EXPERIMENTAL INVESTIGATION OF SUPERCAVITATION FLOW REGIMES AT SUBSONIC AND TRANSONIC SPEEDS

Abstract

Procedure and results of experimental investigations of hydrodynamics of bodies moving in water in supercavitating flow regime at velocities from several tens and hundreds meters per second up to velocities compared with sound speed in water a = 1430 m/sec are stated. Results of registering the parameters of stationary vapor and ventilated supercavities at motion velocities in water V ≈ 30 ÷ 140 m/c are given. Qualitative features of the high-speed supercavities are described, the water compressibility effects in the zone in front of the cavitator are registered at motion regimes with Mach numbers in the range M = 0.54 ÷ 0.77. The empirical formula to calculate the shape and dimensions of axisymmetric supercavities is obtained. It is valid in the velocity range V ≈ 40 ÷ 1300 m/c.