Numerical investigation of the auto-ignition of transient hydrogen injection in supersonic airflow

被引:20
|
作者
Liu, Bing [1 ]
An, Jian [1 ]
Qin, Fei [1 ]
He, Guo-Qiang [1 ]
Zhang, Duo [1 ]
Wu, Su-li [2 ]
Shi, Lei [1 ]
Li, Rui [1 ]
机构
[1] Northwestern Polytech Univ, Internal Flow & Thermal Struct Lab, Sci & Technol Combust, Xian 710072, Shaanxi, Peoples R China
[2] Xian Modern Control Technol Res Inst, Xian 710065, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Transient auto-ignition; Supersonic flow; Large eddy simulation; Heat release rate; LARGE-EDDY SIMULATION; LASER-INDUCED PLASMA; FLAME STABILIZATION; TURBULENT COMBUSTION; SCRAMJET COMBUSTOR; JET COMBUSTION; HEAT RELEASE; CROSS-FLOW; ENGINE; MODES;
D O I
10.1016/j.ijhydene.2019.07.215
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
The auto-ignition process in high Mach number airflow is performed by Large Eddy Simulation. The predictions are in good agreement with experiment. The temporal and spatial analysis of the auto-ignition process are carried out. The results show that the auto-ignition process can be divided into five stages in terms of time sequence, and there are three regions in space at the steady state. It is also found that the maximum mass fraction of HO2 is one of the best indicators to see whether the scramjet working on high Mach number reaches steady state, and the flame stabilization is dominated by auto-ignition. The heat release rate of different combustion modes is calculated. It reveals that the supersonic combustion mode dominates in all stages and regions, but premixed combustion mode dominates only in transient auto-ignition stage and the auto-ignition region. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:25042 / 25053
页数:12
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