Home – Home – Jornals – Journal of Applied Mechanics and Technical Physics 2026 number 5

Experimental data on the interaction of weak shock waves with the sharp leading edge of a flat plate and the bow shock at a Mach number M = 2.5 are presented. Measurements are performed with a constant-resistance hot-wire anemometer. Spatial distributions of the mean mass flow rate and its fluctuations under the action of an N-wave are determined in the incoming flow, in the flow above the model, and in the boundary layer. Spectral and statistical analyses of the resulting data are performed. The experimental results show that, when an N-wave passes through the bow shock, its amplitude decreases in the flow above the plate. The statistical distributions of the fluctuation signal in the vicinity of the N-wave fronts deviate significantly from a normal distribution. Outside the N-wave, the probability density distribution of the fluctuation signal is normal. The propagation angles of the N-wave fronts are estimated. The leading front of the N-wave is found to propagate in the incoming flow at an angle of 24.9 ± 0.5°, which agrees with the results of optical measurements. The trailing front of the N-wave propagates at the Mach angle.