Cavitation erosion studies with Venturi and rotating disk in water.

Study is reported of the cavitation erosion behind blunt bodies with varying hydrodynamic factors of flow, such as test time, cavity length, velocity, pressure; the geometrical parameters of the system such as the size and shape of the cavitating body, its aspect ratio, and surface roughness; and the mech. properties of the materials such as d., yield strength, tensile strength, engineering strain energy, hardness, ultimate resilience, percent elongation, percent redn. in area, and elastic modulus. A study of the vol. eroded along with the hydrodynamic flow factors and the system geometrical parameters in general indicated that corrosion is very severe in a crit. zone of cavitation. This crit. zone is described by a range of values of V/l (where V = velocity of flow and l = length of the cavity). Among the correlations studied for the inverse rate of vol. eroded as a function of individual and twin mech. properties, the product of ultimate resilience and Brinell hardness showed the best correlation. 35 refs