Theoretical and experimental investigation of cavitation number limits

Abstract

Cavitation remains a popular field of scientific research due to the generated effects and a wide range of possible applications. At the same time, despite the active development of technologies for treatment of liquid materials by cavitation action, the equipment used for initiation of cavitation action has not fundamentally changed. In this regard, the main direction of development of efficiency of technological processes based on cavitation impact should be the search for ways to improve the efficiency of existing equipment, which will form the basis for the development of new types of devices. For development of devices it is necessary to understand how to increase the efficiency of created cavitation in various devices. To date, in the analysis of the degree of intensity and the threshold of creation of cavitation is used dimensionless cavitation number, which due to a number of limitations is not able to fully reflect all the parameters of the process of creation of hydrodynamic cavitation. In this paper we present a theoretical and experimental study using two types of hydrodynamic cavitation generators, to assess the limitations of the dimensionless cavitation number.