| 绕圆盘空化器空化流动及阻力特性的数值分析 |
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| 引用本文： | 余志毅,时素果,王国玉. 绕圆盘空化器空化流动及阻力特性的数值分析[J]. 北京理工大学学报, 2009, 29(3): 201-204 |
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| 作者姓名： | 余志毅 时素果 王国玉 |
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| 作者单位： | 北京理工大学,机械与车辆工程学院,北京,100081;北京理工大学,机械与车辆工程学院,北京,100081;北京理工大学,机械与车辆工程学院,北京,100081 |
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| 基金项目： | 国家自然科学基金，教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 应用基于滤波器的湍流模型(FBM)对绕圆盘空化器空化非定常流动和阻力特性进行了数值计算和分析. 计算中雷诺数保持不变,通过改变来流压强获得不同的空化数;FBM模型通过二次开发嵌入至商业软件CFX中. 结果表明,随着空化数的减小,绕圆盘空化器的空化区域由与空化器分离转变为附着于空化器;大空化数时,尾迹中更明显的旋涡分布将增强空化器所受阻力的周期性和波动性;随着空化数减小,圆盘空化器所受阻力变得稳定.
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| 关 键 词： | 圆盘空化器 空化流动 阻力特性 滤波器模型(FBM) |
| 收稿时间： | 2008-09-25 |
Numerical Analysis of the Mechanism and Drag Characteristicsof Cavitating Flow Around a Disc Cavitator |
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| YU Zhi-yi,SHI Su-guo and WANG Guo-yu. Numerical Analysis of the Mechanism and Drag Characteristicsof Cavitating Flow Around a Disc Cavitator[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2009, 29(3): 201-204 |
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| Authors: | YU Zhi-yi SHI Su-guo WANG Guo-yu |
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| Affiliation: | School of Mechanical and Vehicular Engineering;Beijing Institute of Technology;Beijing 100081;China |
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| Abstract: | Unsteady cavitating flow around a disc cavitator and its drag characteristics were studied numerically using the filter-based model(FBM).The simulation was carried out in a constant Reynolds number but different cavitation numbers,which were attained through the pressure variation of the inlet flow.The FBM model was embedded into the commercial software CFX through secondary development.The numerical results showed that the cavitation region will turn attached with the cavitator with the decrease of the cav... |
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| Keywords: | disc cavitator cavitating flow drag characteristics filter-based model (FBM) |
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