| Non-inertial computational framework for long-distance shock-driven object dynamics | |
Wang DG(王大高); Han GL(韩桂来) ; Liu MK(刘美宽); Li ZX(李宗贤)
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| Source Publication | COMPUTERS & FLUIDS
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| 2025-01 | |
| Volume | 286Pages:106474 |
| ISSN | 0045-7930 |
| Abstract | 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. |
| Keyword | Non-inertial reference Unsteady shock simulation method Fluid-motion interaction |
| DOI | 10.1016/j.compfluid.2024.106474 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001356353600001 |
| WOS Research Area | Computer Science ; Mechanics |
| WOS Subject | Computer Science, Interdisciplinary Applications ; Mechanics |
| Funding Organization | 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] |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Han GL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/97187 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.【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 2.【Wang, Dagao & Han, Guilai & Liu, Meikuan & Li, Zongxian】 Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation 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.Rp_Au:Han GL |
| 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. |
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