IMECH-IR  > 高温气体动力学国家重点实验室
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.
Source PublicationSCIENCE CHINA-TECHNOLOGICAL SCIENCES
2016
Volume59Issue:7Pages:1120-1129
ISSN1674-7321
AbstractNumerical 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.
KeywordHypersonic Flow Aerodynamic Heating Thermal Protection System Forward-facing Cavity
DOI10.1007/s11431-016-6015-4
URL查看原文
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000379042600016
WOS Keywordhypersonic flow ; aerodynamic heating ; thermal protection system ; forward-facing cavity
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Multidisciplinary ; Materials Science, Multidisciplinary
Funding OrganizationThis work was supported by the National Natural Science Foundation of China (Grant No. 11532014).
DepartmentLHD激波与爆轰物理
Classification二类
RankingTrue
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59579
Collection高温气体动力学国家重点实验室
Corresponding AuthorHu, 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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