Tomographic PIV investigation of roughness-induced transition in a hypersonic boundary layer

被引：0
|
作者：
F. Avallone
Q. Ye
F. F. J. Schrijer
F. Scarano
G. Cardone
机构：
[1] University of Naples,Department of Industrial Engineering
[2] Delft University of Technology,undefined
来源：
Experiments in Fluids | 2014年 / 55卷
关键词：
Wind Tunnel; Streamwise Velocity; Roughness Element; Laminar Boundary Layer; Streamwise Vortex;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The disturbance generated by roughness elements in a hypersonic laminar boundary layer is investigated, with attention to its three-dimensional properties. The transition of the boundary layer is inspected with tomographic particle image velocimetry that is applied for the first time at Mach 7.5 inside a short duration hypersonic wind tunnel. A low aspect ratio cylindrical roughness element is installed on a flat plate, and experiments are conducted downstream of the element describing the mean velocity field and the turbulent fluctuations. Details of the experimental procedure needed to realize these measurements are discussed, along with the fluid dynamic behaviour of the perturbed hypersonic boundary layer.
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