STATISTICAL ANALYSIS OF NONLINEAR PROCESSES ON A POROUS SURFACE IN A HYPERSONIC BOUNDARY LAYER

Read more Experimental investigation of nonlinear stage of the transition to turbulence in a hypersonic boundary layer is presented. The experiments were carried out in a hypersonic wind tunnel T-326 at the Institute of theoretical and applied mechanics SB RAS. The model was a sharp cone with porous surface. Using the statistical analysis of the signals obtained by means of hot-wire it was shown that skewness and kurtosis distribution in a boundary layer on both solid and porous surface are in a qualitative agreement. At the same time the growing of skewness and kurtosis on a porous surface was shown. Analysis of mean voltage and rms voltage pulsation profiles of the hot-wire sensors showed that there is a delay of the laminar-turbulent transition on a porous surface.

Keywords:
hypersonic flow, boundary layer stability, porous surface, nonlinear interaction, statistical analysis, skewness and kurtosis.
УДК 533.6.071.4

STATISTICAL ANALYSIS OF NONLINEAR PROCESSES ON A POROUS SURFACE IN A HYPERSONIC BOUNDARY LAYER