The effect of compression on a swirling/tumbling flow is studied using Large-Eddy Simulations (LES). In this study the geometry investigated is a cylinder with an artificially created swirling/tumbling motion. During compression the evolution of turbulence and vorticity are investigated. An increase of turbulence and vorticity is observed and linked to vorticity-dilatation interaction. It is shown that for swirling/tumbling flows turbulent kinetic energy available at Top Dead Center (TDC) is introduced by the piston through the vorticity-dilatation interaction and that turbulence increases independently of the presence of instability of the large scale flow structures.
- Internal Combustion Engine Division
Compression of a Swirling and Tumbling Flow
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Söder, M, Prahl Wittberg, L, Lindgren, B, & Fuchs, L. "Compression of a Swirling and Tumbling Flow." Proceedings of the ASME 2013 Internal Combustion Engine Division Fall Technical Conference. Volume 2: Fuels; Numerical Simulation; Engine Design, Lubrication, and Applications. Dearborn, Michigan, USA. October 13–16, 2013. V002T06A013. ASME. https://doi.org/10.1115/ICEF2013-19128
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