2次元物体および円板に発生するキャビテーションとその諸特性

概要

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A lot of theoretical models has been proposed to calculate flow field around cavitating bodies. However, calculation results by linearized cavity flow theory do not agree well with experimental results. Almost of all cavitations around bodies are not stable even if in the uniform flow. According to this fact, it is too difficult to choose a suitable theoretical model. To make a contribution to this problem, the author discussed the characteristics of cavitation around various kinds of bodies in a uniform flow. Roughly speaking, the transition of the cavitation can be classified into some stages. In the case of wedged shaped bodies, the transition can be classified into the stages as follows; Stage i) Occurence of bubbles, Stage ii) Unstable cavitation, Stage iii) Stable super cavitation. In the case of streamlined bodies, the stages are as follows; Stage i) Sheet cavitation, Stage ii) Developing sheet cavitation (unstable), Stage iii) Stable super cavitation. The relationships between the length of cavitation and the cavitation condition on various hydrofoil sections are also presented in this report.
独立行政法人海上技術安全研究所の論文
1979-11-30