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| A numerical analysis of the effects of a stratified pre-mixture on homogeneous charge compression ignition combustion
Narankhuu Jamsran and Ock Taeck Lim*
The Journal of Mechanical Science and Technology, vol. 26, no. 6, pp.1929-1935, 2012
Abstract : We investigated the efficacy of fuel stratification in a pre-mixture of dimethyl ether (DME) and n-butane, which have different autoignition
characteristics, for reducing the pressure rise rate (PRR) of homogeneous charge compression ignition engines. A new chemical
reaction model was created by mixing DME and n-butane and compared with existing chemical reaction models to verify the effects
observed. The maximum PRR depended on the mixture ratio. When DME was charged with stratification and n-butane was charged with
homogeneity, the maximum PRR was the lowest among all the mixtures studied. Calculations were performed using CHEMKIN and
modified using SENKIN software.
Keyword : Dimethyl ether; HCCI; n-Butane; Stratification; Pressure rise rate |
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