Quadrant analysis in a heated-wall supersonic boundary layer

Quadrant analysis was performed with instantaneous velocities measured by laser Doppler velocimetry in a zero pressure gradient supersonic turbulent boundary layer on an adiabatic or heated plate. The distributions obtained were close to those for subsonic flows, and were not modified by the wall heating. Moreover, this heating made it possible to extend the analysis to a part of the buffer layer that is characteristic of the turbulence process (y+∼15). This led to a differentiation between the effects of Reynolds and Mach numbers in the various regions of the boundary layer.