EXPERIMENTAL INVESTIGATION OF CAVITATION IN A SUDDEN EXPANSION PIPE  

作　　者：ZHANG Jian-min YANG Qing WANG Yu-rong XU Wei-lin CHEN Jian-gang 

机构地区：[1]State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China

出　　处：《Journal of Hydrodynamics》2011年第3期348-352,共5页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Key Basic Research and Development Program of China (973 Program,Grant No.2007CB714105);the National Science and Technology Pillar Program of China (Grant No. 2008BAB29B04);the Science Foundation of Ministry of Education of China (Grant No.2008108111);the Program for New Century Excellent Talents in University (Grant No.NCET-08-0378)

摘　　要：For sudden expansion pipes, experiments were carried ＇Out to study the cavitation inception for various enlargement ratios in high speed flows. The flow velocity of the prototype reaches 50 m/s in laboratory. The relationship between the expansion ratio and the incipient cavitation number is obtained. The scale and velocity effects are revealed. It is shown that Keller＇s revised formula should be modified to calculate the incipient cavitation number when the forecasted velocity of the flows in the prototype exceeds the experimental velocity.For sudden expansion pipes, experiments were carried ＇Out to study the cavitation inception for various enlargement ratios in high speed flows. The flow velocity of the prototype reaches 50 m/s in laboratory. The relationship between the expansion ratio and the incipient cavitation number is obtained. The scale and velocity effects are revealed. It is shown that Keller＇s revised formula should be modified to calculate the incipient cavitation number when the forecasted velocity of the flows in the prototype exceeds the experimental velocity.

关 键 词：high speed flows sudden expansion pipe cavitation incipient scale effect 

分 类 号：N33[自然科学总论] TU821.5[建筑科学]