Qualification: 
M.E
d_senthilkumar@cb.amrita.edu

Senthilkumar D. currently serves as Assistant Professor at the department of Mechanical Engineering, School of Engineering, Coimbatore Campus. Senthilkumar joined Amrita in the year 2008. He received his B. E. in Mechanical Engineering from Bharthidasan University and M. E. in Thermal Engineering from Annamalai University. Currently, he is pursuing his Doctoral degree in Amrita Vishwa Vidyapeetham.

He is interested in teaching as well as in research. He has published research papers in international journals and conferences. He has guided several M. Tech. and B. Tech. projects. His research interest includes Internal Combustion Engines, Alternate fuels, Engine testing. Senthilkumar is a Life Member of Indian Society for Technical Education (ISTE) and a member of Society of Automotive Engineers (SAE).

Teaching

  • Heat Power Engineering
  • Engineering Thermodynamics
  • Fluid Mechanics and machinery.
  • Heat Transfer
  • Mechanical science
  • Instrumentation and Control system
  • Engineering Graphics

Work Experience

Year Affiliation
January 2011 - Present Assistant Professor (Senior Grade), Department Of Mechanical Engineering
Amrita Vishwa Vidyapeetham
June 2008 - December 31, 2010. Assistant Professor, Department Of Mechanical Engineering
Amrita Vishwa Vidyapeetham
July 2004 - April 2008 Lecturer, Department of Mechanical Engineering
Muthayammal Engineering College, Namakkal

Publications

Publication Type: Journal Article

Year of Conference Publication Type Title

2017

Journal Article

V. Salamon, Senthilkumar D., and Thirumalini, S., “Experimental Investigation of Heat Transfer Characteristics of Automobile Radiator using TiO 2 -Nanofluid Coolant”, IOP Conference Series: Materials Science and Engineering, vol. 225, p. 012101, 2017.[Abstract]


The use of nanoparticle dispersed coolants in automobile radiators improves the heat transfer rate and facilitates overall reduction in size of the radiators. In this study, the heat transfer characteristics of water/propylene glycol based TiO 2 nanofluid was analyzed experimentally and compared with pure water and water/propylene glycol mixture. Two different concentrations of nanofluids were prepared by adding 0.1 vol. % and 0.3 vol. % of TiO 2 nanoparticles into water/propylene glycol mixture (70:30). The experiments were conducted by varying the coolant flow rate between 3 to 6 lit/min for various coolant temperatures (50°C, 60°C, 70°C, and 80°C) to understand the effect of coolant flow rate on heat transfer. The results showed that the Nusselt number of the nanofluid coolant increases with increase in flow rate. At low inlet coolant temperature the water/propylene glycol mixture showed higher heat transfer rate when compared with nanofluid coolant. However at higher operating temperature and higher coolant flow rate, 0.3 vol. % of TiO 2 nanofluid enhances the heat transfer rate by 8.5% when compared to base fluids.

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2016

Journal Article

V. R. Varthan and Senthilkumar D., “Emission Characteristics of Turbocharged Single Cylinder Diesel Engine”, Indian Journal of Science and Technology, vol. 9, 2016.[Abstract]


Fossil fuel reserves are depleting at an alarming rate and may become extinct in few decades. To counteract this crisis much emphasis is laid out on usage of alternate fuels. Also techniques like turbocharging are used to increase the efficiency of the IC engines thereby reducing the fuel consumption. While opting for such alternate solutions like biodiesel and turbocharging, the exhaust emissions should be checked to ensure that these solutions don't pose a threat to the environment. So in this project the change in amount of component gases in the exhaust emissions were found out in four cases which are naturally aspirated with diesel, turbocharged with diesel, naturally aspirated with biodiesel and turbocharged with biodiesel. A single cylinder motorcycle diesel engine is used in this project. Emission characteristic tests were done in the naturally aspirated engine using diesel and biodiesel as fuels. Then a turbocharger designed for this engine is fitted to it and the same tests as above were conducted. Comparison in exhaust emissions which are NOx, HC, CO and CO2 was made for the above mentioned four cases. It was found that NOx emissions has increased by the usage of biodiesel as fuel, while turbocharger has decreased the NOx levels. This is a concern to be addressed while using biodiesel as alternate fuel. Biodiesel and turbocharger both had a positive effect on HC emissions, i.e. reduced the HC emissions. The impact of biodiesel and turbocharger on CO emissions was not so significant with the former increasing the emissions and the latter decreasing it by providing more oxygen. Though CO2 is not categorised as toxic emissions like other emissions; it is important to compare the amount emitted in the different cases. Biodiesel increases the amount of less-toxic CO2 whereas turbocharger has reduced the CO2 emissions. This is because the excess oxygen provided by turbocharging is used for the formation of water vapour rather than CO2. Thus the important four emissions were compared to appreciate the effect of biodiesel and turbocharger. In future work the problem of increase in NOx by biodiesel fuel should be addressed and solution has to be formulated.

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2015

Journal Article

Ma Arun, Senthilkumar D., and Nabriya, K. Sb, “Optimization of Twin Cylinder Naturally Aspirated Diesel Engine for CPCB II Emission Limits”, International Journal of Applied Engineering Research, vol. 10, pp. 37176-37179, 2015.[Abstract]


For Power Generation diesel engines are predominantly being used due to higher thermal efficiency and fuel efficiency compared to petrol engines. With increase in awareness of air pollution and global warming all over the world government organisations have started announcing legislations to limit exhaust emissions for a cleaner and greener environment. In India, Central Pollution Control Board (CPCB) has proposed to introduce the next stage of stringent emission norms for engines used in Power Generation from April 2014 which are comparable to the best in the world. This research work deals with the strategies applied and experimentation details to meet the proposed CPCB Stage-II emission limits. According to CPCB II emission limits, NO<inf>x</inf>+HC emissions for a naturally aspirated diesel engines have to be reduced by 28%. Achieving this target with minimum engine modification will be a difficult task. An experimental study was conducted on a twin cylinder naturally aspirated diesel engine. Various combustion parameters like catalytic converter, direct continuousEGR, static injection timing were optimized in a cost effective manner in order to achieve CPCB II limits with sufficient margin. The experimental study indicates that, the CO emission has been decreased with 20% margin and HC+NO<inf>x</inf> emission has been decreased with 15% margin from CPCB II limits. © Research India Publications.

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2015

Journal Article

S. Prabhakar.N, Senthilkumar D., and Dr. Thirumalini S., “Analysis of Regenerator Matrix in a Gamma Type Solar Stirling Engine”, International Journal of Applied Engineering Research (IJAER), vol. 10, no. 19, 2015.

2015

Journal Article

N. Tom Varghese and Senthilkumar D., “Study on Effects of Magnetization of Fuel on Diesel Engine ”, International Journal of Applied Engineering Research, vol. 10, pp. 37866-37870, 2015.

Publication Type: Conference Proceedings

Year of Conference Publication Type Title

2016

Conference Proceedings

M. Abilash, Senthilkumar D., Padmanabham, G., ,, Dr. Padmanaban R., and Dr. Thirumalini S., “The effect of welding direction in CO 2 LASER - MIG hybrid welding of mild steel plates”, IOP Conference Series: Materials Science and Engineering, vol. 149. p. 012031, 2016.[Abstract]


In this paper, hybrid laser-arc welding process has been studied based on the relative position of the laser and the arc (i.e. laser-leading and arc-leading arrangement) and, the effects of welding parameters, such as the laser power, arc current, arc voltage and the welding speed on the weld bead were investigated. The study indicates that the welding direction has a significant effect on the weld bead and weld pool behaviour. The result shows that laserleading configuration shows better bead characteristics when compared to arc-leading configuration. This is because in the laser-leading case molten metal flow is inward, while in the arc-leading case the metal flow is outward leading to variation in solidification front resulting in lack of synergic effects of both processes.

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2015

Conference Proceedings

M. .Abilash, Senthilkumar D., and .Sathiseelan, N., “Optimization of Welding Parameters using Plasma Arc Welding for SS316 Material”, International conference on Innovative Research Techniques in Management Aeronautical Mechanical and Electrical systems. 2015.

2014

Conference Proceedings

Senthilkumar D., .Ajaykrishna, R., and .Thirumalini, S., “Theoretical Analysis of Critical Design Parameters for Maximum Thermal Efficiency of Solar Stirling Engines”, International conference on Advances in Design and Manufacturing. National Institute of Technology, Tiruchirappalli, 2014.

Publication Type: Conference Paper

Year of Conference Publication Type Title

2015

Conference Paper

S. Bhaskar, Katib, W. Ahmed, and Senthilkumar D., “Investigation of Phase Change Material as a Potential Replacement of EGR Cooler”, in Mechanical and Aerospace Engineering VI, 2015.[Abstract]


Phase Change Materials (PCM) are used widely in passive heat storage system due to their high heat retention capacities. In the present work an attempt is made to use the PCM as an effective replacement to conventional EGR cooler. The prime advantages of using PCM as an alternative to the traditionally used EGR coolers are that, the pumping operation will no longer be a continuous process hence the power consumed by pumps would drastically reduce, so does the load on the engine and secondly there would be significant reduction in the weight of the system which would ultimately boost the fuel economy of the vehicle. The PCM candidate chosen for study is a Salt blend (59%KF+29%LiF+12%NaF). The chosen specimen's thermal performance is computed based on the duration for which the refrigerant pump remains idle. Using numerical simulation the melting period of PCM(Salt Blend) is computed and the simulation is verified by already established numerical and experimental results for a different material, Rubitherm (RT-42).

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