Investigation of the Disk Cavitator Cavitating Flow Characteristics under Relatively High Cavitation Number

Abstract:

Simulations on two-phase cavitating flows containing water and vapor, on axisymmetric body with disk cavitator have been implemented through the cavitation model in Fluent 6.2, the flow field around cavitator under different incoming conditions is studied respectively, and analyses to parameters pertinent to cavity including dimension, streamlines, vapor volume fractions and pressure distributions along the body surface are given when the incoming cavitation number ranges from 0.3 to 0.8, the results show that the vapor volume fraction and threshold phase-change pressure within the cavity under the same cavitation number gradually ascends as the Reynolds number increases ; the effects of incoming pressure on threshold phase-change pressure inside the cavity is insignificant.

• Periodical: Applied Mechanics and Materials (Volumes 29-32)
• Pages: 2555-2562
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.29-32.2555
• Online since: August 2010
• Authors: Xiao Hu, Ye Gao
• Keywords: Cavitating Flow, Disk Cavitator, Pressure, Reynolds Number, Velocity

References

[1] QUAN Xiao-bo, WEI Hai-peng, KONG De-cai, et al: Numerical Simulation on Cavitation of Submarine Launched Missile's Surface at Large Angles of Attack, Journal of Astronautics, Vol. 29 (2008), pp.1701-1705.

[2] WEI Hai-peng, GUO Feng-mei, QUAN Xiao-bo: Research on Cavitation of Submarine Launched Missile's Surface, Journal of Astronautics, Vol. 28 (2007), pp.1506-1509.

[3] Chen Xin: An Investigation of The Ventilated Cavitating Flow", Doctoral Dissertation for a doctor, s degree, School of Naval Architecture, Ocean and Civil Engineering, ShangHai JiaoTong University 2006, 152 p.

[4] LIU Yu-qiu, ZHANG Jia-zhong, YU Kai-ping, et al: Experimental analysis and numerical simulated research of the supercavitating body drag, Journal of Harbin Engineering University, Vol. 27 (2006), pp.335-338.

[5] Singhal A K, Athavale M M, et al: Mathematical basis and validation of the full cavitation model, ASME J. Fluids Engineering, Vol. 24 (2002), pp.618-624.

DOI: 10.1115/1.1486223

[6] YANG Wu-gang, ZHANG Yu-wen, KAN Lei: Numerical Research on the Ventilation Parameters of Underwater Supercavitating High Speed Vehicle, Journal of Astronautics, Vol. 27 (2007), pp.198-200.

[7] Rouse H, Mc Nown J. S: Cavitation and pressure distribution, head forms at zero angle of yaw,. Iowa Institute of Hydraulic Research, State University of Iowa, Iowa City(1948).

DOI: 10.17077/006207

[8] Patankar, S. V: �umerical heat transfer and fluid flow (Hemisphere Publications, Washington, D.C. 1980).

[9] Launder, B. E. and Spalding, D. B.: The numerical computation of turbulent flows, Computer Methods in Applied Mechanics and Engineering, Vol. 3 (1974), pp.198-200.

DOI: 10.1016/0045-7825(74)90029-2

[10] Michel.J. M: Introduction to Cavitation and Supercavity, Proceedings: RTO. AVT Lecture Series on supercavitating flows. February 12-16(2001), 11-27.