Research on the Unsteady Characteristics of Ventilated Cavitating Flows in the Form of Gas-leakage by Toroidal Vortex

doi:10.3969/j.issn.1000-1093.2014.05.020

Abstract

Abstract: To understand the unsteady characteristics of ventilated cavitation in the form of gas-leakage by toroidal vortex，the ventilated cavitating flows around axisymmetric body are researched by the experimental and numerical methods. A filter-based turbulence model is used in numerical simulation in order to accurately capture the vortex separation. In experiment, the high-speed video camera is used to observe the flow structure. The results show that the numerical results are consistent with the experimental results. The unsteady ventilated cavitating flow is the shedding process of cloud bubble in the rear of ventilated cavity. Flow separation in the region of ventilated cavity is caused by adverse pressure gradient, resulting in a complex vortex structure. An interaction between vortex structure and the main flow leads to the cloud bubble shedding in the rear of ventilated cavity.

Key words: fluid mechanics, ventilated cavity, adverse pressure gradient, flow separation, bubble shedding

CLC Number:

TV131.32

DUAN Lei, WANG Guo-yu, FU Xi-neng. Research on the Unsteady Characteristics of Ventilated Cavitating Flows in the Form of Gas-leakage by Toroidal Vortex[J]. Acta Armamentarii, 2014, 35(5): 711-718.

References

［1］ Semenenko V N. Artificial supercavitation physics and calculation, ADP012080[R].Kiev: Institute of Hydeomechanics of Ukrainian Academy of Science, 2001.
[2] Kawakami E, Williams M, Arndt R. Investigation of the behavior of ventilated supercavities[C]∥7th International Symposium on Cavitation.Ann Arbor, MI: University of Michigan, 2009:16-20.
[3] Wosnik M, Schauer T J, Arndt R E A.Experimentalstudy on a ventilated supercavitating vehicle[C]∥5th International Symposium on Cavitation. Osaka, Japan: Osaka University, 2003:1-4.
[4] Schauer T. An experimental study of a ventilated supercavity vehicle[D]. Minnesota: University of Minnesota, 2003.
[5] Wosnik M, Fontecha L G, Arndt R E A. Measurements in high void-fraction bubbly wakes created by ventilated supercavitation[C]∥Proceedings of the Sixth International Symposium on Cavitation. Wageningen: MARIN, 2005: 531-538.
[6] Kinzel M P, Lindau J W, Peltier L J, et al. Detached-eddy simulations for cavitating flows[C]∥18th AIAA Computational Fluid Dynamics Conference. Miami, FL:AIAA,2007:437-450.
[7] Kinzel M P, Lindau J W, Kunz R. Air entrainment mechanisms from artificial supercavities: insight based on numerical simulations[C]∥Proceedings of the 7th International Symposium on Cavitation. Ann Arbor, Michigan, US: University of Michigan, 2009:16-20.
[8] Kinzel M P. Computational techniques and analysis of cavitating-fluid[D].Pennsylvania:The Pennsylvania State University, 2008.
[9] 陈鑫. 通气空泡流研究[D]. 上海:上海交通大学,2006.
CHEN Xin. An investigation of the ventilated cavitating flow[D]. Shanghai: Shanghai Jiao Tong University, 2006. (in Chinese)
[10] 时素果, 王国玉，余志毅，等. FBM湍流模型在非定常通气超空化流动计算中的评价与应用[J].船舶力学, 2012,16(10): 1100-1106.
SHI Su-guo, WANG Guo-yu,YU Zhi-yi, et al. Evaluation of the filter-based turbulence model for computation of unsteady ventilated supercavitating flows[J].Journal of Ship Mechanics, 2012,16(10):1100-1106. (in Chinese)
[11] Wang Y W, Huang C G, Du T Z, et al. Shedding phenomenon of ventilated partial cavitation around an underwater projectile[J]. Chinese Physics Letters, 2012, 29(1): 014601.
[12] 张敏弟，邵峰，郭善刚，等.绕空化器通气空化流场的实验研究[J].工程热物理学报，2011，32(10)：1674-1676.
ZHANG Min-di, SHAO Feng,GUO Shan-gang,et al. An experimental study on ventilation cavitation around a cavitator[J].Journal of Engineering Thermophysics, 2011,32(10):1674-1676. (in Chinese)
[13] 张敏弟，邵峰，付细能，等. 绕空化器自然空化与通气空化的对比[J].工程热物理学报，2012，33(7)：1148-1150.
ZHANG Min-di, SHAO Feng, FU Xi-neng,et al. Camparison between natural and ventilated cavitation around a cavitator[J], Journal of Engineering Thermophysics, 2012,33(7):1148-1150. (in Chinese)

[1]	LI Xiaohui, WANG Hongwei, XIONG Hongliang, SHI Weilong, REN Shaojie, HUANG Zhan. Experimental Study on the Flow Characteristics of a Slender Body of Revolution in the Leeward Region under High-speed Condition [J]. Acta Armamentarii, 2024, 45(3): 818-827.
[2]	DONG Xiang-rui， CHEN Yao-hui， DONG Gang， LIU Yi-xin. Research on Control of Hypersonic Shock Wave/boundary Layer Interactions by Double Micro-ramps [J]. Acta Armamentarii, 2016, 37(9): 1624-1632.
[3]	SUN Zhao， CAO Wei， WANG Cong， WEI Ying-jie. Effect of Surface Wettability on Cavitation of Sphere during Its Water Entry [J]. Acta Armamentarii, 2016, 37(4): 670-676.
[4]	SONG Bao-wei, ZHANG Bao-shou, JIANG Jun, DU Xiao-xu, WANG De-zheng. Estimation of Equation of Motion of Four-rotor Dish-shaped AUV and Simulation Research on Its Hydrodynamic Characteristics [J]. Acta Armamentarii, 2016, 37(2): 299-306.
[5]	ZHANG Xiao-shi， WANG Cong， WEI Ying-jie， SUN Tie-zhi. Research on Collapse Characteristics of Ventilated Cavities around an Underwater Vehicle [J]. Acta Armamentarii, 2016, 37(12): 2324-2330.
[6]	ZHANG Qun-feng，YAN Pan-pan，LI Jun. Elaborate Simulation of Interaction Effect between Internal Weapon Bay and Missile [J]. Acta Armamentarii, 2016, 37(12): 2366-2376.
[7]	TANG Jian-hua，QIAN Lin-fang，XU Ya-dong. Fluid-structure Interaction Modelling of Airdrop Cargo Platform Swinging [J]. Acta Armamentarii, 2016, 37(1): 141-148.
[8]	CHEN Xin, ZHANG Qiang, HE Li-ming, WANG Yu-qian, RONG Kang. Numerical Research on the Effect of Incident Shock Strength on Focusing of Shock Wave in a Parabolic Cavity [J]. Acta Armamentarii, 2015, 36(4): 631-636.
[9]	SUN Ze-gang, XIAO Shi-de, WANG De-hua, XU Ming-heng. Cavitation Flow Simulation and Structural Optimization of Hydraulic Spool Valve V-throttle Groove [J]. Acta Armamentarii, 2015, 36(2): 345-354.
[10]	MA Qing-peng, WEI Ying-jie, WANG Cong, CAO Wei, CHEN Chao-qian. Numerical Simulation of Deep Closure of High-speed Water Entry Cavity of Cone-cylinder [J]. Acta Armamentarii, 2014, 35(9): 1451-1457.
[11]	QIU Hai-qiang， YUAN Xu-long， WANG Ya-dong， LIU Chuan-long. Research on the Law of Development of Outlet Cavity During the Launch of Submarine Launched Missile [J]. Acta Armamentarii, 2014, 35(9): 1510-1514.
[12]	ZHANG Qun-feng， YAN Pan-pan, SHAN Jian-ping, HE Wan-fa. Numerical Simulation of Inlet and Outlet Pressures Influencing Internal flow of a Vane Pump [J]. Acta Armamentarii, 2014, 35(8): 1223-1229.
[13]	MAO Zhao-yong, WEI Chao, HUANG Wei-chao, FAN Yu. Influence of Deflector Baffle on Performance of Banki Wind Turbine [J]. Acta Armamentarii, 2014, 35(8): 1324-1328.
[14]	LI Fu-yuan， ZHANG Yu-wen， DANG Jian-jun， TENG Peng-hua. Research on Hydrodynamic Characteristics of Conical Cavitator [J]. Acta Armamentarii, 2014, 35(7): 1040-1044.
[15]	JIANG Yu-ying， GONG Lie-hang， XU Xin-lin， WANG You-cheng. Numerical Simulation of Flow Field in Abrasive Water Jet Nozzles [J]. Acta Armamentarii, 2014, 35(4): 461-467.