Title :
Tumble instability in the IC engine
Author :
Fogleman, Mark ; Lumley, John ; Haworth, Daniel ; Rempfer, Dietmar
Author_Institution :
Cornell Univ., Ithaca, NY, USA
Abstract :
Summary form only given. The objective of this project is to analyze the instability associated with the breakdown of tumble during compression of an internal combustion engine flow. It has been observed that the tumble vortex (a vortex whose axis is perpendicular to the cylinder axis which is produced during intake by an asymmetry of the valve(s)) becomes unstable during compression and ultimately leads to turbulence near the end of compression. This turbulence leads directly to better engine performance and the possible use of leaner fuel mixtures via faster burning rates.
Keywords :
compressible flow; flow instability; internal combustion engines; turbulence; vortices; IC engine; burning rates; compression; engine performance; instability analysis; internal combustion engine flow; leaner fuel mixtures; tumble breakdown; tumble instability; tumble vortex; turbulence; valve asymmetry; Convergence; Design methodology; Electric breakdown; Ellipsoids; Engine cylinders; Fuels; Internal combustion engines; Pistons; Valves; Velocity measurement;
Conference_Titel :
Decision and Control, 2002, Proceedings of the 41st IEEE Conference on
Print_ISBN :
0-7803-7516-5
DOI :
10.1109/CDC.2002.1184378
