Effects of heat loss and viscosity friction at walls on flame acceleration and deflagration to detonation transition

作     者：Jin Huang Wenhu Han Xiangyu Gao Cheng Wang 黄金;韩文虎;高向宇;王成

作者机构：Beijing Priority Laboratory of Earthquake Engineering and Structural Retrofit Beijing University of Technology Beijing 100124 China State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2019年第28卷第7期

页      面：312-318页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11732003 and 11521062) the National Key Research and Development Program of China(Grant No.2017YFC0804700) 

主　　题：micro-scale channel heat loss oscillating flame deflagration to detonation transition(DDT) 

摘      要：The coupled effect of wall heat loss and viscosity friction on flame propagation and deflagration to detonation transition(DDT) in micro-scale channel is investigated by high-resolution numerical *** results show that when the heat loss at walls is considered, the oscillating flame presents a reciprocating motion of the flame *** channel width and Boit number are varied to understand the effect of heat loss on the oscillating flame and *** is found that the oscillating propagation is determined by the competition between wall heat loss and viscous *** flame retreat is led by the adverse pressure gradient caused by thermal contraction, while it is inhibited by the viscous effects of wall friction and flame boundary *** adverse pressure gradient formed in front of a flame, caused by the heat loss and thermal contraction, is the main reason for the flame ***, the oscillating flame can develop to a detonation due to the pressure rise by thermal expansion and wall *** transition to detonation depends non-monotonically on the channel width.