Numerical investigation of cavitating flow behind the cone of a poppet valve in water hydraulic system |
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| Authors: | Gao Hong Fu Xin Yang Hua-yong Tsukiji Tetsuhiro |
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| Institution: | (1) State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, 310027 Hangzhou, China;(2) Department of mechanical engineering, Sophia University, Tokyo, Japan |
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| Abstract: | Computational Fluid Dynamics (CFD) simulations of cavitating flow through water hydraulic poppet valves were performed using
advanced RNGk-epsilon turbulence model. The flow was turbulent, incompressible and unsteady, for Reynolds numbers greater than 43000. The
working fluid was water, and the structure of the valve was simplified as a two dimensional axisymmetric geometrical model.
Flow field visualization was numerically achieved. The effects of inlet velocity, outlet pressure, opening size as well as
poppet angle on cavitation intensity in the poppet valve were numerically investigated. Experimental flow visualization was
conducted to capture cavitation images near the orifice in the poppet valve with 30° poppet angle using high speed video camera.
The binary cavitating flow field distribution obtained from digital processing of the original cavitation image showed a good
agreement with the numerical result.
Project supported by the National Natural Science Foundation of China (No. 59835160) and Scientific Research Foundation for
Returned Overseas Chinese Scholars, State Education Ministry of China (No. 50175097) |
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| Keywords: | Water Hydraulic poppet valve Cavitating flow field Numerical simulation |
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