排灌机械工程学报
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排灌机械工程学报  2012, Vol. 30 Issue (1): 1-5    DOI: 10.3969/j.issn.1674-8530.2012.01.001
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考虑不可凝结气体的空化流模型及数值模拟
宋宇, 曹树良
(清华大学水沙科学与水利水电工程国家重点实验室, 北京 100084)
Cavitation model with noncondensable gas effect and its numerical simulation
SONG Yu,CAO Shu-Liang
(State Key Laboratory of Hydro Science Engineering,Tsinghua University,Beijing 100084, China)
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摘要 以均相流假设为基础建立了一种基于输运方程的空化流模型,该模型在质量传输方程中不仅考虑了蒸发和凝结的机理,而且考虑了不可凝结气体的影响.采用RNG k-ε湍流模型,并引入与混合密度相关的修正函数对湍流涡黏性系数进行修正.应用文中的空化流模型,对NACA66翼型进行了定常空化流动数值模拟,翼型吸力面的压力系数分布曲线与试验结果吻合很好.在此基础上,进一步研究了模型中不可凝结气体质量分数以及不同进口湍动能和湍流耗散率对空泡形成和发展的影响,确定了模型中不可凝结气体质量分数、进口湍动能和湍流耗散率的合理取值.应用空化流模型对非定常空化流动进行了数值模拟,数值模拟结果清晰地反映了翼型表面空化云的初生、成长、脱落和溃灭的全过程,并指出反向射流是引起空化云脱落的重要原因.非定常计算得到的斯特劳哈数与试验相吻合,进一步验证了该模型在空化流数值计算中的可靠性.
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宋宇
曹树良
关键词空化流模型   不可凝结气体   状态方程   湍流模型   反向射流   数值模拟     
Abstract: A transport equationbased cavitation model was developed according to the homogeneous assumption in this paper.The mechanism of evaporation and condensation was considered in the model.The noncondensable gas was also taken into account in cavity formation and development.The RNG turbulence model was employed with a modified turbulent viscosity according to the mixed density.The proposed model was implemented to simulate the steady cavitating flow around a NACA66 airfoil.The pressure coefficient distributions on the suction side of the foil agreed well with the experiment results.Furthermore,the effects of noncondensable gas,inlet turbulent kinetic energy and turbulence dissipation rate on the cavity length were evaluated.The proper values of noncondensable gas,inlet turbulent kinetic energy and turbulence dissipation were selected.Then,the proposed model was applied to an unsteady cavitating flow.The numerical results clearly reflected the whole process of the cavitationcloud generation,growth,dispersion and collapse.The simulation showed re-entrant jet is one of the main reasons for the breakoff process.The Strouhal number obtained agreed well with the experiment results.The overall results prove the reliability of the proposed model in cavitating flow simulations.
Key wordscavitation model   non condensable gas   state equation   turbulence model   re-entrant jet   numerical simulation   
收稿日期: 2011-05-07; 出版日期: 2012-01-30
基金资助:

国家自然科学基金资助项目(51176088)

通讯作者: 宋宇(1985—),女,辽宁沈阳人,博士研究生(songyu07@mails.tsinghua.edu.cn),主要从事流体机械研究.   
作者简介: 曹树良(1955—),男,甘肃会宁人,教授,博士生导师(caoshl@mail.tsinghua.edu.cn),主要从事流体机械研究.
引用本文:   
宋宇,曹树良. 考虑不可凝结气体的空化流模型及数值模拟[J]. 排灌机械工程学报, 2012, 30(1): 1-5.
SONG Yu,CAO Shu-Liang. Cavitation model with noncondensable gas effect and its numerical simulation[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(1): 1-5.
 
[1] 参考文献(References)
[2] Asnaghi A,Jahanbakhsh E,Seif M S.Unsteady multiphase modeling of cavitation around NACA0015[J].Journal of Marine Science and Technology,2010,28(5):689-696.[ZK)]
[3] 谭磊,曹树良.基于滤波器湍流模型的水翼空化数值模拟[J].江苏大学学报:自然科学版,2010,31(6):683-686.
Tan Lei,Cao Shuliang.Numerical simulation of hydrofoil cavitation based on filterbased model[J].Journal of Jiangsu University:Natural Science Edition,2010,31(6):683-686.(in Chinese)
[4] 谭磊,曹树良,桂绍波,等.绕水翼空化流动的数值模拟[J].清华大学学报:自然科学版,2010,50(7):1058-1062.
Tan Lei,Cao Shuliang,Gui Shaobo,et al.Numerical simulation of cavity flow around a hydrofoil[J].Journal of Tsinghua University:Science and Technology,2010,50(7):1058-1062.(in Chinese)
[5] Huang Biao,Wang Guoyu,Yuan Haitao Y.A cavitation model for cavtating flow simulations[J].Journal of Hydrodynamics,2010:22(1):756-762.
[6] Morgut M,Nobile E,BiluI.Comparison of mass transfer models for the numerical prediction of sheet cavitation around a hydrofoil[J].International Journal of Multiphase Flow,2011:37(6):620-626.
[7] 谭磊,曹树良.中比转速离心泵叶轮的优化设计及数值模拟[J].排灌机械工程学报,2010,28(4):282-285.
Tan Lei,Cao Shuliang.Optimal design and numerical simulation for impeller of centrifugal pump with mediumhigh specific speed[J].Journal of Drainage and Irrigation Machinery Engineering,2010,28(4):282-285.(in Chinese)
[8] 谭磊,曹树良,桂绍波,等.带有前置导叶离心泵空化性能的试验及数值模拟[J].机械工程学报,2010,46(18):177-182.
Tan Lei,Cao Shuliang,Gui Shaobo,et al.Experiment and numerical simulation of cavitation performance for centrifugal pump with inlet guide vane[J].Journal of Mechanical Engineering,2010,46(18):177-182.(in Chinese)
[9] Yamaguchi.Cloud cavitation on foil sections [C]∥Proceedings of the 6th International Symposium on Cavitation.Wageningen:the Netherlands,2006:1-2.
[10] Kubota A,Kuto H,Yamaguchi H.A new modeling of cavitating flows:A numerical study of unsteady cavitation on a hydrofoil section[J].Journal of Fluid Mechanics,1992,240:59-96.
[11] Shen Y T,Dimotakis P E.The influence of surface cavitation on hydrodynamic forces [C]∥Proceedings of the 22nd American Towing Tank Conference.Canada:St.John′s,1989:44-52.
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