Experimental and numerical study on premixed hydrogen/air flame propagation in a horizontal rectangular closed duct

被引：54

作者：

Xiao, Huahua ^{[1
]}

Wang, Qingsong ^{[1
]}

He, Xuechao ^{[1
]}

Sun, Jinhua ^{[1
]}

Yao, Liyin ^{[1
]}

机构：

[1] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Schlieren; CFD; Hydrogen premixed flame; Tulip flame; Reverse flow; Vortex; TULIP FLAME; FLOW; COMBUSTION; SIMULATION; TUBES; MODEL;

D O I：

10.1016/j.ijhydene.2009.12.001

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：

Hydrogen is a promising energy in the future, and it is desirable to characterize the combustion behavior of its blends with air. The premixed hydrogen/air flame microstructure and propagation in a horizontal rectangular closed duct were recorded using high-speed video and Schlieren device. Numerical simulation was also performed on Fluent CFD code to compare with the experimental result. A tulip flame is formed during the flame propagating, and then the tulip flame formation mechanism was proposed based on the analysis. The induced reverse flow and vortex motion were observed both in experiment and simulation. The interactions among the flame, reverse flow and vortices in the burned gas change the flame shape and ultimately it develops into a tulip flame. During the formation of the tulip flame, the tulip cusp slows down and stops moving after its slightly forward moving, and then, it starts to move backward and keeps on a longer time, after that, it moves forward again. The structure of the tulip flame is becoming less stable with its length decreasing in flame propagation direction. The flame thickness increases gradually which is due to turbulence combustion. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

引用

页码：1367 / 1376

页数：10

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