important factor that should be considered when designing fuel cell vehicles. In this study, a recent development in hydrogen fuel cell engines is reviewed to scrutinize the feasibility of using hydrogen as a major fuel in transportation systems. A fuel cell........

Key words: Renewable energy source; hybrid car; specific heat ratio;stoichiometric mixture;, gasification.

[1]. Gillingham.K (2007) Hydrogen Internal Combustion Engine Vehicles: A Prudent intermediate step or a step in wrong direction? Stanford global climate and energy project working paper.
[2]. Neiva,l.s,gama,l , A study on the characteristics of the Reforming of Methane; A review, Brazil journal of Petroleum and Gas,V.4n.3,P.119-127,(2010),ISSN 1982-0593.
[3]. Brian D. James Overview of Hydrogen Storage Technologies, Argonne National Laboratory.
[4]. VVN Bhaskar* et.al/International Journal of Innovative Technology and Research, Vol. 1, Issue 1, Dec-Jan (2013),046-053

Abstract: Flow-forming is an echo friendly, chip less metal forming process. A single roller flow forming machine has been used to manufacture the thin walled tubes of AA6082 alloy. The effect of process parameters on the surface finish of flow formed tubes have been studied by Taguchi method. The main flow-forming parameters selected for the present investigation are axial feed of the roller, speed of the mandrel, and thickness reduction. The effects of these input parameters on the response, surface roughness (Ra) have been critically analyzed. It has been found that the axial feed of the roller and speed of the mandrel are the most important process parameters influencing the surface roughness of flow formed tube. A finish of 1.10 μm is produced by flow forming process when the process parameters were set at their optimum values.

Key Words: Flow-forming, AA6082 alloy, DOE, Surface finish

[1]. Ram Mohan T and Mishra R, Studies on the power spinning of tubes. International Journal of Production Research, 1972; 101, pp 351-364.
[2]. Chang SC, Haung CA, Yu SY, Chang Y, Han WC, Shieh TS, Chung HC, Yao HT, Shyu GD, Hou HY, Wang CC, Wang WS, Tube Spinnability of AA2024 and AA7075 aluminum alloys, Journal of Material Processing and Technology, 1998; 80-81, pp 676-682.
[3]. Wong CC, Dean TA, Lin, Incremental forming of cylindrical components using flow forming principles. Journal of Material Processing and Technology, 2004; 153-154, pp 60-66.
[4]. Lee KS, Lu L, A study on the flow forming of cylindrical tubes, Journal of Material Processing and Technology, 2001; 13: pp 739-742.
[5]. Omer Savas, Ramazan Kayikci, Application of Taguchi's methods to investigate some factors affecting micro porosity formation in A360 Aluminum Alloy casting. Material and Design, 2007; 28, pp 2224-2228.

Abstract: During shipping, there are often emergency situations that threaten the safety of life. Therefore, every ship must be equipped with life safety equipment, one of which is a lifeboat used to leave the ship in the event of an accident. The purpose of the research was to determine the feasibility of lifeboat safety equipment in accordance with the 1974 SOLAS rules on the ship MT. Lapetta. This research is a form of qualitative descriptive research on the feasibility of lifeboats on MT. Lapetta. The results of this study indicate that the lifeboats on board the ship MT.Lapetta does not meet the standards of eligibility according to the 1974 SOLAS rules, especially regarding the completeness of the parts that should be on the lifeboats.

Key words: Feasibility, Equipment, Safety, Lifeboat, MT. Lapetta,

[1]. Aditama, Y., Daryanto, A., and Wisudo, S. H., 2014. The Strategic Planning Study of the Maritime Court. Report on Transportation Research, 26(3), 177-189. Retrieved February 8, 2022, from https://ojs.balitbanghub.dephub.go.id/index.php/warlit/article/view/880/591
[2]. Ministry of Transportation Directorate General of Sea Transportation, 1983. International Convention on the Safety of Life at Sea in 1974. Jakarta: Ministry of Transportation.
[3]. Directorate General of Sea Transportation, 1980. International Maritime Conventions Book I "SOLAS 74". Jakarta: Ministry of Transportation.
[4]. Malisan, J., 2013. Study of Escorting Ships Tonnage Less Than GT 7 in Inland Waters to Improve Shipping Safety, Sampit Case Study. Communication Research News, 25(1), 1-13. Retrieved February 8, 2022, from https://ojs.balitbanghub.dephub.go.id/index.php/warlit/article/view/700/419
[5]. BPLP Semarang Team, 2000. Ship Equipment for Commercial Ship Officers. Semarang: Semarang Shipping Science Polytechnic

Abstract: Derogation of waste is extremely significant in curtailing environmental menace evoked by human activities. Solid waste recycling and reuse are innate tenets in waste management with the aim of salvaging waste materials to wealth products. Concrete cubes of 150mm x 150mm x 150mm were cast with both fresh and recycled coarse aggregates for mix ratios of 1:2:4 and 1:1½:3 by weight. All mixtures were maintained at water/cement ratio of 0.55. The main property investigated was the compressive strength (fcu), after curing for 7, 14, 21 and 28days, respectively. With mix ratio of 1:2:4, the.....

Key words: Civil Engineering; Concrete; Recycling; Sustainability; Waste Minimization

[1]. Ravindrarajah RS, Stewart M, and Greco D. Variability of recycled concrete aggregate and its effects on the properties of concrete. 2001;113-124.
[2]. The Institution of Engineers, Australia. Proceedings of the natural symposium on the recycled materials in Engineering construction. 1996;217.
[3]. Standard association of Australia. SAA concrete structures. 1998;3600.
[4]. Masood A, Ahmad T, Arit M, Mahdi F. Waste management strategies for concrete, Environ Eng policy. 2001,3;15-18.
[5]. Chen HJ, Yen T, Chen KH. Use of building rubbles as recycled Aggregate, cement and concrete research. 2003,33;125-132.
[6]. Poon CS, Chan D. The use of recycled aggregate in concrete in Hong Kong Resources conservation and recycling. 2006,50(3);293-305.

Abstract: This study is a part of the study that focused on development of criteria for identification of potential water harvesting and artificial recharge sites. It takes into account the area of Wadi Nyala Aquifer. The study aims to investigate and optimize the existing hydrogeological parameters of the Aquifer. The model was achieved from 2013-2017 with 20 observation wells. Initially, in order to obtain the data overview, the observation data were evaluated. Using existing hydro-geological and meteorological data, the model was developed and calibrated.....

Key words: Groundwater; Numerical Simulation; MODFLOW; Parameters; Wadi Nyala Aquifer

[1]. Zhang B, Song X, Zhang Y, Han D, Tang C, Yu Y, Ma, YHydro-chemical characteristics and water quality assessment of surface water and groundwater in Songnen plain, Northeast China. Water Research. . 2012; 46: 2737-2748.
[2]. Saleh A, Al-Hassoun., Thamer A M. Prediction of Water Table in an Alluvial Aquifer using Modflow. Pertanika J. Sci. &Technol. 2011; 19 (1): 45 - 55.
[3]. Butler JJ. Jr. Pumping tests in no uniform aquifers: the radially symmetric case. J. Hydrol. 1988; 101(1/4): 15–30.
[4]. Theis C.V. The relation between the lowering of the piezometric surface and the rate and duration of discharge of a well using ground-water storage. Eos Trans Am Geophys Union. 1935; 16: 519 -524.
[5]. Butler JJ .Jr, and Liu W. pumping tests in no uniform aquifers: the radially asymmetric case. Water Resour Res. 1993; 29(2): 259–269.

Abstract: When the nozzle of a jet engine increases the velocity of a fluid, a lot of noise is produced. This noise is called jet noise and is unfavourable to the population and airports nearby. To subdue this problem, chevron nozzles are installed in jet engines. They help to reduce the pressure fluctuations and thus the jet noise. In this project study, N8 chevron nozzle, which is similar to chevrons installed at the trailing edge of nozzle of Bombardier CRJ900, is studied. Various models have been studied based on the geometric parameters of the chevrons to obtain effective design parameters of chevron nozzle. Selected designs of N8 chevron nozzle was modelled in CATIA and were analysed in ANSYS-Fluent software. In this project, acoustic power levels of those models are calculated at take-off and compared for obtaining an efficient model.
Results: N8β108 model shows the highest noise suppression experiences low acoustic power of just 100.45dB at a velocity of 590m/s.

Key words: Chevron nozzle; CFD analysis; Aircraft engine; Acoustic power

[1]. https://en.wikipedia.org/wiki/James_Lighthill
[2]. https://mitpress.mit.edu/books/aircraft-engines-and-gas-turbines
[3]. Malay Suvagiya, S. D. Sharma Malay Suvagiya, S. D. Sharma "On the effect of geometric parameters of chevron nozzle on generation of streamwise vortices in high subsonic jets" 20th Annual CFD Symposium, 2018
[4]. J.E. Bridges and C. Brown, "Parametric Testing of Chevrons on Single Flow Hot Jets" 10th AIAA/CEAS Aero-acou. Conf., 2004.
[5]. Tamer Raef, Aly Elzahaby, Mohhamed K Khalil "Enhancement of propulsion performance through jet noise reduction technologies: AReview" Conference Paper · May 2014.

Abstract: In this study, a drop test analysis of a cell phone was conducted by SolidWorks simulation software. The main purpose was to determine the stress due to impact and produce animation of the cell phone when it fell and hit the ground. At first, five parts, front camera, outer shell, glass screen, home button, and back camera of an i-Phone, were created in SolidWorks according to specific dimensions as part files and then assembled to develop the model for the study. The materials selected for the phone shell and home button was 7079 AL-alloy, and for the other three parts.....

Key words: Drop Test; SolidWorks Simulation; Impact Angle, Stress

[1]. Dassault Systèmes SolidWorks Corporation. SolidWorks Simulation Professional Training Booklet. 2013.
[2]. https://www.3ds.com/products-services/solidworks/ (March 23,2020)
[3]. Dassault Systèmes SolidWorks Corporation. SolidWorks Simulation Essential Training Booklet. 2013.
[4]. Tran, P. SolidWorks 2020 Basic Tools – Getting Started with Parts, Assemblies and Drawing, SDC Publications. 2019.

Abstract: Concrete structures ages with time that repeatedly necessitates speedy and operative repair of deteriorated sections so as to improve the durability and put to reuse the concrete structures under repair at the earliest time. Supplementary cementitious materials(SCM)like metakaolin(MK)and nano sized alumina particles etc observed to be as prospective resources in developing formulations of cementitious matrix used for fast track durable repairs. Previous scholars contributed studies with an aim to formulate cementitious matrix for speedy repairs, instituting the effect of incorporation of many materials like calcium suplho-aluminate cements, magnesium phosphate cement, nano sized materials, mono fibres,hybrid combinations of various fibres etc.,into cementitious systems pointing to.....

Keywords: Ternary blend Metakaolin Hybrid fibres Nano alumina

[1]. Şahmaran, Mustafa, Muhannad Al-Emam, Gürkan Yıldırım, Yunus Emre Şimşek, Tahir Kemal Erdem, and Mohamed Lachemi. "High-early-strength ductile cementitious composites with characteristics of low early-age shrinkage for repair of infrastructures." Materials and Structures 48, no. 5 (2015): 1389-1403.
[2]. Chen, Dar-Hao, Huang-Hsiung Lin, and Renjuan Sun. "Field performance evaluations of partial-depth repairs." Construction and Building Materials 25, no. 3 (2011): 1369-1378.
[3]. Adesina, Adeyemi. "Nanomaterials in cementitious composites: review of durability performance." Journal of Building Pathology and Rehabilitation 5, no. 1 (2020): 1-9.
[4]. Pillay, Deveshan L., Oladimeji B. Olalusi, Paul O. Awoyera, Carlos Rondon, Ana María Echeverría, and John Temitope Kolawole. "A Review of the Engineering Properties of Metakaolin Based Concrete: Towards Combatting Chloride Attack in Coastal/Marine.

Abstract: To produce quality rice, improvement in rice production management must begin at the farmer level (on-farm) by using high-quality seeds and good plant maintenance. Good quality rice is rice grains that don't break or crumble. To urge good quality rice, rice producers usually sort it manually. This method leads to long work processes and low productivity. Efforts to beat this problem are by designing a rice sorting machine which will separate whole rice and broken rice so on lighten the workload, improve rice quality, and increase prices. The results of the study obtained that the look specifications of the rice sieving machine were a). The sieving capacity is 10 kg of rice.......

Key Word: manual rice sort, machine rice sort, musculoskeletal complaints, and work productivity

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[5]. Adiputra, N. Pulse Rate and Its Use in Ergonomics. Indonesian Journal of Ergonomics. Vol. 3 No. 1, Juni: 22-26, 2000

Abstract: In the current research work, slurry erosive wear behaviour of plasma sprayed Cr2O3 and Cr3C2 coatings on low carbon steel substrate have been investigated with coating thickness of 100 and 200micrometers, The developed coated and uncoated substrate samples were characterized by means of microstructure studies, Vickers's micro hardness, and slurry erosive test for varying the process conditions on the erosive test rig. When compared to chromium oxide coated and uncoated mild steel substrates, plasma sprayed chromium carbide coatings on mild steel substrates exhibited higher resistance to wear under all test conditions studied. This could be due to the coated steel substrates' higher hardness and less porosity

Keywords: Atmospheric plasma spray, Mild steel substrate, Chromium Oxide, Chromium Carbide, Erosive Wear

[1]. S.K.Acharya,V.Dikshit and P.Mishra,"Erosive Wear behaviour of Red mud filled Metal Matrix Composite," Journal of Reinforced Plastics and Composites, vol. 27, no. 2, pp. 145–152,(2008),View at: Publisher Site | Google Scholar.
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[4]. Chinnakurli S.R, Rupanagudi S.K, Nagaraj .A, "Slurry erosive Wear behaviour of TiO2-30Wt% Inconel-718 Plasma Sprayed Coatings on Al6061 substrate. The Society of Tribologists and Lubrication Engineers (STLE), (2016), 15–19; Las Vegas.
[5]. Krishnamurthy N, Murali.S, Venkataraman B, "Characterization and Solid particle Erosion behaviour of Plasma Sprayed Alumina and Calcia-Stabilized Zirconia Coatings on Al-6061substrate. Wear. 2012; 274– 275:15–27.