Some Experiments With Two-Dimensional Cavitating Venturis

Abstract

CA V I T A T I N G Venturis have been used as flow control devices. The purpose of the experimental work reported in this paper was to s tudy the effect of geometry on ventur i operation and also to explore the capabilities and potentialities of Venturis as flow controllers. Wate r was used in all tests . The investigations can be conveniently subdivided into three phases: Phase 1 consists of obtaining the pressure distr ibution along a ventur i as a function of geometry. Phase 2 consists of high speed photographic studies of the cavitation profile. Phase 3 consists of tes ts in which fluid is injected into various points of the ventur i . Two different methods were tr ied: In the so-called "closed loop sys tem" some fluid was withdrawn from a point in the ventur i and injected into another. In the other, which shall be called "external injection," fluid was injected from an external pressurized source into some point of the venturi .