Unsteady prediction of cavitating flow around a three dimensional hydrofoil by using a modified RNG k-ε model
Unsteady prediction of cavitating flow around a three dimensional hydrofoil by using a modified RNG k-ε model
复制标题
使用改进的 RNG k-epsilon 模型对三维水翼周围的空化流进行非定常预测
DOI：
10.1016/j.oceaneng.2018.04.005
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发表时间：
2018-06
影响因子：
5
通讯作者：
Fan Honggang
中科院分区：
文献类型：
--
作者：
Ahn Soo-Hwang;Xiao Yexiang;Wang Zhengwei;Luo Yongyao;Fan Honggang
本文提出了一种预测空化流动的湍流粘度模型的修正方法。改进了双方程湍流模型，该模型由于湍流粘度过高而不能准确预测非定常云空化。修正的方法是，空化流动不仅取决于混合流场的湍流粘度，而且取决于气腔附近的周围流场的湍流粘度。利用空化模型与正压状态方程的相关性，修正了标准RNGk-ε湍流模型中的湍流粘度。采用修正模型和标准模型对三维NACA0015型水翼的非定常空化流动进行了数值模拟。修正模型的仿真结果与实验结果吻合较好。从数值结果出发，讨论了湍流粘度对空化模拟和空化流动的影响。本文的研究表明，强湍流主要在凝结过程中产生，它延迟了下一个循环的空化开始。
The present paper suggests a modification of the turbulent viscosity model for predicting cavitating flows. It is to improve the two-equation turbulence model, which failed to accurately predict unsteady cloud cavitation due to the turbulent viscosity overestimated. The modification approach is that the cavitating flow depends on the turbulent viscosity in not only the mixture flow field but also the surrounding flow field in the vicinity of the vapor cavity. The turbulent viscosity in the standard RNGk-εturbulence model was modified by the correlation between the cavitation model and the Barotropic equation of state. The unsteady cavitating flow around a 3-D NACA0015 hydrofoil was simulated by using the modified model as well as the standard model. The simulation result for the modified model agreed well with the experimental one. From the numerical result, the effect of the turbulent viscosity on the cavitation simulation and the cavitating flows was discussed. The present work showed that the strong turbulence is mainly produced in the condensation process, and it delays the cavitation inception in the next cycle.
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扭曲水翼周围非定常空化湍流及脱落马蹄涡结构的数值分析
DOI：
10.1016/j.ijmultiphaseflow.2012.11.008
发表时间：
2013-05
影响因子：
3.8
作者：
Luo, Xianwu(罗先武);Wu, Yulin(吴玉林);Peng, Xiaoxing(彭晓星);Duan, Yunling(段云岭)
通讯作者：
Duan, Yunling(段云岭)
影响因子：
2.8
作者：
R. Kunz;D. Boger;D. R. Stinebring;T. Chyczewski;J. Lindau;H. Gibeling;S. Venkateswaran;T. Govindan-T.-Govin
通讯作者：
R. Kunz;D. Boger;D. R. Stinebring;T. Chyczewski;J. Lindau;H. Gibeling;S. Venkateswaran;T. Govindan-T.-Govin
DOI：
--
发表时间：
2003
期刊：
--
影响因子：
--
作者：
Yoshinori Saito
通讯作者：
Yoshinori Saito
影响因子：
4.1
作者：
S. Venkateswaran;J. Lindau;R. Kunz;C. Merkle
通讯作者：
S. Venkateswaran;J. Lindau;R. Kunz;C. Merkle
影响因子：
8.6
作者：
YAKHOT, V;ORSZAG, SA
通讯作者：
ORSZAG, SA