Numerical simulation of one-dimensional aluminum particle-air detonation with realistic heat capacities

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Numerical simulation of one-dimensional aluminum particle-air detonation with realistic heat capacities
	Teng HH(滕宏辉); Jiang ZL(姜宗林)
刊名	COMBUSTION AND FLAME
	2013-02
通讯作者邮箱	hhteng@imech.ac.cn
卷号	160 期号:2 页码:463-472
关键词	Al particle Detonation wave Heat capacity Hybrid model
ISSN号	0010-2180
通讯作者	Teng, HH (reprint author), Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China.
产权排序	[Teng, Honghui; Jiang, Zonglin] Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China
中文摘要	Aluminum (Al) particle-air detonation is very complicated because it includes multi-phase combustion phenomenon. Thus numerical simulations are often over-simplified. Here, the detonation is simulated by solving one-dimensional equations with more realistic heat capacities that vary with the dust mixture temperature. The effect on detonation parameters from the realistic heat capacities for the solid particles is investigated with a hybrid combustion model. The calculated results indicate that the detonation pressure, temperature and velocity vary significantly with changes in the heat capacity. Except for the velocity, these parameters are overestimated in numerical simulations when a constant heat capacity of the pre-shock mixtures is used. Furthermore, the realistic heat capacities have a strong effect on small diameter particles, but a weak effect on large diameter particles. Thus, when constant heat capacities are used, the combustion characteristic lengths are a function of the particle diameters with a power dependence of 1.77, whereas the power dependence decreases to 1.49 when realistic heat capacities are used. Moreover, if realistic heat capacities are applied, an "abnormal" strong detonation wave may appear in a dust mixture having large diameter particles. This phenomenon is consistent with the current combustion model, but it indicates that the value of heat released should also vary with the gas temperature in a fashion similar to that of the heat capacities.
学科主题	流体力学
分类号	一类
收录类别	SCI ; EI
资助信息	National Natural Science Foundation of China NSFC [90916028]
原文出处	http://dx.doi.org/10.1016/j.combustflame.2012.10.018
语种	英语
WOS记录号	WOS:000313405500022
公开日期	2013-03-07
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/47021]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Teng HH,Jiang ZL. Numerical simulation of one-dimensional aluminum particle-air detonation with realistic heat capacities[J]. COMBUSTION AND FLAME,2013,160(2):463-472.
APA	Teng HH,&Jiang ZL.(2013).Numerical simulation of one-dimensional aluminum particle-air detonation with realistic heat capacities.COMBUSTION AND FLAME,160(2),463-472.
MLA	Teng HH,et al."Numerical simulation of one-dimensional aluminum particle-air detonation with realistic heat capacities".COMBUSTION AND FLAME 160.2(2013):463-472.