超高速スーパキャビテーション翼形の揚抗力測定時における円盤抗力の特異な挙動

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  • Peculiar Behavior of Disc Drag During Force Measurements for Supercavitating Hydrofoils.
  • チョウコウソク スーパ キャビテーション ヨクガタ ノ ヨウコウリョク ソクテ

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In order to make precise force measurements for supercavitating hydrofoils, behavior of the disc drag, as well as the effects of the gap between the test foil and the facing side-wall, is carefully investigated for three typical supercavitating hydrofoils whose nose shapes are modiffied slightly, in a wider range of cavitation number, for various incidences and gap distances. Unexpectedly from Numachi's disc-drag-experiments, the disc drag significantly decreases within the transient region from the subcavitating region to the supercavitating region. It is also very sensitive to foil shapes as well as incidences.

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