Experimental investigation of interactions between turbulent cylinder wake and spherical shock wave

摘要: Interactions between a spherical shock wave and turbulent cylinder wake are studied with wind tunnel experiments. The is generated outside the propagates across wake. Instantaneous streamwise velocity measured on centerline while peak overpressure of after has passed experiments performed for various conditions to investigate influences root-mean-squared (rms) fluctuation length region through which propagates. opposite propagation direction positively correlated peak-overpressure fluctuation. mean decreases in These relations explained by shock-surface deformation, where increased decreased, respectively, surfaces concave convex shapes relation direction. correlation coefficients fluctuations rms increase becomes independent ray once propagated sufficiently long region. probability density function (PDF) close Gaussian shape even though PDF negatively skewed.