Numerical Investigation of Hypersonic Boundary-Layer Stabilization by Porous Surfaces
Numerical Investigation of Hypersonic Boundary-Layer Stabilization by Porous Surfaces
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DOI：
10.2514/1.j051355
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发表时间：
2012-06
期刊：
影响因子：
2.5
通讯作者：
V. Wartemann;H. Lüdeke;N. Sandham
中科院分区：
文献类型：
--
作者：
V. Wartemann;H. Lüdeke;N. Sandham
对不同多孔壁面的高超声速绕流，将线性稳定性理论预测的声学二阶不稳定性与直接数值模拟进行了比较。通过两种不同方法的比较，显示了微孔对第二模式的阻尼效果。除了研究孔径的影响，孔形状的影响进行了研究，通过使用展向槽和圆柱形孔。具体分析了两种水力直径定义下不同孔隙形状的相似性。稀薄气体的行为的影响，孔隙内的流动也进行了研究，通过比较滑动边界条件与有限的努森数与非滑动边界条件不同的半径和孔隙深度。
The acoustic second-mode instability predicted by linear stability theory is compared with direct numerical simulation for a hypersonic flow over various porous walls. The damping effect of the micropores on the second mode is shown by comparison of the two different approaches. In addition to investigating the effect of pore size, the influence of the pore shape is studied by using spanwise grooves and cylindrical pores. Specifically, the comparability of different pore shapes by two definitions of hydraulic diameter is analyzed. The influence of rarefied gas behavior of the flow inside the pores is also investigated by comparing a slip boundary condition with finite Knudsen numbers with a nonslip boundary condition for different radii and pore depths.