A Nonlinear Design Theory and Method for Supercavitating Cascades,

摘要

A nonlinear method for finding two-dimensional supercavitating sections in a cascade is developed. The load distribution is taken from linear theory for low-drag supercavitating foils in a cascade. The double spiral vortex model is used for cavity termination. Linear and nonlinear theories are compared with special emphasis put on analyzing the blunt leading edge. The foil cavity shape,cavity drag,and cavitation number can be obtained by a computer program,when the cavity length and geometrical parameters of the cascade are given.