NUMERICAL SIMULATION AND ANALYSIS OF ACTIVE JET CONTROL OF HYDROFOIL CAVITATION
-
摘要:
为了改善高速流动工况下水翼吸力面上流场的空化特性,提出了水翼表面主动射流对绕水翼周围流动加以控制的方法.基于密度分域滤波的FBDCM混合湍流模型联合Zwart-Gerber-Belamri空化模型,分析了来流空化数为0.83,来流攻角为8°,射流位置距水翼前缘为x=0.19c时,主动射流对于水翼吸力面上流动的空化特性和水动力特性影响.对回射流的强度进行了量化分析,以探究回射流与流场空化特性的关系.数值分析结果表明,在射流水翼吸力面上的时均空泡体积为原始水翼的1/15,使得流场内空化流动由云空化状态转变为较为稳定的片空化状态,显著地削弱了云空化的发展.此外,射流极大地改善了水翼的水动力性能,使得水翼的升阻比较原始水翼提高了22.9%,空泡的脱落频率减少了26.2%,空泡脱落所引起的振幅减小了9.1%.射流大幅降低了水翼吸力面上低压区面积,水翼吸力面上流体的逆向压力减小,回射流强度降低;同时,射流使水翼吸力面上的边界层减薄,增强了流动的抗逆压梯度能力,一定程度上阻挡了回射流向水翼前缘的流动,这也从机理上分析了主动射流抑制空化的原因.
Abstract:In order to improve the cavitation characteristics of the flflow fifield on the suction side of the hydrofoil under high-speed flflow conditions, a method of active water jet arranged on the suction side is proposed to control the flflow around the hydrofoil. Based on a fifilter-based density correction turbulence model combined with Zwart-Gerber-Belamri cavitation model, the inflfluence of the water jet on the cavitation and hydrodynamic characteristics of the hydrofoil is analyzed when the cavitation number is 0.83, the angle of attack is 8◦ and the water jet is 0.19c from the foil leading edge. The intensity of the re-entrant jet is analyzed quantitatively to explore the relationship between the re-entrant jet and the cavitation characteristics of the flflow fifield. The numerical results show that the time-average cavity volume on the suction side of the hydrofoil with jet is 14/15 smaller than that of the original hydrofoil, which indicate that the water jet can signifificantly weaken the development of cavitation, and thus the cavitation pattern in the flflow fifield transforms from cloud cavitation to sheet cavitation. Moreover, the water injection greatly improves the hydrodynamic performance of the hydrofoil. The lift to drag ratio of the hydrofoil increases by 22.9% compared with that of the original hydrofoil, meanwhile, and the shedding frequency of the cavitation decreases by 26.2%, and the amplitude caused by the shedding of the cavitation decreases by 9.1%. The water jet shrinks low pressure area on the suction side sharply and reduces the reverse pressure difffference of flflow in the vicinity of the hydrofoil, as a result, intensity of the re-entrant jet declined. The water injection also thins the boundary layer which enhances the anti-reverse pressure gradient capability of the flflow and then blocks the re-entrant jet. Those explain the mechanism of cavitation flflow control by active water injection.
-
Key words:
- cavitation suppression /
- active injection /
- re-entrant jet /
- hydrodynamic performance /
- flow control
-
1 Pendar MR, Roohi E. Investigation of cavitation around 3D hemi-spherical head-form body and conical cavitators using different tur-bulence and cavitation models. Ocean Engineering, 2016, 112: 287-306 2 王畅畅, 王国玉, 黄彪. 空化可压缩流动空穴溃灭激波特性研究. 力学学报, 2018, 50(5): 990-1002 (Wang Changchang, Wang Guoyu, Huang Biao. Numerical simulation of shock wave dynamics in transient turbulent cavitating flows. Chinese Journal of Theoreti-cal and Applied Mechanics, 2018, 50(5): 990-1002 (in Chinese)) 3 李晓俊. 离心泵叶片前缘空化非定常流动机理及动力学特性研究. [博士论文]. 镇江: 江苏大学, 2013 (Li Xiaojun. Mechanism and unsteady dynamic characteristics of leading edge cavitation in a centrifugal pump. [PhD Thesis]. Zhenjiang: Jiangsu University, 2013 (in Chinese)) 4 Li CY, Ceccio SL. Interaction of single travelling bubbles with the boundary layer and attached cavitation. Journal of Fluid Mechanics, 1996, 322: 329-353 5 Chen YL, Heister SD. Modeling hydrodynamic nonequilibrium in cavitating flows. Journal of Fluids Engineering, 1996,118(1): 172-178 6 Huang B, Wang GY. Experimental and numerical investigation of unsteady cavitating flows through a 2D hydrofoil. Science China Technological Science, 2011, 54(7): 1801-1812 7 张洋, 陈科, 尤云祥等. 浮力气泡对水平壁面的回弹动力学特性. 力学学报, 2019, 51(5): 1285-1295 (Zhang Yang, Chen Ke, You Yunxiang, et al. Bouncing behaviors of a buoyancy-driven bubble on a horizontal solid wall. Chinese Journal of Theoretical and Ap-plied Mechanics, 2019, 51(5): 1285-1295 (in Chinese)) 8 Huang B, Zhao Y, Wang GY. Large eddy simulation of turbu-lent vortex-cavitation interactions in transient sheet/cloud cavitating flows. Computers & Fluids, 2014, 92: 113-124 9 Ye YH, Li GJ. Modeling of hydrodynamic cavitating flows consid-ering the bubble- bubble interaction, International Journal of Multi-phase Flow, 2016, 84: 155-164 10 Anderlini A, Salvetti MV, Agresta A, et al. Stochastic sensitivity analysis of numerical simulations of injector internal flows to cavi-tation modeling parameters. Comput Fluids, 2019, 183: 130-147 11 Congedo PM, Goncalves E, Rodio MG. About the uncertainty quan-tification of turbulence and cavitation models in cavitating flows simulations. European Journal of Mechanics — B/Fluids, 2015, 53: 190-204 12 Huang B, Wang GY, Zhao Y. Numerical simulation unsteady cloud cavitating flow with a filter-based density correction model. Journal of Hydrodynamics, 2014, 26(1): 26-36 13 Johansen ST, Wu JY, Shyy W. Filter-based unsteady RANS compu-tations. International Journal of Heat and Fluid Flow, 2004, 25(1): 10-21 14 Coutier-Delgosha O, Reboud JL, Delannoy Y. Numerical simulation of the unsteady behaviour of cavitating flows. International Journal for Numerical Methods in Fluids, 2003, 42(5): 527-548 15 Yu A, Ji B, Huang RF, et al. Cavitation shedding dynamics around a hydrofoil simulated using a filter-based density corrected model. Science China Technological Sciences, 2015, 58(5): 864-869 16 Timoshevskiy MV, Zapryagaev II, Pervunin KS, et al. Manipulating cavitation by a wall jet: Experiments on a 2D hydrofoil. Interna-tional Journal of Multiphase Flow, 2018, 99: 312-328 17 Chatterjee D, Arakeri VH. Towards the concept of hydrodynamic cavitation control. Journal of Fluid Mechanics, 1997, 332: 377-394 18 Chahine GL, Frederick GF, Bateman RD. Propeller tip vortex cavita-tion suppression using selective polymer injection. Journal of Fluids Engineering, 1993, 115(3): 497-503 19 Chang N, Ganesh H, Yakushiji R, et al. Tip vortex cavitation sup-pression by active mass injection. Journal of Fluids Engineering, 2011, 133(11): 111301 20 M¨akiharju SA, Ganesh H, Ceccio SL. Effect of non-condensable gas injection on cavitation dynamics of partial cavities//Farhat M, M¨uller A eds. Journal of Physics: Conference Series, the 9th In-ternational Symposium on Cavitation (CAV2015), Lausanne, 2015, Bristol: Ashton A, 2015. 012161 21 Wang W, Yi Q, Wang YY, et al. Adaptability research of hydro-foil surface water injection on cavitation suppression. Journal of Drainage and Irrigation Machinery Engineering, 2017, 35(6): 461-466, 480 22 Leger AT, Ceccio SL. Examination of the flow near the leading edge of attached cavitation. Part 1. Detachment of two-dimensional and axisymmetric cavities. Journal of Fluid Mechanics, 1998, 376: 61-90 23 Kadivar E, Moctar O E, Javadi K. Investigation of the effect of cavi-tation passive control on the dynamics of unsteady cloud cavitation. Applied Mathematical Modelling, 2018, 64: 333-356 24 王巍, 唐滔, 卢盛鹏等. 水翼吸力面布置凹槽抑制空化研究. 农业工程学报, 2019, 35(2): 40-47 (Wang Wei, Tang Tao, Lu Sheng-peng, et al. Investigation of cavitation suppression by arranging pits on hydrofoil suction side. Transactions of the Chinese Society of Agricultural Engineering, 2019, 35(2): 40-47 (in Chinese)) 25 Kawanami Y, Kato H, Yamaguchi H, et al. Mechanism and control of cloud cavitation. Journal of Fluids Engineering, 1997, 119(4): 788-794 26 Wang W, Lu SP, Xu RD, et al. Numerical study of hydrofoil sur-face jet flow on cavitation suppression. Journal of Drainage and Irrigation Machinery Engineering, 2017, 35(10): 829-834 27 Coutier-Delgosha O, Devillers JF, Leriche M, et al. Effect of wall roughness on the dynamics of unsteady cavitation. Journal of fluids Engineering, 2005, 127(4): 726-733 28 Lu SP, Wang W, Hou TF, et al. Experiment research on cavitation control by active injection//Katz J. Proceedings of the 10th Interna-tional Symposium on Cavitation(CAV2018), The 10th International Symposium on Cavitation(CAV2018), Baltimore, 2018, New York: ASME Press, 2018: 363-368 29 张佳悦, 李达钦, 吴钦等. 航行体回收垂直入水空泡流场及水动力特性研究. 力学学报, 2019, 51(3): 803-812 (Zhang Jiayue, Li Daqin, Wu Qin, et al. Numerical investigation on cavity structures and hyrodynamics of the vehicle during vertical water-entry. Chi-nese Journal of Theoretical and Applied Mechanics, 2019, 51(3): 803-812 (in Chinese)) 30 Coutier-Delgosha O, Fortes-patella R, Reboud JL. Evaluation of the turbulence model influence on the numerical simulations of un-steady cavitation. Journal of Fluids Engineering, 2003, 125(1): 38-45 31 Zwart PJ, Gerber AG, Belamri T. A two-phase flow model for pre-dicting cavitation dynamics//Fifth International Conference on Mul-tiphase Flow, Yokohama, Japan, 2004, 152 32 Leroux JB, Astolfi JA, Billard JY. An experimental study of un-steady partial cavitation. Journal of Fluids Engineering, 2004, 126(1): 94-101 33 李聪洲, 张新曙, 胡晓峰等. 高雷诺数下多柱绕流特性研究. 力学学报, 2018, 50(2): 233-243 (Li Congzhou, Zhang Xinshu, Hu Xiaofeng, et al. The study of flow past multiple cylinders at high reynolds numbers. Chinese Journal of Theoretical and Applied Me-chanics, 2018, 50(2): 233-243 (in Chinese)) 34 王巍, 徐瑞铎, 羿琦等. 回射流强度对水翼表面空化形态的影响. 排灌机械工程学报, 2016, 34(11): 921-926, 940 (Wang Wei, Xu Ruiduo, Yi Qi, et al. Influence of re-entrant jet strength on cavita-tion characteristics of hydrofoil. Journal of Drainage and Irrigation Machinery Engineering, 2016, 34(11): 921-926, 940 (in Chinese)) -

计量
- 文章访问数: 557
- HTML全文浏览量: 170
- PDF下载量: 44
- 被引次数: 0