Experimental and Numerical Investigation of the Cavitation-Induced Suction Effect

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Resumo

The generation of the suction force between a rigid cylindrical frame constricting a submerged cavitating jet and a solid surface is considered. The separation force needed to overcome the suction effect is experimentally determined in a specially developed setup. The dependences of the suction force on the frame diameter and the distance from the nozzle cavitator are obtained using numerical modeling. The volume fraction of the vapor phase inside the frame and the static pressure along the suction surface are calculated. The mechanism of the appearance of the effect and the criteria of its vanishing are explained on the basis of the data obtained.

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Sobre autores

A. Ukolov

Kerch State Naval Technological University

Autor responsável pela correspondência
Email: ukolov_aleksei@mail.ru
Rússia, Kerch, 298309

V. Rodionov

Kerch State Naval Technological University

Email: vik-rodio@yandex.ru
Rússia, Kerch, 298309

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2. Fig. 1. Installation for studying the suction force of the device to the surface (a) and a scheme for creating a cavitating jet in a confined space (b).

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3. Fig. 2. Geometry and dimensions of the modeling area (a); verification of the independence of the results from the cell size (b).

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4. 3. Experimental (a) and numerical (b) dependence of the separation force Fw on the distance h for different diameter values of the cylindrical body d1.

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5. Fig. 4. Dependence of the separation force Fw on the distance x (a) and the inlet pressure P0 (b) at different values of the diameter of the cylindrical body d1.

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6. Fig. 5. Photo of the outflow of a jet cavitation submerged stream from the cavitator nozzle to the surface (a); distribution of the volume fraction of the vapor phase inside the device body (b).

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7. 6. The dependence of the static pressure P on the y coordinate for different values of the distance h.

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