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Knock Prediction Using Multidimensional Modelling on Gasoline Engines
Published October 27, 2004 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
A multidimensional model for the simulation of flow and combustion internal engine was extended to knock calculation. A flamelet model suggested by Tahry based on probability of finding the flame has been implemented for accurate prediction of flame propagation for homogeneous charge turbulent premixed combustion. Shell model presented by Halstead was modified on mass conservation was employed for knock calculation, and combined with laminar flamelet model to estimate knock onset location. Visualization of flame propagation and knock detection has been carried out on an optical access engine and an actual engine with an optical access spark plug, respectively. The results showed that the calculated flame propagation was well predicted. Simulation of knock onset location was also shown to be possible.