| 陷落腔剪切层自持振荡的数值计算分析 |
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| 引用本文： | 姚熊亮,杨国晶,戴绍仕,李卓.陷落腔剪切层自持振荡的数值计算分析[J].水动力学研究与进展(A辑),2009,24(3). |
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| 作者姓名： | 姚熊亮 杨国晶 戴绍仕 李卓 |
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| 作者单位： | 哈尔滨工程大学船舶工程学院,哈尔滨,150001 |
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| 基金项目： | 哈尔滨工程大学国防科技工业技术基础科研项目 |
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| 摘 要： | 该文主要研究陷落腔剪切层自持振荡的水动力特性,以不可压缩Navier-Stokes方程为控制方程,利用计算流体力学软件CFX中的高级湍流模型Larger eddy simulation(LES),使用simple算法进行数值仿真计算.数值计算结果表明:随着腔中的大涡沿着随边向上爬升并趋于稳定,在腔口导边处不断有附着涡脱出,而后又很快的破碎;得出不同雷诺数下腔口剪切层处的压力系数沿周向的分布规律及剪切层自持振荡的频率特性,总结出剪切层处的各阶振荡频率随着雷诺数的不同趋于常数;将数值计算得出的结果与物理实验的数据进行对比分析,从而验证了数值计算的可靠性.
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| 关 键 词： | 陷落腔 大涡模拟 剪切层 自持振荡 附着涡 |
The numerical calculation of the self-sustaining oscillation shear layers in cave-in cavity |
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| YAO Xiong-liang,YANG Guo-jing,DAI Shao-shi,LI Zhuo.The numerical calculation of the self-sustaining oscillation shear layers in cave-in cavity[J].Journal of Hydrodynamics,2009,24(3). |
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| Authors: | YAO Xiong-liang YANG Guo-jing DAI Shao-shi LI Zhuo |
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| Affiliation: | School of Shipbuilding Engineering;Harbin Engineering University;Harbin 150001;China |
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| Abstract: | A numerical method is applied to study the hydrodynamic character of the self-sustaining oscillation shear layers in cave-in cavity. The incompressible Navier-Stokes equations are taken as the governing equations while the advanced turbulent model LES in computational fluid dynamics and the simple algorithm are used in numerical simulation computation. The numerical results indicate that a lot of attached-eddies are shedding continuously at leading-edge of cavity mouth along with the large eddy are climbing... |
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| Keywords: | cave-in cavity LES shear layer self-sustaining oscillation attached-eddies |
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