ベンチュリ管内に発生するキャビテーション・***ージョンに関する一考察

概要

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Cavitation erosion generated in the venturi facility was studied by comparing the erosion loss with the distributions of cavitation bubble collapse pressures (impact loads). The erosion process in the venturi facility is similar to that in a vibratory device although its progress is very slow. That is, the surface first deforms and fractures due to the fatigue by repeated bubble collapse pressures below the critical pressure which impulsively forms a pit. Comparing the distributions of impact load measured using our method with the hypothetical S-N curves of fatigue, Miner's law is realized for the incubation period and the volume loss rate during stable period regardless of the venturi, vibratory and cavitation conditions and materials. Therefore, We found that the estimation of cavitation damage in a flow system is possible uniformly with those in the vibratory method from Miner's law although the distributions of cavitation bubble collapse pressures are markedly different.
一般社団法人日本機械学会の論文
1990-03-25