航天推进技术研究院主办
[1]李雨濛,陈 晖,项 乐,等.水翼非定常空化流动中湍流模型研究[J].火箭推进,2019,45(06):29-37.
LI Yumeng,CHEN Hui,XIANG Le,et al.Study on turbulent model of unsteady cavitating flow around hydrofoil[J].Journal of Rocket Propulsion,2019,45(06):29-37.
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LI Yumeng,CHEN Hui,XIANG Le,et al.Study on turbulent model of unsteady cavitating flow around hydrofoil[J].Journal of Rocket Propulsion,2019,45(06):29-37.
水翼非定常空化流动中湍流模型研究
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
45
期数:
2019年06期
页码:
29-37
栏目:
研究与技术
出版日期:
2019-12-25
- Title:
- Study on turbulent model of unsteady cavitating flow around hydrofoil
- 文章编号:
- 1672-9374(2019)06-0029-09
- Keywords:
- hydrofoil; cavitating flow; unsteady; turbulence model; MFBM
- 分类号:
- V431; TV131.32
- 文献标志码:
- A
- 摘要:
- 为了改进常规RANS方法中标准k-ε模型过渡预测流场涡黏性的问题,对几种标准k-ε模型的修正模型在空化流动的模拟中进行了应用评价,将修正后的湍流模型以二次开发的形式嵌入至商用CFD软件中,对某二维翼型表面空化流动进行了非定常数值仿真。结果表明:采用MFBM模型计算得到的翼型升力系数频率与实验偏差最小,达到0.6%; 翼型表面非定常空化形态与实验结果最接近,具备最佳的计算效果。同时基于计算结果揭示了翼型表面非定常空化流动的产生机理,发现逆压梯度引起的反向射流作用导致空化云脱落,脱落后的空化云溃灭会改变翼型表面压力分布,造成空化云周期性脱落,进一步导致翼型升力系数周期性变化。
- Abstract:
- In order to improve the standard k-ε turbulent model in traditional RANS method over-predicting the eddy viscosity, this paper evaluates the application of several modified approaches used to reduce the eddy viscosity in cavitating flow.The modified turbulent models are employed in the commercial CFD software to simulate the unsteady cavitating flow around a 2D hydrofoil.It is found that the error of lift coefficient calculated by the MFBM model is only 0.6% and it is the smallest compared with the experimental results.In addition, the unsteady cavitation morphology calculated by MFBM is the closest to the experiment data, which indicates that MFBM has the best simulation effect.At the same time, based on the computation results, the mechanism of unsteady cavitating flow around a hydrofoil is revealed, and the reverse jet caused by the adverse pressure gradient results in the shedding of cloud cavitation.The shedded cloud cavitation collapses and changes the pressure distribution around the hydrofoil, which causes the periodic shedding of cloud cavitation and further leads to the periodically change of lift coefficient.
参考文献/References:
[1] 陈晖, 李斌, 张恩昭, 等.液体火箭发动机高转速诱导轮旋转空化[J].推进技术, 2009, 30(4):390-395.
[2] RYAN R, GROSS L, MILLS D, et al. The space shuttle main engine liquid oxygen pump high-synchronous vibration issue, the problem, the resolution approach, the solution[C[//30th Joint Propulsion Conference and Exhibit. Indianapolis, IN, USA. Reston, Virigina: AIAA, 1994.
[3] ZOLADZ T. Observations on rotating cavitation and cavitation surge from the development of the Fastrac engine turbopump[C]//36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. Las Vegas, NV, USA. Reston, Virigina: AIAA, 2000.
[4] ONO A, WARASHIUA S, TOMARU H. Development of cryogenic turbopumps for the LE-7A engine[J]. IHI Engineering Review, 2004, 37(1):9-13.
[5] KAMIJO K,SHIMURA T,WATANABE M.A visual observation of cavitating inducer instability[R].Tokyo:National Aerospace Laboratory,1980.
[6] 陈晖, 张恩昭, 李斌.诱导轮旋转空化诱发不稳定现象的研究与进展[J].水泵技术, 2006(2):1-5.
[7] BRENNEN C E.Hydrodynamics of pumps[M].Oxford:Concepts ETI, Inc.and Oxford University Press, 1994.
[8] 陈泰然, 顾玲燕, 王国玉, 等.RP-3航空煤油不同替代模型的空化流动特性[J].推进技术, 2016, 37(3):563-571.
[9] LIU S H, LI S C, ZHANG L, et al.A mixture model with modified mass transfer expression for cavitating turbulent flow simulation[J].Engineering Computations, 2008, 25(4):290-304.
[10] 时素果, 王国玉, 胡常莉, 等.不同温度水体空化水动力脉动特性的试验研究[J].机械工程学报, 2014, 50(8):174-181.
[11] WANG G, SENOCAK I, SHYY W.Dynamics of attached turbulent cavitating flows[J].Progress in Aerospace Sciences, 2001, 37(6):551-581.
[12] LEROUX J B, ASTOLFI J A, BILLARD J Y.An experimental study of unsteady partial cavitation[J].Journal of Fluids Engineering, 2004, 126(1):94-101.
[13] 尹必行, 康灿.绕水翼空化流场的数值模拟与试验研究[J].机械工程学报, 2012, 48(16):146-151.
[14] LAUNDER B E, SPALDING D B.The numerical computation of turbulent flows[J].Computer Methods in Applied Mechanics and Engineering, 1974, 3(2):269-289.
[15] CHEAH K W, LEE T S, WINOTO S H.Unsteady fluid flow study in a centrifugal pump by CFD method[C]//7th ASEAN ANSYS Conference.Biopoils, Singapore:[s.n.], 2008.
[16] 张兆顺, 崔桂香, 许春晓.湍流理论与模拟[M].北京:清华大学出版社, 2005.
[17] JOHANSEN S T, WU J, SHYY W.Filter-based unsteady RANS computations[J].International Journal of Heat and Fluid Flow, 2004, 25(1):10-21.
[18] HUANG B, WANG G Y, ZHAO Y.Numerical simulation unsteady cloud cavitating flow with a filter-based density correction model[J].Journal of Hydrodynamics, 2014, 26(1):26-36.
[19] COUTIER-DELGOSHA O, FORTES-PATELLA R, REBOUD J L.Evaluation of the turbulence model influence on the numerical simulations of unsteady cavitation[J].Journal of Fluids Engineering, 2003, 125(1):38-45.
[20] 洪锋, 高振军, 袁建平.基于Rayleigh-Plesset方程的空化模型改进与应用[J].农业机械学报, 2018, 49(2):126-132.
[21] ZWART P J, GERBER A G, BELAMR I T.A two-phase flow model for predicting cavitation dynamics[C]//Proceedings of the 5th international conference on multiphase flow.Yokohama, Japan:[s.n.],2004.
备注/Memo
收稿日期:2018-08-24; 修回日期:2019-03-11基金项目:国家重大基础研究项目(613321)作者简介:李雨濛(1994—),女,硕士,研究领域为流体机械及工程
更新日期/Last Update:
2019-12-20