Shock wave reflection induced detonation (SWRID) under high pressure and temperature condition in closed cylinder

被引：0
作者：
Z. Wang
Y. Qi
H. Liu
P. Zhang
X. He
J. Wang
机构：
[1] Tsinghua University,State Key Laboratory of Automotive Safety and Energy
[2] Tsinghua University,Center for Combustion Energy
[3] Aramco Services Company,Aramco Research Center, Detroit
来源：
Shock Waves | 2016年 / 26卷
关键词：
Super-knock; RCM; Detonation; Shock wave;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Super-knock is one of the major obstacles for improving power density in advanced internal combustion engines (ICE). This work studied the mechanism of super-knock initiation using a rapid compression machine that simulated conditions relevant to ICEs and provided excellent optical accessibility. Based on the high-speed images and pressure traces of the stoichiometric iso-octane/oxygen/nitrogen combustion under high-temperature and high-pressure conditions, it was observed that detonation was first initiated in the near-wall region as a result of shock wave reflection. Before detonation was initiated, the speed of the combustion wave front was less than that of the Chapman–Jouguet (C–J) detonation speed (around 1840 m/s). In the immediate vicinity of the initiation, the detonation speed was much higher than that of the C–J detonation.
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页码：687 / 691
页数：4
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