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Assessment of thermochemical models on nonequilibrium flowfield and radiation in shock-heated nitrogen

文献类型：期刊论文

作者Zhang YZ(张宇哲)2,3; Hong QZ(洪启臻)3; Wang XY(王小永)3; Yang, Chao1; Sun QH(孙泉华)2,3
刊名COMPUTERS & FLUIDS
出版日期2025-03-15
卷号289页码:17
关键词High enthalpy flow Thermochemical nonequilibrium model Vibration-dissociation coupling Nonequilibrium radiative metric
ISSN号0045-7930
DOI10.1016/j.compfluid.2024.106533
通讯作者Hong, Qizhen(hongqizhen@imech.ac.cn) ; Sun, Quanhua(qsun@imech.ac.cn)
英文摘要Numerical simulations based on various physical models are performed to study thermochemical nonequilibrium flowfield and radiation in high enthalpy shock-heated nitrogen flows and compared against available experimental shock tube data. The physical models include both the two-temperature (2T) model and the four-temperature (4T) model, each integrated with different vibration-dissociation (VD) coupling models. For Sharma and Gillespie's shock tube experiment, it is observed that the 4T model demonstrates satisfactory agreement with experimental rotational and vibrational temperatures, while the 2T results fall short of achieving comparable accuracy. When employing identical equilibrium dissociation rate coefficients and energy relaxation times, the modified Marrone-Treanor (MMT) model shows the lowest dissociation rate and the highest peak rotational temperature, which is closer to experimental data, in comparison to the Park and Marrone-Treanor (MT) models. For recent experiments conducted at the Electric-Arc Shock Tube facility (Shot 37 and Shot 40), our 4T-QSS results with the MMT model give the predictions for nonequilibrium radiative metrics closest to experimental data among the three VD models considered, although discrepancies compared to the experiments are still observed. Moreover, our investigation concludes that the influences of radiative cooling, rate coefficients of associative ionization and heavy-particle impact dissociation of N2, and predissociation of the N2(C) state on nonequilibrium radiative metrics are insignificant for these two shots. The discrepancies (persisted when incorporating various modeling options) in both nonequilibrium radiative metric and radiance versus position between the present calculations and experimental measurement indicate the necessity of employing a detailed state-to-state model and considering the shock tube-related phenomena to reproduce the experimental data.
分类号二类
WOS关键词VIBRATIONAL-RELAXATION ; DISSOCIATION ; ELECTRON ; WAVES ; N-2
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0620201] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0620401] ; China Postdoctoral Science Foundation[2022M723233] ; National Natural Science Foundation of China[12302391] ; National Natural Science Foundation of China[12202458]
WOS研究方向Computer Science ; Mechanics
语种英语
WOS记录号WOS:001399926800001
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China
其他责任者Hong, Qizhen ; Sun, Quanhua
源URL[http://dspace.imech.ac.cn/handle/311007/98183]  
专题力学研究所_高温气体动力学国家重点实验室
宽域飞行工程科学与应用中心
作者单位1.Chinese Acad Sci, Wide Range Flight Engn Sci & Applicat Ctr, Inst Mech, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
3.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Zhang YZ,Hong QZ,Wang XY,et al. Assessment of thermochemical models on nonequilibrium flowfield and radiation in shock-heated nitrogen[J]. COMPUTERS & FLUIDS,2025,289:17.
APA 张宇哲,洪启臻,王小永,Yang, Chao,&孙泉华.(2025).Assessment of thermochemical models on nonequilibrium flowfield and radiation in shock-heated nitrogen.COMPUTERS & FLUIDS,289,17.
MLA 张宇哲,et al."Assessment of thermochemical models on nonequilibrium flowfield and radiation in shock-heated nitrogen".COMPUTERS & FLUIDS 289(2025):17.

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来源：力学研究所

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