Non-inertial computational framework for long-distance shock-driven object dynamics
文献类型：期刊论文
| 作者 | Wang DG(王大高); Han GL(韩桂来) ; Liu MK(刘美宽); Li ZX(李宗贤)
|
| 刊名 | COMPUTERS & FLUIDS
 |
| 出版日期 | 2025-01 |
| 卷号 | 286页码:106474 |
| 关键词 | Non-inertial reference Unsteady shock simulation method Fluid-motion interaction |
| ISSN号 | 0045-7930 |
| DOI | 10.1016/j.compfluid.2024.106474 |
| 英文摘要 | In the realm of dynamic separation problems, the motion of a body triggered by shock interactions is a common phenomenon. This is particularly important in terms of the safe separation of two-stage-to-orbit vehicles, where the motion must remain stable despite long-distance disturbances from shock waves. The flow field in these cases is complex, marked by interactions between hypersonic shock waves and a moving boundary. This leads to significant unsteady effects due to the body's translation and rotation over extended distances. Existing simulation techniques fall short in rapidly and accurately predicting the aerodynamic force and thermal properties for these problems, largely due to the overwhelming computational demands that result from oversize computational domains and the necessity of grid deformation. This paper presents a novel non-deforming grid method to address these challenges. The central concept is to anchor the reference frame to the moving object itself and to approach the problem from a non-inertial frame perspective. This accounts for the motion of the object solely via the inertial source term, circumventing the complexities of mesh manipulation typically required to link flow and motion equations. The moving shock boundary is designed to be closely compatible with selected shock-captured schemes, which reduces non-physical oscillations compared to the traditional method of direct assembly with theoretical shock relations. Other boundary conditions and the solution process are also refined to specifically target the unsteady, shock-dominated flow. These modifications significantly alleviate the computational burden. The effectiveness of the proposed method is demonstrated through several test cases. To showcase the method's practical application, a scenario is simulated wherein an ellipse is dislodged from a wedge by an incident shock wave, covering a long distance. These tests confirm the method's feasibility in aerospace engineering problems. |
| 分类号 | 二类 |
| WOS研究方向 | Computer Science ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001356353600001 |
| 资助机构 | National Natural Science Foundation of China {12132017] ; National Key Research and Development Program of China {2022YFB3207000] ; Youth Cross Team CAS {JCTD-2022-02] ; Youth Innovation Promotion Association CAS {2020019] |
| 其他责任者 | Han GL |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/97187]  |
| 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.【Wang, Dagao & Han, Guilai & Liu, Meikuan & Li, Zongxian】 Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.【Wang, Dagao & Han, Guilai & Liu, Meikuan & Li, Zongxian】 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 | Wang DG,Han GL,Liu MK,et al. Non-inertial computational framework for long-distance shock-driven object dynamics[J]. COMPUTERS & FLUIDS,2025,286:106474. |
| APA | 王大高,韩桂来,刘美宽,&李宗贤.(2025).Non-inertial computational framework for long-distance shock-driven object dynamics.COMPUTERS & FLUIDS,286,106474. |
| MLA | 王大高,et al."Non-inertial computational framework for long-distance shock-driven object dynamics".COMPUTERS & FLUIDS 286(2025):106474. |
入库方式： OAI收割
来源：力学研究所
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