| 绕栅中水翼空化流动的数值和实验研究 |
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| 引用本文： | 时素果,王国玉,黄彪.绕栅中水翼空化流动的数值和实验研究[J].力学学报,2011,43(3):625-629. |
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| 作者姓名： | 时素果 王国玉 黄彪 |
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| 作者单位： | 北京理工大学机械与车辆工程学院 |
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| 基金项目： | 国家自然科学基金(50979004); 高校博士学科专项科研基金(200800070027)资助项目~~ |
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| 摘 要： | 采用数值计算和实验研究的方法研究了绕水翼和栅中水翼的非定常空化流动. 实验采用高速
录像技术分别观察了绕水翼和栅中水翼云状空化形态随时间的变化, 测量了升阻力, 并对测
量数据进行了频率分析. 计算时空化模型选用了能比较准确描述旋涡空化非定常特性的
Kubota模型, 湍流模型采用能准确捕捉流场非定常特性的FBM模型. 计算模型的可靠性用实
验结果进行验证. 结果表明, 计算与实验的结果基本一致, 相比绕单个水翼的空化流动, 绕
栅中水翼的空穴厚度比较薄, 翼型近壁处的逆压梯度较小, 反向射流的速度较小, 且水汽混
合区速度梯度较小, 空穴的脱落周期变长, 平均升阻力系数较小
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| 关 键 词： | 栅中水翼 空穴形态 反向射流 脱落周期 |
| 收稿时间： | 2010-06-24 |
| 修稿时间： | 2010-10-02 |
THE STRUCTURE ANALYSIS ABOUT THE CAVITATION FLOW AROUND THE CASCADE HYDROFOIL BY NUMERICAL AND EXPERIMENTAL STUDY |
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| Shi Suguo
,
Wang Guoyu
,
Huang Biao.THE STRUCTURE ANALYSIS ABOUT THE CAVITATION FLOW AROUND THE CASCADE HYDROFOIL BY NUMERICAL AND EXPERIMENTAL STUDY[J].chinese journal of theoretical and applied mechanics,2011,43(3):625-629. |
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| Authors: | Shi Suguo Wang Guoyu Huang Biao |
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| Institution: | School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | The unsteady dynamics of cavitating flows around a hydrofoil and in a cascade hydrofoil are investigated by numerical and experimental methods.Experiments around a hydrofoil and on a cascade hydrofoil are carried out in a rectangular test section of a cavitation tunnel,and the lift and drag force are conducted and the frequency characteristics of lift signals are analyzed.The cavitation model in calculation is Kubota model which can describe the unsteady vortex cavitation accurately;the filter-based turbule... |
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| Keywords: | the cascade hydrofoil cavity shape re-entrant jet shedding period |
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