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Numerical simulation of one-dimensional aluminum particle-air detonation with realistic heat capacities
Teng HH(滕宏辉); Jiang ZL(姜宗林); Teng, HH (reprint author), Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China.
Source PublicationCOMBUSTION AND FLAME
2013-02
Volume160Issue:2Pages:463-472
ISSN0010-2180
AbstractAluminum (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.
KeywordAl Particle Detonation Wave Heat Capacity Hybrid Model
Subject Area流体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000313405500022
Funding OrganizationNational Natural Science Foundation of China NSFC [90916028]
DepartmentLHD激波与爆轰物理
Classification一类
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47021
Collection高温气体动力学国家重点实验室
Corresponding AuthorTeng, HH (reprint author), Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Teng HH,Jiang ZL,Teng, HH . 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,&Teng, HH .(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.
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