インデューサの揚程低下時に発生する高次の旋回キャビテーション(流体工学,流体機械)

概要

論文の詳細を見る
The characteristics of cavitation instabilities were investigated through the measurements of pressure and blade stress fluctuations. Under the condition of head break down at lower cavitation number, a higher order rotating cavitation was observed. It can be understood in two ways : 2 cells with forward propagation velocity ratio of 4, or 1 cell with backward propagation speed ratio of 5. From high-speed video pictures, it was found that the cavity in the tip leakage flow fluctuates mainly near the trailing edge. It causes pressure and blade stress fluctuations near the trailing edge. These characteristics are different from those of conventional rotating cavitation at higher cavitation number. Higher order cavitation surge with the frequency ratio of 5.1 was also observed under the same condition.
社団法人日本機械学会の論文
2003-02-25