Prediction of Heat Release Rate and Engine Emissions Using an Unsteady Flamelet Model Approach for a Compression Ignition Engine

S. Imran, F. Noor, R. Shad, Z. Anwar, A. Hussain


Diesel Unsteady Flamelet Model (DUFM) approach along with probability density function (PDF) has been used to investigate the effect of breakup length on the in-cylinder pressure and the rate of heat release. Two spray breakup models, WAVE and Kelvin-Helmohltz Rayleigh Taylor (KHRT), have been investigated by varying the magnitude of the breakup constants. The optimized set of parameters are used to predict the in-cylinder pressure, the rate of heat release and NOx emissions in a direct injection (DI) engine. A chemical mechanism of n-heptane with 29 species and 52 reactions has been used.


Chemical Kinetics, Computational combustion, unsteady flamelet model, spray and combustion, compression ignition,

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Published by Pakistan Institute of Chemical Engineers (PIChE)

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