Volume 7, 2015Progress in Flight Physics – Volume 7
|Page(s)||509 - 524|
|Section||Stability and transition|
|Published online||08 June 2015|
On the relative “receptivity” of twoand three-dimensional supersonic boundary layers to stationary disturbances at mach 2
Khristianovich Institute of Theoretical and Applied Mechanics Siberian Branch of the Russian Academy of Sciences 4/1 Institutskaya Str., Novosibirsk 630000, Russia
Experiments on the influence of flat isolated square and diamond shaped roughness elements on the mean and pulsation characteristics of the boundary layer on a flat plate and a swept wing of comparable size are conducted. The shape of stickers has almost no effect on the mass flow pulsation amplitude in the trace of roughness. The relative “receptivity” of the three-dimensional (3D) boundary layer to stationary perturbations is approximately 1.5 times greater than the “receptivity” of the twodimensional (2D) boundary layer. The presence of roughness on the disturbance source line changes the pulsation spectra in 2D/3D boundary layer compared to the spectra in boundary layer on smooth surface.
© Owned by the authors, published by EDP Sciences, 2015