| Numerical investigation on the thermal protection mechanism for blunt body with forward-facing cavity |
| Li, XD ; Hu ZM(胡宗民); Jiang ZL(姜宗林); Hu, ZM (reprint author), Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China.
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| 发表期刊 | SCIENCE CHINA-TECHNOLOGICAL SCIENCES
 |
| 2016
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| 卷号 | 59期号:7页码:1120-1129 |
| ISSN | 1674-7321
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| 摘要 | Numerical experiments are carried out using the standard hypersonic ballistic-type model (HB-2) to investigate the effect of forward-facing cavity on the aerodynamic heating. A general concept is proposed which utilizes the flow disturbances generated passively in the nosed subsonic region to weaken the detached shock wave. Several aspects are mainly studied, including shock shape and standoff distance, surface heat flux and pressure, flowfield feature and cooling mechanism. The numerical results indicate that shock strength and standoff distance increase with an increase in the L/D ratio of the cavity. Interestingly, a bulge structure of the detached shock associated with a deep cavity is observed for the first time. Local surface heat flux and pressure around the concave nose are much lower respectively than those at the stagnation point of the baseline model. In addition, both surface heat and pressure reductions are proportional to the L/D ratio. A negative heating phenomenon may occur in the vicinity of a sharp lip or on the base wall of a deep cavity. If the L/D ratio exceeds 0.7, the detached shock appears as a self-sustained oscillation which can be referred to as the cooling mechanism. |
| 关键词 | Hypersonic Flow
Aerodynamic Heating
Thermal Protection System
Forward-facing Cavity
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| DOI | 10.1007/s11431-016-6015-4
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| URL | 查看原文
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| 收录类别 | SCI
; EI
; CSCD
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| 语种 | 英语
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| WOS记录号 | WOS:000379042600016
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| 关键词[WOS] | hypersonic flow
; aerodynamic heating
; thermal protection system
; forward-facing cavity
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| WOS研究方向 | Engineering
; Materials Science
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| WOS类目 | Engineering, Multidisciplinary
; Materials Science, Multidisciplinary
|
| 项目资助者 | This work was supported by the National Natural Science Foundation of China (Grant No. 11532014).
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| 课题组名称 | LHD激波与爆轰物理
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| 论文分区 | 二类
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| 力学所作者排名 | True
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/59579
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| 专题 | 高温气体动力学国家重点实验室
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| 通讯作者 | Hu, ZM (reprint author), 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 |
Li, XD,Hu ZM,Jiang ZL,et al. Numerical investigation on the thermal protection mechanism for blunt body with forward-facing cavity[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2016,59,7,:1120-1129.
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| APA |
Li, XD,胡宗民,姜宗林,&Hu, ZM .(2016).Numerical investigation on the thermal protection mechanism for blunt body with forward-facing cavity.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,59(7),1120-1129.
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| MLA |
Li, XD,et al."Numerical investigation on the thermal protection mechanism for blunt body with forward-facing cavity".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 59.7(2016):1120-1129.
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