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Experimental and numerical investigation of swirl enhancing grooves on the flow and combustion characteristics of a DI diesel engine

Author

Listed:
  • Prabhakaran, P.
  • Ramesh, P.
  • Saravanan, C.G.
  • Loganathan, M.
  • James Gunasekaran, E.

Abstract

This paper discusses the results of numerical and experimental investigations carried out with swirl enhancing modifications on a DI diesel engine. Six tangential holes on each piston with diameters of the hole varying from 2, 2.5, 3 and 3.5 mm are made in the piston with suitable inclinations with respect to the cylinder axis. Numerical investigations are carried out at full load condition with the modified engine piston. Results reveal that the tangential hole of 2.5 mm produce a better combustion and higher pressure. The swirl motion as well as kinetic energy increases with the increasing hole diameters. The piston with 2.5 mm hole produce a highest performance improvement while the pistons with higher diameter than 2.5 mm produce a slightly lower performance. While the increase in diameter increases the flow field characteristics like swirl, the performance declines beyond 2.5 mm. Considering the performance point of view a 2.5 mm diameter hole provides better combustion and hence highest pressure for the same fuel injected. The other holes like 2.5 mm, 3 mm and 3.5 mm have slightly higher soot emission. Since numerical results proved that 2.5 mm provides a better performance, only three tangential holes 2 mm, 2.5 mm and 3 mm were taken up for experimental investigation. Of all the modifications the 2.5 mm piston gives better performance with higher brake thermal efficiency and lowest soot emission.

Suggested Citation

  • Prabhakaran, P. & Ramesh, P. & Saravanan, C.G. & Loganathan, M. & James Gunasekaran, E., 2016. "Experimental and numerical investigation of swirl enhancing grooves on the flow and combustion characteristics of a DI diesel engine," Energy, Elsevier, vol. 115(P1), pages 1234-1245.
    • Handle: RePEc:eee:energy:v:115:y:2016:i:p1:p:1234-1245
    DOI: 10.1016/j.energy.2016.09.063
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    References listed on IDEAS

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    1. Prasad, B.V.V.S.U. & Sharma, C.S. & Anand, T.N.C. & Ravikrishna, R.V., 2011. "High swirl-inducing piston bowls in small diesel engines for emission reduction," Applied Energy, Elsevier, vol. 88(7), pages 2355-2367, July.
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    1. Nayak, Swarup Kumar & Mishra, Purna Chandra & Noor, Muhamad Mat, 2019. "Simultaneous reduction of nitric oxide and smoke opacity in TDI dual fuel engine fuelled with calophyllum-diesel blends and waste wood chip gas for modified inlet valve and injector nozzle geometry," Energy, Elsevier, vol. 189(C).
    2. Hamid, M. Fadzli & Idroas, M. Yusof & Mazlan, M. & Sa'ad, S. & Teoh, Y.H. & Che Mat, S. & Miskam, M.A. & Abdullah, M.K., 2022. "Methods for improving the in-cylinder airflow characteristics for sustainable transportation using fuels with higher viscosity: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 155(C).
    3. Chen, Lin & Wei, Haiqiao & Chen, Ceyuan & Feng, Dengquan & Zhou, Lei & Pan, Jiaying, 2019. "Numerical investigations on the effects of turbulence intensity on knocking combustion in a downsized gasoline engine," Energy, Elsevier, vol. 166(C), pages 318-325.

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