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
Corresponding Author	Gu, Sangdi([email protected])
Source Publication	CHEMICAL PHYSICS
	2024-04-01
Volume	580 Pages:11
ISSN	0301-0104
Abstract	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.
Keyword	Thermochemical nonequilibrium Atomic recombination High -enthalpy flows
DOI	10.1016/j.chemphys.2024.112220
Indexed By	SCI
Language	英语
WOS ID	WOS:001184572300001
WOS Keyword	DISSOCIATION RATES ; VIBRATIONAL-RELAXATION ; RATE CONSTANTS ; MODELS ; AIR ; VALIDATION ; EXCITATION ; OXYGEN
WOS Research Area	Chemistry ; Physics
WOS Subject	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
Funding Project	Hong Kong Research Grants Council[15206522]
Funding Organization	Hong Kong Research Grants Council
Classification	Q3
Ranking	3+
Contributor	Gu, Sangdi
Citation statistics
Document Type	期刊论文
Identifier	http://dspace.imech.ac.cn/handle/311007/94638
Collection	高温气体动力学国家重点实验室
Affiliation	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
Recommended Citation 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.Rp_Au:Gu, Sangdi
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.

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