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

被引：30

作者：

Wang, Z. ^{[1
]}

Qi, Y. ^{[1
]}

Liu, H. ^{[1
]}

Zhang, P. ^{[2
]}

He, X. ^{[3
]}

Wang, J. ^{[1
]}

机构：

[1] Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Ctr Combust Energy, Beijing 100084, Peoples R China

[3] Aramco Serv Co, Aramco Res Ctr, Detroit, MI 48377 USA

来源：

SHOCK WAVES | 2016年 / 26卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Super-knock; RCM; Detonation; Shock wave; REACTION FRONT PROPAGATION; PRE-IGNITION; SUPER-KNOCK; ENGINES;

D O I：

10.1007/s00193-016-0677-5

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

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.

引用

页码：687 / 691

页数：5

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