| 绕圆盘钝体空化绕流现象的试验与数值模拟 |
| |
| 引用本文： | 黄彪,王国玉,张敏第.绕圆盘钝体空化绕流现象的试验与数值模拟[J].科技导报(北京),2011(12). |
| |
| 作者姓名： | 黄彪 王国玉 张敏第 |
| |
| 作者单位： | 北京理工大学机械与车辆工程学院; |
| |
| 基金项目： | 国家自然科学基金项目(50979004) |
| |
| 摘 要： | 通过试验研究与计算流体力学(CFD)数值分析相结合的方式深入研究了在不同空化阶段,绕圆盘钝体的非定常空化流动现象。试验和计算中,保持雷诺数不变,通过改变环境压强获得了不同空化数。试验在高速空化水洞中完成,采用高速摄像技术观测了各个空化阶段绕圆盘钝体的空穴形态,数值计算采用了汽-液两相的均相流模型,湍流模型和空化模型均分别采用基于密度函数分域的闭合方式,数值计算结果与试验结果吻合较好。研究结果表明,在不同空化阶段,绕圆盘钝体非定常空化流场呈现不同的阶段性特征,空化流场结构与形态存在很大的差异,随着空化数的减小,空化流场经历了小尺度空泡团的脉动—不稳定团状空化—稳定超空化等阶段,在空化的发展过程中,存在强烈的汽、液相间的质量和动量交换。
|
| 关 键 词： | 圆盘钝体 非定常空化 空穴形态 |
Experimental and Numerical Simulation of Cavitating Flow Around a Disc |
| |
| HUANG Biao,WANG Guoyu,ZHANG Mindi School of Mechanical , Vehicular Engineering,Beijing Institute of Technology,Beijing ,China.Experimental and Numerical Simulation of Cavitating Flow Around a Disc[J].Science & Technology Review,2011(12). |
| |
| Authors: | HUANG Biao WANG Guoyu ZHANG Mindi School of Mechanical Vehicular Engineering Beijing Institute of Technology Beijing China |
| |
| Institution: | HUANG Biao,WANG Guoyu,ZHANG Mindi School of Mechanical and Vehicular Engineering,Beijing Institute of Technology,Beijing 100081,China |
| |
| Abstract: | The unsteady cavitating flows around a disc are studied by experimental and numerical methods,where the Reynolds number remains the same and different cavitation numbers are obtained by changing the pressure values.Experiments are carried out in a rectangular test section of a cavitation tunnel;and a high-speed video camera is used to visualize the unsteady cavitation flow patterns.The calculations are conducted for a three-dimensional disc,based on a single-fluid model of the cavitation:the liquid/vapor mi... |
| |
| Keywords: | disc unsteady cavitating flow cavity shape |
| 本文献已被 CNKI 等数据库收录！ |
|
