Numerical study of hydrogen-oxygen flame acceleration and deflagration to detonation transition in combustion light gas gun

被引：12

作者：

Zhou, Fei ^{[1
]}

Liu, Ning ^{[1
]}

Zhang, Xiangyan ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Mech Engn, Nanjing 210094, Jiangsu, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2018年 / 43卷 / 10期

关键词：

Combustion light gas gun; Hydrogen explosion; DDT; LES; NO-SLIP WALLS; AIR MIXTURE; DDT; CHANNELS; SIMULATION; PROPAGATION; EXPLOSIONS; IGNITION; LES;

D O I：

10.1016/j.ijhydene.2017.11.134

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A large eddy model with detailed chemical reaction mechanism is developed to investigate the interior ballistic process of the combustion light gas gun (CLGG). Flame acceleration and deflagration to detonation transition process with high initial pressure and low initial temperature hydrogen oxygen mixture in CLGG is numerically studied. Simulation results indicate that the hydrogen oxygen flame propagation experiences an exponential acceleration stage, a nearly uniform propagation stage and a fast reacceleration stage. Detonation can be triggered through two different mechanisms, which are the amplification between the overlapped shock wave at flame surface, and the elevated flame velocity and shock strength caused by local explosions. Reflected shock waves play an important role in the suppression of the flame propagation when the flame front is close to the chamber throat, leading to a deceleration of the deflagration flame. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：5405 / 5414

页数：10

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