How much does thermal nonequilibrium influence the overall atomic recombination during de-excitation?

doi:10.1016/j.chemphys.2024.112220

	How much does thermal nonequilibrium influence the overall atomic recombination during de-excitation?
	Gu, Sangdi 1; Hao, Jiaao 1; Wen, ChihYung 1; Hong QZ(洪启臻)2 ; Wang Q(汪球)2
通讯作者	Gu, Sangdi(sangdi.gu@polyu.edu.hk)
发表期刊	CHEMICAL PHYSICS
	2024-04-01
卷号	580 页码:11
ISSN	0301-0104
摘要	A parametric study is carried out via state-to-state constant-volume heat bath simulations for binary mixtures of O2/O and N2/N to identify nonequilibrium de-excitation conditions where the overall atomic recombination is influenced by thermal nonequilibrium and where it is not. The most important parameter is found to be the translational temperature at which the de-excitation occurs. A low translational temperature of around 500 K is found to prevent the overall atomic recombination process from being influenced by the thermal nonequilibrium, due to the small value of KEQ making the dissociation reaction less important. At a higher translational temperature of 2000 K, the overall atomic recombination process is influenced by the thermal nonequilibrium to an extent that is comparable to that seen in the corresponding excitation conditions, due to the nonequilibriumaccelerated dissociation rate. The current results have important implications in reduced-order modelling and experimental methods.
关键词	Thermochemical nonequilibrium Atomic recombination High -enthalpy flows
DOI	10.1016/j.chemphys.2024.112220
收录类别	SCI
语种	英语
WOS记录号	WOS:001184572300001
关键词[WOS]	DISSOCIATION RATES ; VIBRATIONAL-RELAXATION ; RATE CONSTANTS ; MODELS ; AIR ; VALIDATION ; EXCITATION ; OXYGEN
WOS研究方向	Chemistry ; Physics
WOS类目	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
资助项目	Hong Kong Research Grants Council[15206522]
项目资助者	Hong Kong Research Grants Council
论文分区	Q3
力学所作者排名	3+
RpAuthor	Gu, Sangdi
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/94638
专题	高温气体动力学国家重点实验室
作者单位	1.Hong Kong Polytech Univ, Dept Aeronaut & Aviat Engn, Kowloon, Hong Kong, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Gu, Sangdi,Hao, Jiaao,Wen, ChihYung,et al. How much does thermal nonequilibrium influence the overall atomic recombination during de-excitation?[J]. CHEMICAL PHYSICS,2024,580:11.
APA	Gu, Sangdi,Hao, Jiaao,Wen, ChihYung,洪启臻,&汪球.(2024).How much does thermal nonequilibrium influence the overall atomic recombination during de-excitation?.CHEMICAL PHYSICS,580,11.
MLA	Gu, Sangdi,et al."How much does thermal nonequilibrium influence the overall atomic recombination during de-excitation?".CHEMICAL PHYSICS 580(2024):11.