CHARACTERISTICS OF FLOW THROUGH THROTTLING VALVE UNDERGOING A STEEP PRESSURE GRADIENT

Authors

  • Xin Fu State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
  • Xuewen Du State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
  • Jun Zou State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
  • Hong Ji School of Fluid Power & Control Engineering, Lanzhou University of Technology, Lanzhou 730050, China
  • Shohei Ryu Technical Research Laboratory, Hitachi Construction Machinery Co. Ltd. Tsuchiura. Ibaraki. Japan
  • Masami Ochiai Technical Research Laboratory, Hitachi Construction Machinery Co. Ltd. Tsuchiura. Ibaraki. Japan

Keywords:

pressure distribution, CFD, valve, cavitation, noise

Abstract

This paper presents predictions and measurements of the structures of cavitation flow inside the throttling valve. The three-dimensional Navier-Stokes equations in a moving reference frame are solved on tetrahedral meshes. A sliding mesh technique is utilized to characterize unsteady interactions. The accuracy of the predicted flow fields is evaluated by comparison to measurement results taken with a high-speed camera. Results show that the pressure distribution inside the throttling groove is sensitive to the valve port configuration and flow direction. Bubbles form near the side wall of the groove on the throttling edge where, in the case of flow into the throttling groove, the pressure is at a minimum. With the increase of the pressure gradient bubbles saturate the flow. Noise spectrum analysis indicates that the noise level induced by cavitation is determined by the number and size of the bubbles passing through the valve grooves.

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Author Biographies

Xin Fu, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

Xin Fu Born in 1961, he is a Prof. Dr. in the Mechatronic Department within the Mechanical Engineering college at Zhejiang University, P. R. China. He is also the Director of the State Key Lab of Fluid Power Transmission and Control at Zhejiang University. His main research areas are computation fluid dynamics in hydraulic components, fluid power transmission, MEMS and vibration/noise control in hydraulic valves. He has published more than 100 papers in technical journals and at international conferences.

Xuewen Du, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

Xuewen Du Born in June, 1978, he received his M. Sc from Gaungxi University (China) in 2004. He is currently a graduate student pursuing a doctoral degree at the State Key Lab of Fluid Power Transmission and Control at Zhejiang University. His primary research fields are fluid visualization in hydraulic components and fluid noise control.

Jun Zou, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

Zou Jun Born in July, 1977, he received his PhD from the Zhejiang University (China) in 2006. He is currently a researcher at the State Key Lab of Fluid Power Transmission and Control at Zhejiang University. His primary research is electrohydraulic servo systems.

Hong Ji, School of Fluid Power & Control Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Hong Ji Born in 1972, he received his PhD from Zhejiang University in 2005 and is currently an associate Prof. at Lanzhou University of Technology, P.R. China. His main research fields are fluid noise and vibration control, motor-pump and mobile hydraulics. He has published more than 20 papers. At present, his research is supported by Nature Science Foundation of China and Nature Science Foundation of Gansu Province.

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Published

2007-08-01

How to Cite

Fu, X., Du, X., Zou, J., Ji, H., Ryu, S., & Ochiai, M. (2007). CHARACTERISTICS OF FLOW THROUGH THROTTLING VALVE UNDERGOING A STEEP PRESSURE GRADIENT. International Journal of Fluid Power, 8(1), 29–37. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/545

Issue

2007: Vol 08 Iss 1

Section

Original Article

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