| 剪切层区域旋涡空化的发生机理 |
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| 引用本文： | 王国玉,曹树良,井小获利明.剪切层区域旋涡空化的发生机理[J].清华大学学报(自然科学版),2001,41(10):62-64. |
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| 作者姓名： | 王国玉 曹树良 井小获利明 |
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| 作者单位： | 1. 清华大学热能工程系,
2. 东北大学流体科学研究所 |
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| 基金项目： | 中国博士后科学基金资助项目 ( [2 0 0 0 ] 2 3) |
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| 摘 要： | 为研究高速水流中旋涡空化的形成机理 ,用高速摄影和录像的方法观察了发生在中空射流阀内部流场的空化现象 ,采用数值模拟的方法计算了阀内部非定常粘性流场。发现流场中空化的产生与流动分离以及所伴随的剪切层区域的非定常旋涡运动有关。旋涡空化水流中有两种空穴 ,即空化泡与空化旋涡。在剪切层非定常旋涡从流动分离点产生的过程中 ,旋涡形成区域的压力进一步降低 ,在空化条件下产生大量的空泡 ,部分空泡被旋涡所包容 ,从而形成空化旋涡
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| 关 键 词： | 旋涡空化 数值分析 高速摄影 剪切层 射流放水阀 |
| 文章编号： | 10000054(2001)10-0062-03 |
| 修稿时间： | 2000年5月25日 |
Vortex cavitation mechanisms in shear layer flow |
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| WANG Guoyu ,CAO Shuliang ,IKOHAGI Toshiaki.Vortex cavitation mechanisms in shear layer flow[J].Journal of Tsinghua University(Science and Technology),2001,41(10):62-64. |
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| Authors: | WANG Guoyu CAO Shuliang IKOHAGI Toshiaki |
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| Institution: | WANG Guoyu 1,CAO Shuliang 1,IKOHAGI Toshiaki 2 |
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| Abstract: | The generation mechanisms for vortex cavitation in highshear layers were studied by observing cavitation around a hollowjet valve with highspeed photographs and a highspeed video camera. The unsteady viscous flows around the valve were also simulated numerically. The results showed that there were two kinds of cavities in the vortex cavitation flows, cavitation bubbles and cavitating vortices. The cavitating vortices were contained many cavitation bubbles in the cores of the vortices. These bubbles were generated and contained by the vortex process. |
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| Keywords: | vortex cavitation numerical simulations highspeed photographs shear layer hollowjet valve |
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