| 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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| Source Publication | SCIENCE CHINA-TECHNOLOGICAL SCIENCES
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| 2016 | |
| Volume | 59Issue:7Pages:1120-1129 |
| ISSN | 1674-7321 |
| Abstract | 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. |
| Keyword | Hypersonic Flow Aerodynamic Heating Thermal Protection System Forward-facing Cavity |
| DOI | 10.1007/s11431-016-6015-4 |
| URL | 查看原文 |
| Indexed By | SCI ; EI ; CSCD |
| Language | 英语 |
| WOS ID | WOS:000379042600016 |
| WOS Keyword | hypersonic flow ; aerodynamic heating ; thermal protection system ; forward-facing cavity |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Multidisciplinary ; Materials Science, Multidisciplinary |
| Funding Organization | This work was supported by the National Natural Science Foundation of China (Grant No. 11532014). |
| Department | LHD激波与爆轰物理 |
| Classification | 二类 |
| Ranking | True |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/59579 |
| Collection | 高温气体动力学国家重点实验室 |
| Corresponding Author | Hu, ZM (reprint author), Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China. |
| Recommended Citation 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. |
| 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. |
| 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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| a2016-173.pdf（2496KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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