Conference Proceedings

Conditional moment closure modelling for HCCI featuring compression heating and expansion cooling

F Salehi, M TALEI, ER Hawkes, A Bhagatwala, JH Chen, S Kook

9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015 | International Symposium on Turbulence and Shear Flow Phenomena (TSFP) | Published : 2015

Abstract

This paper presents a conditional moment closure (CMC) model for ignition of a lean ethanol/air mixture under homogeneous charge compression ignition (HCCI) conditions. A set of direct numerical simulations (DNSs) presented by Bhagatwala et al. (2014) is used to evaluate the performance of the CMC model. The DNS data includes five cases with a mean temperature of 924 K and three different levels of thermal stratification. The effect of compression heating and expansion cooling is considered in the first three cases with T' = 15, 25 and 40 K. For this purpose, an inert mass source term is added to the governing equations. However, the other two cases with T' = 15 and 40 K do not consider comp..

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University of Melbourne Researchers