Impact of incident Mach wave on supersonic boundary layer

The evolution of mass flow and total temperature pulsations in flat plate boundary layer at M=2.5

“…The disturbances with known initial characteristics are artificially introduced into the flow. The study of the evolution of artificial controlled perturbations allows one to find out the wave characteristics of the boundary layer [1][2][3][4][5][6]. Experiments with the controlled pulsations are very important and play a vital role in validating theoretical results.…”

Visualization of interaction of Mach waves with a bow shock

“…In model experiments the height of 2D roughness was 0.01 and its length (along the flow) was 1 of wall boundary layer thickness. Hot-wire measurements revealed profile of the waves to be similar to Nwave [3][4][5][6].…”

“…The scenario brings peculiarities in the process of turbulence appearing and development in boundary layers, and is not described in details at the moment [1]. In experiments [2][3][4] the situation was modeled by using two-dimensional roughness which was placed either on the side walls of working section or on the nozzle inset.…”

Experimental investigation of localized disturbances in the straight wing boundary layer, generated by finite surface vibrations

“…In papers [1][2][3][4] for supersonic and subsonic oncoming flow velocities, such investigations were carried out on the excitation of longitudinal structures and controlled wave packets in the boundary layer. This method makes it possible detailed investigations of characteristics for artificially introduced perturbations with saving of phase information, to trace the dynamics of the development of a concrete perturbation at all its stages.…”