ベンチュリ管内に発生するキャビテーション気泡崩壊圧

概要

論文の詳細を見る
The cavitation bubble collapse pressures (impact loads) in a venturi facility were measured with a piezoelectric detector and were analyzed statistically. The generating number of impact pulses is very small, but larger impact pulses occur compared with the results obtained by a vibratory facility. When the distributions of impact loads are compared to the erosion pit sizes on the surface of mild steel and copper, a lower critical impact load which forms impulsively a pit is almost the same regardless of cavitation conditions. The impact energy that contributes to the pit initiation, which is calculated by integrating the pulse heights above the critical impact pulse, shows maximum value at a given cavitation number (σ=0.68) and is proportional to the 4.3 and 6.3 th power of the fluid velocity for copper and mild steel, respectively.
一般社団法人日本機械学会の論文
1989-03-25