缝隙抽吸对二次水滴直径及直径分布影响的试验研究  

Experimental Study on Effects of Suction on Secondary Water Droplet Diameter and Its Distribution

作　　者：王新军[1] 高铁瑜[1] 徐廷相[1] 

机构地区：[1]西安交通大学叶轮机械研究所,西安710049

出　　处：《汽轮机技术》2004年第6期444-446,450,共4页Turbine Technology

基　　金：国家自然科学基金资助项目(No.50336050;No.50323001)。

摘　　要：在空气-水膜两相流动试验装置上,利用Malvern粒度分析仪对空心静叶缝隙抽吸和无抽吸条件下的静叶尾迹区二次水滴直径及直径分布进行了测量和分析。结果表明:缝隙抽吸可以有效地去除静叶表面上的流动液膜,大大减小了静叶尾迹区由于撕裂和二次雾化所形成的二次水滴直径;且水滴直径分布的范围较窄,有利于减轻或防止动叶的水蚀。In this paper, the tests were carried out on the air-water film two-phase flow test equipment. With and without suction slot, the secondary water droplet diameters as well as its distributions downstream of the hollow stationary blade were measured by Malvern Droplet and Particle Size Analysers. The results show that the water film flowing on the stationary blade surface can be removed by suction slot effectively, the diameter of the secondary water droplets formed by tearing and secondary spraying down stream of the stationary blade could be reduced largely and the diameter distribution become narrow. The results also show that the suction slot is beneficial to reduce or preventing the rotational blade erosion.

关 键 词：空心静叶 缝隙抽吸 二次水滴 直径和分布 

分 类 号：TK261[动力工程及工程热物理—动力机械及工程]