超空洞円環翼の揚力面解析

概要

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The lifting-surface analysis for the axially symmetric flow and on the other, the lifting-line analysis for the axially non-symmetric flow are presented by singularity method for the super-cavitating circular ring hydrofoils. Main contents are enumerated as follows (1) Comparing the simultaneous integral equations in two limiting cases of large and small aspect ratios with the corresponding ones in two and three dimensional super-cavitating hydrofoils respectively, certain inherent features to the axially symmetric flows are clarified in relation to the aspect ratio and cavity length. Confirmations are made for the present analysis by comparing the predicted pressure distribution and normal forces with the experimental ones. (2) In case of the axially non-symmetric flows, the lifting-line analysis based on the semi-axially symmetric approximation is shown to be most reliable of the three proposed methods. Therefore the circumferential distributions of the local cavity length and local circulation and also the overall lift, induced drag and cavity drag are examined in relation to the aspect ratio and cavitation number through numerical examples.
一般社団法人日本機械学会の論文
1991-01-25