On upstream influence in shock wave turbulent boundary layer interaction
Abstract
In shock wave turbulent boundary layer interaction, upstream influence is defined as the distance from the inviscid shock wave to where the incoming boundary layer is first disturbed. The latter position is generally taken as being where the mean wall pressure first increases above the undisturbed value. Wall pressure fluctuation measurements in two Mach 3, high Reynolds number interactions have shown that unsteadiness of the separation shock wave structure results in the instantaneous upstream influence varying over a range of values. Upstream influence as defined above is actually the maximum of this range and, at this distance upstream of the shock wave, the probability of finding the flow disturbed is correspondingly low. The minimum value of the range is the distance from the inviscid shock wave to where the incoming flow is always disturbed. In all of the cases studied the latter station was found to be just upstream of the separation point.
 Publication:

Aeronautical Journal
 Pub Date:
 October 1983
 Bibcode:
 1983AeJ....87..324D
 Keywords:

 Shock Wave Interaction;
 Turbulent Boundary Layer;
 Upstream;
 Wall Pressure;
 Boundary Layer Separation;
 Flow Measurement;
 Inviscid Flow;
 Pressure Distribution;
 Wind Tunnel Models;
 Fluid Mechanics and Heat Transfer