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Citation:
　Khodayar Javadi,Mohammad Mortezazadeh Dorostkar,Ali Katal.Cavitation Passive Control on Immersed Bodies[J].Journal of Marine Science and Application,2017,(1):33-41.[doi:10.1007/s11804-017-1400-3]
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Cavitation Passive Control on Immersed Bodies

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Title:
Cavitation Passive Control on Immersed Bodies
Author(s):
Khodayar Javadi1;  Mohammad Mortezazadeh Dorostkar2;  Ali Katal2
Affilations:
Author(s):
Khodayar Javadi1;  Mohammad Mortezazadeh Dorostkar2;  Ali Katal2
1. Aerospace Engineering Department, Sharif University of Technology, Tehran, 11365-11155, Iran;
2. Building, Civil & Environmental Engineering Department, Concordia University, Montreal H3G 1M8, Canada
Keywords:
flow control; artificial cavitation bubble generator; cavitation bubble; hydrofoil passive controller; Re-entrant jet; immersed bodies
分类号:
-
DOI:
10.1007/s11804-017-1400-3
Abstract:
This paper introduces a new idea of controlling cavitation around a hydrofoil through a passive cavitation controller called artificial cavitation bubble generator (ACG). Cyclic processes, namely, growth and implosion of bubbles around an immersed body, are the main reasons for the destruction and erosion of the said body. This paper aims to create a condition in which the cavitation bubbles reach a steady-state situation and prevent the occurrence of the cyclic processes. For this purpose, the ACG is placed on the surface of an immersed body, in particular, the suction surface of a 2D hydrofoil. A simulation was performed with an implicit finite volume scheme based on a SIMPLE algorithm associated with the multiphase and cavitation model. The modified k-ε RNG turbulence model equipped with a modification of the turbulent viscosity was applied to overcome the turbulence closure problem. Numerical simulation of water flow over the hydrofoil equipped with the ACG shows that a low-pressure recirculation area is produced behind the ACG and artificially generates stationary cavitation bubbles. The location, shape, and size of this ACG are the crucial parameters in creating a proper control. Results show that the cavitation bubble is controlled well with a well-designed ACG.

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Memo

Memo:
Received date:2016-07-27;Accepted date:2016-09-27。
Corresponding author:Khodayar Javadi,Email:Kjavadi@sharif.edu
Last Update: 2017-03-25