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Study of the Stagnation-Point Boundary Layer in Hypersonic Magnetohydrodynamic Flows

文献类型：期刊论文

作者Luo K(罗凯)2; Wang Q(汪球)2; Li DY(李丹阳)1,2; Li JP(李进平)2; Zhao W(赵伟)1,2
刊名AIAA JOURNAL
出版日期2025-09-05
页码13
关键词Stagnation Pressure Heat Flux Shock Layers Skin Friction Stagnation Streamlines Freestream Conditions Stagnation Point Boundary Layers Magnetohydrodynamic Flows Saturation Effect
ISSN号0001-1452
DOI10.2514/1.J064932
通讯作者Wang, Qiu(wangqiu@imech.ac.cn)
英文摘要To investigate the effect of a magnetic field on the stagnation-point boundary layer in hypersonic flows, this study developed a magnetohydrodynamic boundary-layer model that incorporates real gas effects. Variations in the boundary layer, including stagnation-point heat flux, heat transfer function, and skin friction function, were examined to elucidate the mechanisms associated with different boundary-layer-edge conditions. Parameters at the boundary-layer edge were obtained using the quasi-one-dimensional stagnation streamline method. The results indicate that the nonequilibrium state at the boundary-layer edge has minimal impact on the inner boundary layer. In contrast, the magnetic strength reduces convective heat transfer primarily by decreasing the velocity gradient at the boundary-layer edge. The enhancement of the heat transfer function is mainly driven by the "acceleration effect" on the flow within the boundary layer, resulting from decreased velocity gradients and increased Lorentz force. This interaction ultimately leads to a saturation effect in the reduction of heat transfer. Additionally, the increase in the skin friction function is primarily due to velocity overshoot within the boundary layer induced by the magnetic field. The Lorentz force induced by the magnetic field expands the inviscid shock layer while simultaneously reducing the boundary-layer thickness. Overall, the stagnation-point boundary-layer model developed in this study not only facilitates rapid assessment of stagnation parameters, but also deepens our understanding of the magnetic field's role within the stagnation-point boundary layer.
分类号一类/力学重要期刊
WOS关键词MAGNETIC-FIELD ; HEAT-TRANSFER ; BLUNT-BODY ; NONEQUILIBRIUM
资助项目Youth Innovation Promotion Association of the Chinese Academy of Scienceshttp://dx.doi.org/10.13039/501100004739[12402331] ; Youth Innovation Promotion Association of the Chinese Academy of Scienceshttp://dx.doi.org/10.13039/501100004739[12072352] ; Youth Innovation Promotion Association of the Chinese Academy of Scienceshttp://dx.doi.org/10.13039/501100004739[12232018] ; National Natural Science Foundation of China[XDB 0620203] ; Strategic Priority Research Program of the Chinese Academy of Sciences[2021020] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
WOS研究方向Engineering
语种英语
WOS记录号WOS:001566059300001
资助机构Youth Innovation Promotion Association of the Chinese Academy of Scienceshttp://dx.doi.org/10.13039/501100004739 ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
其他责任者汪球
源URL[http://dspace.imech.ac.cn/handle/311007/103677]  
专题力学研究所_高温气体动力学国家重点实验室
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Luo K,Wang Q,Li DY,et al. Study of the Stagnation-Point Boundary Layer in Hypersonic Magnetohydrodynamic Flows[J]. AIAA JOURNAL,2025:13.
APA 罗凯,汪球,李丹阳,李进平,&赵伟.(2025).Study of the Stagnation-Point Boundary Layer in Hypersonic Magnetohydrodynamic Flows.AIAA JOURNAL,13.
MLA 罗凯,et al."Study of the Stagnation-Point Boundary Layer in Hypersonic Magnetohydrodynamic Flows".AIAA JOURNAL (2025):13.

入库方式： OAI收割

来源：力学研究所

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