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 。
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.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第10期62-64,89,共4页
Journal of Tsinghua University(Science and Technology)
基金
中国博士后科学基金资助项目 ( [2 0 0 0 ] 2 3)
