Conference Proceedings

DNS of hydrogen auto-ignition under HCCI-like conditions with wall heat transfer; parametric study

J Behzadi, M Bolla, M TALEI, ER Hawkes, S Kook, Y Yang (ed.), N Smith (ed.)

Proceedings of the Australian Combustion Symposium | The Combustion Institute Australia & New Zealand Section | Published : 2015

Abstract

Two-dimensional direct numerical simulations (DNSs) are performed to study the effect of wall heat transfer on the auto-ignition of lean hydrogen-air mixtures in the presence of temperature stratifications at conditions relevant to homogeneous charge compression ignition (HCCI) engines. The DNS are used to further advance combustion modelling for HCCI combustion previously developed using periodic boundary conditions. The simulations are initialised using the statistics available from a previous DNS study of compression heating under HCCI conditions which considered an idealised engine geometry [1]. Three different wall temperatures, leading to three different levels of temperature stratific..

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