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Journal of Zhejiang University SCIENCE A 2002 Vol.3 No.4 P.395~400

http://doi.org/10.1631/jzus.2002.0395


Numerical investigation of cavitating flow behind the cone of a poppet valve in water hydraulic system


Author(s):  GAO Hong, FU Xin, YANG Hua-yong, TSUKIJI Tetsuhiro

Affiliation(s):  State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s): 

Key Words:  Water, Hydraulic poppet valve, Cavitating flow field, Numerical simulation


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GAO Hong, FU Xin, YANG Hua-yong, TSUKIJI Tetsuhiro. Numerical investigation of cavitating flow behind the cone of a poppet valve in water hydraulic system[J]. Journal of Zhejiang University Science A, 2002, 3(4): 395~400.

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J0 - Journal of Zhejiang University Science A
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DOI - 10.1631/jzus.2002.0395


Abstract: 
Computational Fluid Dynamics (CFD) simulations of cavitating flow through water hydraulic poppet valves were performed using advanced RNG k-epsilon turbulence model. The flow was turbulent, incompressible and unsteady, for Reynolds numbers greater than 43 000. 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.

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Reference

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[2] Henrik L.Sørensen, 1999. Experimental and numerical analysis of flow force compensation methods for hydraulic seat valve. In: The Sixth Scandinavian International Conference on Fluid Power Tampere, Finland, p.471-482.

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[5] Lin, J.Z. Zhou Z.X., Wu, T. et al., 2001. Research on disturbance proper ties of suspensions near the injection area of moving jet. Journal of Zhejiang University SCIENCE, 2(1):15-23.

[6] Oshima, S., 1989. An experimental study on several poppet valves with difference in shape. In: JHPS Intern. Sympo. on Fluid Power, Tokyo, p.359.

[7] Tsukiji, T., Yonezawa, Y., Ishii, Y., 1995. Flow in a three-dimensional poppet valve for oil hydraulic power applications. Transactions of the Japan Society of Mechanical Engineers, Part B, 61(583), p.998-1004.

[8] Ueno, H., Okajima, A., Tanaka, H., et al., 1994. Noise measurement and numerical simulation of oil flow in pressure control valves. JSME International Journal(Series B), 37(2), 336-341.

[9] Vaughan, N. D., Johnston, D. N., Edge, K. A., 1992. Numerical simulation of fluid flow in poppet valves. Proc. Instn. Mech. Engrs., (Part C)206:119-127.

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