Title: Computational and experimental study of swirl flow within SI engine with modified shrouded intake valve

Authors: Bidesh Roy; Rahul Dev Misra; Krishna Murari Pandey; Abhijit Sinha; Bachu Deb

Addresses: Department of Mechanical Engineering, National Institute of Technology Mizoram, Aizawl, Pin-796012, India ' Department of Mechanical Engineering, National Institute of Technology Silchar, Assam, Pin-788010, India ' Department of Mechanical Engineering, National Institute of Technology Silchar, Assam, Pin-788010, India ' Department of Mechanical Engineering, National Institute of Technology Mizoram, Aizawl, Pin-796012, India ' Department of Mechanical Engineering, National Institute of Technology Mizoram, Aizawl, Pin-796012, India

Abstract: Swirling flow can be used in a spark-ignition engine to increase turbulence intensity of the working fluid in the engine by using a shrouded intake valve. However, on using shrouded intake valve, a greater restriction to the incoming fluid is offered. In this backdrop, a computational and experimental study of swirl flow within the spark-ignition engine with a modified shrouded intake valve has been carried out and the same is then compared with 100°, 120° and 180° shrouded intake valves. The results show that the fluid flow patterns generated by the intake valves within the engine cylinder are similar in nature. The engine with the modified shrouded intake valve generates a substantial amount of swirl with comparatively lesser restriction to the incoming fluid. Whereas, the engine using other types of intake valves, either generates higher swirl ratio with lower mean flow coefficient or lower swirl ratio with higher mean flow coefficient.

Keywords: computational fluid dynamics; CFD; mean flow coefficient; modified shrouded intake valve; spark ignition engine; steady flow test; swirl ratio.

DOI: 10.1504/PCFD.2019.098473

Progress in Computational Fluid Dynamics, An International Journal, 2019 Vol.19 No.2, pp.123 - 136

Accepted: 21 Jul 2017
Published online: 19 Mar 2019 *

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