Research on the Effects of Pulse-Pressure on Orifice Plate Cavications

Abstract:

The flows sudden-shrink and sudden-enlarge when passing orifice plate and streamlines dramatically changes. All these lead to flow velocitys pulse, which leads to pressures pulse. The pressures pulse of flow in the vicinity of orifice plate is decided by orifices geometry. The characteristics of flow pressure pulse in the vicinity of orifice plate and its effects on cavications characteristics are researched in this paper. The researches results show that flow pressures pulse around orifice plate have two peak values: one is at the front of orifice; the other is at the vicinity of waters reattachment point, the latters pulse amplitude is larger than the formers. The pressures pulse has important effects on orifice plates cavications. When computing orifices cavitations number, the effects of pulse-pressure should be considered.

• Periodical: Applied Mechanics and Materials (Volume 327)
• Pages: 267-270
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.327.267
• Online since: June 2013
• Authors: Zhi Bin Zhang, Yu Le Li, Wan Zheng Ai
• Keywords: Cavitation, Orifice Plate, Pulse-Pressure, Sudden-Enlarge, Sudden-Shrink

References

[1] Cai, J.M., Zhang Z.Y. (1994). Effects of orifice plate energy dissipators on energy dissipation of a flood discharge tunnel. Journal of Hydroelectric Engineering. 4(3), 48-56. (in Chinese)

[2] Wang, D.C., Yue, P.J. (1987). An experimental studies on energy dissipation of orifice plate in the tube. Journal of Hydrodynamics, Ser.A. 2(3), 41-50. (in Chinese)

[3] Xiang, T., Cai, J.M. (1999). Study and practice of interior energy dissipator for flood discharge tunnels. Journal of Water Conservancy and Hydropower Technology. 30(12), 69-71. (in Chinese)

[4] Neppiras, E. A. 1984. Acoustic cavitation: An introduction. Ultrasonics, 22(1), 25-28. [doi:10.1016/0041- 624X(84)90057-X]

DOI: 10.1016/0041-624x(84)90057-x

[5] Russell, S.O., Ball, J.W. (1967). Sudden-enlargement energy dissipator for Mica dam. Journal of the Hydraulics Division, ASCE. 93(4), 41-56.

DOI: 10.1061/jyceaj.0001666

[6] Hu, M. L. 1994. The influence of bubble vibration on the cavitation in turbulent shear flow, Journal of Hydrodynamics, 11(2), 182-189. (in Chinese)

[7] Yang, Q., Zhang, J. M., Dai, G. Q., Wang, H. Y., and Cui, C. L. 2004. Effects of fluctuation pressure on cavitation. Journal of Sichuan University (Engineering Science Edition), 36(4), 19-23. (in Chinese)