1984 Volume 27 Issue 233 Pages 2421-2429
A mathematical model capable of predicting a pressure rise associated with cavity collapse and cavitation duration following a column separation with accuracy enough for practical usage, on the downstream side of a valve instantaneously closed in a fluid power pipeline, was investigated. Particular attention has been paid to assessing the effect of gas released from liquid during the growing phase of the cavity. For that purpose, mechanism of commencement, growth and collapse of gas bubbles and volume of gas released were observed by using a valve made of transparent acrylic resin and a high speed camera. So far as the timing and pressure peak upon collapse of the first cavity are concerned, the predicted results from the present "gas-nonbubbly flow" model, in which the effects of gas released at the separated cavity and of an unsteady shear resistance in pipe flow were considered, agreed with the measured results within 5 per cent at worst.
JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing
JSME International Journal Series B Fluids and Thermal Engineering
JSME International Journal Series A Solid Mechanics and Material Engineering
JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing
JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry
JSME international journal. Ser. A, Mechanics and material engineering
JSME international journal. Ser. 1, Solid mechanics, strength of materials