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

1991; Japan Society Mechanical Engineers; Volume: 57; Issue: 543 Linguagem: Inglês

10.1299/kikaib.57.3722

0387-5016

Eizo Urata, Yoichi Nakao,

Flow Measurement and Analysis

Among the problems in the application of the 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 treats erosion induced by a cavitating jet flowing out 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 out, forming a jet. The jet impinges to the second test piece. A nondimensional parameter defined by the ratio of the eroded mass and the impinged fluid mass is used to express the strength of the erosion. The relation between the eroded mass of each test piece and the mass of the expelled fluid is studied by statistical method. The influences of the shape of the notch and the distance between the notch and the wall upon the erosion are also discussed.