キャビテーション衝撃圧に対する寸法効果

概要

論文の詳細を見る
As a first step to clarifying the mechanism of scale effects on cavitation erosion, cavitation-induced shock pressure pulses were carefully investigated around four similar flat hydrofoils, from 53mm to 160mm in a chord length C, under a so-called"true similar conditions"of the same flow velocity, incidence and cavitation number as well as almost the same nuclei distribution in the test water, within the subcavitation region. Under these similar conditions, no marked scale effects on the mean pressure are recognized. When C is large, very large U-shaped vortex cavitation bubbles grow and predominantly collapse, resulting in very high locally concentrated pressure pulses on the foil surface. On the other hand, a large number of moderate pressure pulses attack the surface in a smaller C.
社団法人日本機械学会の論文
1988-10-25