DNS of H2/air combustion in a constant volume enclosure relevant to HCCI engines

被引：2
|
作者：
Zhang, F. [1 ]
Yu, R. [1 ]
Bai, X. S. [1 ]
机构：
[1] Lund Univ, Div Fluid Mech, S-22100 Lund, Sweden
来源：
INTERNATIONAL CONFERENCE ON APPLIED ENERGY, ICAE2014 | 2014年 / 61卷
关键词：
direct numerical simulation; HCCI engines; turbulent combustion; flame propagation; ignition front propagation; DIRECT NUMERICAL-SIMULATION; IGNITION FRONT PROPAGATION; TEMPERATURE INHOMOGENEITIES; AUTOIGNITION;
D O I：
10.1016/j.egypro.2014.12.164
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Two-dimensional direct numerical simulation (2D-DNS) is used to investigate the effect of turbulence intensity and composition stratification on the ignition of H-2/air mixture in a constant volume enclosure relevant to homogeneous charge compression ignition (HCCI) engines. A comprehensive H-2 chemical kinetic mechanism is adopted, involving 9 species and 21 elementary reactions. Different turbulence levels and composition fluctuations are simulated to investigate their influence on the combustion behavior. The results show that the ignition delay time tends to be prolonged and the heat release rate increased under higher turbulence intensity. Turbulence can affect the reaction zone, e.g., through wrinkling of reaction front. Higher composition stratification can smoothen the heat release rate. It is found that in HCCI engine flame propagation can co-exist with volumetric auto-ignition. (C) 2014 The Authors. Published by Elsevier Ltd.
引用
收藏
页码：1536 / 1539
页数：4
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