Optimal Growth in Hypersonic Boundary Layers
Optimal Growth in Hypersonic Boundary Layers
复制标题
高超声速边界层的最佳增长
DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Chau
中科院分区：
文献类型：
--
作者：
P. Paredes;Meelan Choudhari;Fei Li;Chau
The linear form of the parabolized linear stability equations is used in a variational approach to extend the previous body of results for the optimal, nonmodal disturbance growth in boundary-layer flows. This paper investigates the optimal growth characteristics in the hypersonic Mach number regime without any high-enthalpy effects. The influence of wall cooling is studied, with particular emphasis on the role of the initial disturbance location and the value of the spanwise wave number that leads to the maximum energy growth up to a specified location. Unlike previous predictions that used a basic state obtained from a self-similar solution to the boundary-layer equations, mean flow solutions based on the full Navier–Stokes equations are used in select cases to help account for the viscous–inviscid interaction near the leading edge of the plate and for the weak shock wave emanating from that region. Using the full Navier–Stokes mean flow is shown to result in further reduction with Mach number in the ma...
