利用空化现象进行水喷射泵转子叶片尖区流场结构的可视化研究

2012/07/13   下载量： 4 次

方案摘要

方案下载
应用领域 其他
检测样本 其他
检测项目
参考标准 暂无

In this paper, we examine the occurrence of cavitation in the tip region of a waterjet pump, and use the observations to identify key features of the flow structure. The rotor, stator and pump casing in our recently upgraded facility are made of acrylic, whose refractive index matches that of the working fluid, a concentrated aqueous solution of sodium iodide. Such matching makes the blades invisible, enabling flow structure visualization and optical measurements without any obstructions. Our initial tests with fresh water focus on cavitation in the vicinity of the tip region close to design conditions. Near the leading edge, cavitation inception near the tip corner of the pressure side causes accumulation of bubbles along the pressure side of the corner until mid blade. As roll-up of the tip leakage vortex (TLV) starts in the mid blade region, these bubbles travel across the tip-clearance to the suction side, and become nuclei for cavitation inception in the TLV. As the TLV migrates to the vicinity of the pressure side of the neighboring blade it bursts, generating a cloud of bubbles that spreads over most of the aft section of the passage. The leakage flow in the tip gap along the aft side of the blade is strong enough to cause sheet cavitation within the gap, starting from the pressure side corner. The paper also presents preliminary Particle Image Velocimetry (PIV) data concentrating on the roll-up of TLV. Results are consistent with observed cavitation phenomena.

方案下载
配置单
上一篇 在一个双稳湍流涡旋火焰中，对间歇性动态的时间-频率定位
下一篇 实验空化混合层的速度场分析

文献贡献者

北京欧兰科技发展有限公司
金牌会员 丨 第17年
查看全部资料
相关仪器 更多
相关方案
更多

相关产品

当前位置： 欧兰科技 方案 利用空化现象进行水喷射泵转子叶片尖区流场结构的可视化研究

关注

拨打电话

留言咨询