EXPERIMENTAL INVESTIGATION OF CAVITATION IN A SUDDEN EXPANSION PIPE

• 作 者: ZHANG Jian-min YANG Qing WANG
• 机 构: State Key Laboratory of Hydraulics and Mountain River Engineering
• 出 处: 水动力学研究与进展B辑
• 发表日期: 2004年期
• 关键词: high speed flows sudden expansion pipe cavitation incipient scale effect
• 基金项目: Project supported by the National Key Basic Research and Development Program of China (973 Program;the Program for New Century Excellent Talents in University;the National Science and Technology Pilla

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 Kellers 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.