Unsteady combustion mode with a super-high frequency induced by a curved shock

doi:10.1063/5.0026746

	Unsteady combustion mode with a super-high frequency induced by a curved shock
	Teng HH(滕宏辉); Liu S ; Zhang ZJ(张子健)
发表期刊	PHYSICS OF FLUIDS
	2020-11-01
卷号	32 期号:11 页码:116101
ISSN	1070-6631
摘要	Previous studies of a high-speed blunt projectile in a combustible mixture found two oscillating unsteady combustion modes induced by the curved shock, referred to as high- and low-frequency modes. A new unsteady combustion mode is observed in the present study. The frequency reaches approximately twice the high frequency and is referred to as the super-high frequency to maintain consistency with the terminology used in previous works. The super-high-frequency mode appears in cases of a small sphere diameter, and with a proper diameter, an intermediate mode arises with the co-existence of both high and the super-high frequencies. An analysis of pressure and temperature gradients along the stagnation streamline attributes the oscillation of combustion to the interaction of compression and entropy waves between the shock and flame front. If the compression/entropy waves affect the flame front of the next cycle, the high-frequency mode arises; this is consistent with the results of previous works. However, weakened compression/entropy waves in cases of a small sphere diameter only affect the flame front of every other cycle, leading to the super-high-frequency mode.
关键词	PROJECTILE MECHANISM SYSTEMS
DOI	10.1063/5.0026746
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000589620100001
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
项目资助者	National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [11822202}
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Zhang, ZJ
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85431
专题	高温气体动力学国家重点实验室
作者单位	1.{Teng Honghui, Liu Shuai} Beijing Inst Technol Sch Aerosp Engn Beijing 100081 Peoples R China 2.{Zhang Zijian} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China 3.{Zhang Zijian} Chinese Acad Sci Inst Mech Beijing 100190 Peoples R China
推荐引用方式 GB/T 7714	Teng HH,Liu S,Zhang ZJ. Unsteady combustion mode with a super-high frequency induced by a curved shock[J]. PHYSICS OF FLUIDS,2020,32,11,:116101.
APA	滕宏辉,Liu S,&张子健.(2020).Unsteady combustion mode with a super-high frequency induced by a curved shock.PHYSICS OF FLUIDS,32(11),116101.
MLA	滕宏辉,et al."Unsteady combustion mode with a super-high frequency induced by a curved shock".PHYSICS OF FLUIDS 32.11(2020):116101.

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