Compressible stability of growing boundary layers using parabolized stability equations
Compressible stability of growing boundary layers using parabolized stability equations
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DOI：
10.2514/6.1991-1636
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发表时间：
1991-06
期刊：
影响因子：
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通讯作者：
Chau-Lyan Chang;M. Malik;G. Erlebacher;M. Y. Hussaini
中科院分区：
文献类型：
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作者：
Chau-Lyan Chang;M. Malik;G. Erlebacher;M. Y. Hussaini
抛物化稳定性方程（PSE）的方法是用来研究线性和非线性可压缩稳定性的眼睛提供一个能力，边界层转捩预测在“安静”和“干扰”的环境。控制可压缩稳定性方程求解的合理抛物近似在流向。非平行流的影响进行了研究的第一和第二模式的干扰。对于第一模式类型的斜波，与平行结果的偏离比二维波更明显。马赫数为4.5的情况下的结果表明，流动的不平行性对第一模式的影响大于第二模式。扰动增长率被证明是一个强大的函数的壁正常的距离，由于无论是流动的非平行性或非线性相互作用。亚谐波和基本类型的崩溃被发现是类似的不可压缩边界层。
The parabolized stability equation (PSE) approach is employed to study linear and nonlinear compressible stability with an eye to providing a capability for boundary-layer transition prediction in both 'quiet' and 'disturbed' environments. The governing compressible stability equations are solved by a rational parabolizing approximation in the streamwise direction. Nonparallel flow effects are studied for both the first- and second-mode disturbances. For oblique waves of the first-mode type, the departure from the parallel results is more pronounced as compared to that for the two-dimensional waves. Results for the Mach 4.5 case show that flow nonparallelism has more influence on the first mode than on the second. The disturbance growth rate is shown to be a strong function of the wall-normal distance due to either flow nonparallelism or nonlinear interactions. The subharmonic and fundamental types of breakdown are found to be similar to the ones in incompressible boundary layers.