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尖前缘翼干扰区的壁面压力和热流率分布
Distributions of Wall Pressure and Heating Rate in Sharp Fin-Induced Shock Wave/Turbulent Boundary Layer Interactions
【摘要】 本文给出M_∞=7.8和6.72,Re=3.5×10 ̄7/m和5.4×10 ̄7/m气流绕迎角为20°、30°和35°尖前缘翼运动时,平板锥型干扰区的壁面压力和热流率分布。结果表明:(1)平板锥型干扰区的特征几何尺度与无粘激波角β_0和翼迎角α相关,而壁面压力和热流率的峰值与法向马赫数M_n相关。(2)翼面压力和热流率分布由于受拐角涡影响,前者在翼根部呈波谷状,而后者呈波峰状,影响尺度与翼前缘处来流边界层厚度有关。
【Abstract】 This paper presents the distributions of wall pressure and heating rate on the flat plate and fin surface for 20°,30° and 35°un-swept sharp fins at freestream Mach numbers of 7.8 and 6.72, unit Rey-nolds number of 3.5× 10 ̄7/m and 5.4× 10 ̄7/m.The results show that the characteristic geometry scales of the conical interaction region can be correlated with inviscid shock angleβ0 and attack angle α. The peak values of wall pressure and heating rate can be simply accounted for by Mn,the component of freestream Mach number in the direction normal to shock wave.On the fin surface there are pronounced minimum pressure and maximum heating rate near the corner, caused by a corner vortex.The upward extent of disturbance has relation to the incoming boundary layer thickness.
【Key words】 hypersonic separated flows; shock wave/turbulent bound-ary layer interaction; sharp fin; wall pressure distribution; heating rate distribution.;
- 【文献出处】 空气动力学学报 ,ACTA AERODYNAMICA SINICA , 编辑部邮箱 ,1995年04期
- 【分类号】V211
- 【被引频次】4
- 【下载频次】72