Erosion by High-Water-Content Fluid Flowing from a V-Notch

Abstract

Among the problems in the application of high-water-content fluid, erosion induced by a cavitating jet is an important and complex one. A high-velocity jet accompanying cavitation can be observed in hydraulic valves and hydraulic pumps. This paper reports erosion induced by a cavitating jet flowing from a triangular notch. A pair of test pieces is used in each experiment. The first test piece has a triangular notch from which the fluid flows, forming a jet which impinges on the second test piece. A nondimensional parameter defined by the ratio of the eroded mass to the impinged fluid mass is used for expressing the strength of the erosion. The relationship between the eroded mass of each test piece and the mass of the expelled fluid is studied by statistical methods. The influences of the shape of the notch and the distance between the notch and the wall upon the erosion are also discussed.