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Aerothermal characteristics of bleed slot in hypersonic flows
Yue LJ(岳连捷); Lu HB; Xu X; Chang XY; Yue, LJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
AbstractTwo types of flow configurations with bleed in two-dimensional hypersonic flows are numerically examined to investigate their aerodynamic thermal loads and related flow structures at choked conditions. One is a turbulent boundary layer flow without shock impingement where the effects of the slot angle are discussed, and the other is shock wave boundary layer interactions where the effects of slot angle and slot location relative to shock impingement point are surveyed. A key separation is induced by bleed barrier shock on the upstream slot wall, resulting in a localized maximum heat flux at the reattachment point. For slanted slots, the dominating flow patterns are not much affected by the change in slot angle, but vary dramatically with slot location relative to the shock impingement point. Different flow structures are found in the case of normal slot, such as a flow pattern similar to typical Laval nozzle flow, the largest separation bubble which is almost independent of the shock position. Its larger detached distance results in 20% lower stagnation heat flux on the downstream slot corner, but with much wider area suffering from severe thermal loads. In spite of the complexity of the flow patterns, it is clearly revealed that the heat flux generally rises with the slot location moving downstream, and an increase in slot angle from 20 to 40 reduces 50% the heat flux peak at the reattachment point in the slot passage. The results further indicate that the bleed does not raise the heat flux around the slot for all cases except for the area around the downstream slot corner. Among all bleed configurations, the slot angle of 40 located slightly upstream of the incident shock is regarded as the best.
KeywordBoundary Layer Control Boundary Layer Heat Flow Shock Wave Interactions Separated Flows
Indexed BySCI ; EI ; CSCD
WOS IDWOS:000361783300007
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
Funding OrganizationThis work was supported by the National Natural Science Foundation of China (Grant Nos. 91216115 and 11472279).
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorYue, LJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Yue LJ,Lu HB,Xu X,et al. Aerothermal characteristics of bleed slot in hypersonic flows[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2015,58(10):104703.
APA 岳连捷,Lu HB,Xu X,Chang XY,&Yue, LJ .(2015).Aerothermal characteristics of bleed slot in hypersonic flows.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,58(10),104703.
MLA 岳连捷,et al."Aerothermal characteristics of bleed slot in hypersonic flows".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 58.10(2015):104703.
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