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Gao Hong
Lin Wanlai
Department of Aeronautical and
Astronautical Engineering,
School of Mechanical Engineering,
Shanghai Jiaotong University,
Shanghai 200030, China
Fu Xin
Yang Huayong
State Key Laboratory of Fluid Power Transmission and Control,
Zhejiang University,
Hangzhou 310027, China
Tsukiji Tetsuhiro
Department of Mechanical Engineering, Sophia University,
Tokyo 102-8554, Japan |
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Suppression of a
Cavitation
Near the Orifice of a Relief
Valve*
Abstract: The aim of this study is to suppress a cavitation near the orifice of a relief valve by changing the shape of a poppet. An experimental flow visualization technique and a numerical cavitating flow simulation, using a RNG k-e turbulence model and a cavitation model, are employed to achieve the purpose. In the flow visualization, the cavitation phenomenon near the orifice of a relief valve is observed using a transparent test valve body model and a camera. On the other hand, a three dimensional cavitating flow simulation is conducted to predict the cavitation near the orifice of a relief valve. Six types of poppets are designed by changing the shape of a traditional poppet shape, which is expected to influence the cavitating flow in an orifice. In addition, the cavitation noise of a relief valve is measured and the noise spectrum is analyzed. In conclusion, the cavitation intensity and the cavitation noise are reduced for an optimal poppet geometry obtained in the present study.
Key words:
Relief valve Cavitation flow simulation Flow visualization |