The limits of operation modes for apparatuses with cavitation excitation

Abstract

Cavitation in the chamber of a rotor apparatus with flow modulation was considered. A method was proposed for determining the limits of precavitation and cavitation, cavitation and supercavitation operation modes for apparatuses with pulsed cavitation excitation as a key factor of production process stimulation. The experimental dependence of the critical cavitation number on the excess liquid pressure in the chamber of a rotor apparatus was given and showed an insignificant hysteresis of the critical cavitation number. The dependences of the amplitude of the first cavitation pressure pulse on the generalized cavitation number at different rotor apparatus modulator shuttering rates and temperatures of water (up to 99°C) flowing through one stator hole and of the integrated cavitation noise pressure on the excess liquid pressure (up to 2 MPa) in the chamber of a modified rotor apparatus at constant volumetric flow rates (up to 27 m3/h) were also reported.