Flame stabilization mechanism study in a hydrogen-fueled model supersonic combustor under different air inflow conditions

被引：47

作者：

Qin, Fei ^{[1
]}

Huang, Zhi-wei ^{[1
]}

He, Guo-qiang ^{[1
]}

Wang, Shuai ^{[1
]}

Wei, Xiang-geng ^{[1
]}

Liu, Bing ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sci & Technol Combust Internal Flow & Thermal Str, Xian 710072, Shaanxi, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 33期

基金：

中国国家自然科学基金;

关键词：

Flame stabilization; Large eddy simulation; Supersonic combustion; Hydrogen; Time scale comparison; LARGE-EDDY SIMULATION; FINITE-RATE CHEMISTRY; SCRAMJET COMBUSTOR; IGNITION; FLOW; INJECTION; CONFIGURATIONS; OSCILLATION; PERFORMANCE; TRANSITION;

D O I：

10.1016/j.ijhydene.2017.06.237

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：

Flame stabilization mechanisms of a hydrogen-fueled laboratory model scramjet combustor are numerically studied. The combustor consists of a sonic fuel jet injected paralleling into a supersonic air flow at the base of a wedge-shaped strut. The numerical calculations are based on an Open Source Field Operation and Manipulation (OpenFOAM) solver using the large eddy simulation method. A skeletal mechanism for hydrogen-air chemistry including 9 species 27 reactions is used to depict the combustion dynamics. Three cases with air stagnation temperature of 568 K, 460 K, and 960 K, are respectively studied under the same equivalence ratio and entrance Mach number. Damkoler number based on the subgrid turbulent mixing time scale and the instantaneous chemical time scale is used to distinguish the role of mixture self-igniting from flame propagation in different air inflows. Flame stabilization in such strut-based combustor is compared with that of cavity-based one. It is found that the basic working principles for the two types of combustor are similar. However, the strut shows more simplicity in flame stabilization locations. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：21360 / 21370

页数：11

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