翼端漏れ流れに生じる渦キャビテーションの研究

抄録

For a single blade with a tip clearance, tip leakage cavitations were observed experimentally for various cavitation numbers and angles of attack. In addition, to simulate the tip leakage vortex cavitation, a simple calculation of 2-D unsteady flow based on the slender body approximation was conducted with taking into account the effects of cavity growth. It was found that the calculation results showed qualitative agreement with experimental results for the cavity trajectory and radius of the tip leakage vortex cavitation. The effects of the angle of attack, cavitation number, blade loading, and tip clearance were simulated fairly well. Present calculation is expected to estimate the unsteady characteristics of the tip leakage vortex cavitation, which contributes substantially to the cavitation instability, such as the cavitation surge and rotating cavitation.