Experimental and theoretical performance of a supercavitating hydrofoil operating near a free surface

Experimental and theoretical performance of a supercavitating hydrofoil operating near a free surface. Scherer, J. O. & Auslaender, J. Journal of Aircraft, 2(2):144–152, 1965.
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Results of lift and drag measurements performed on a 5-in. chord model of the BuShips parent hydrofoil are presented and compared with theoretical predictions. The tests were conducted in the high-speed, variable-pressure, free-surface, circulating water channel at Hydronautics, Inc. They cover angles of attack ranging from 3� to 15�, vapor cavitation numbers from 0.06 to 2.34, depths of submergence of J and 1 chord, and velocities from 30 to 52 fps. It is found that, at vapor cavitation numbers that are low enough to approach prototype values, the ventilation hysteresis is eliminated. Results are presented in the form of tables and graphs of lift and drag coefficients for variations of angle of attack and vapor cavitation numbers. Good agreement is found between theory and experiment. The problems of ventilation inception are also discussed.

@Article{Scherer1965,
    author      = {Scherer, J. O. and Auslaender, J.},
    title       = {Experimental and theoretical performance of a supercavitating hydrofoil operating near a free surface},
    doi         = {10.2514/3.43631},
    issn        = {15333868},
    journal     = {Journal of Aircraft},
    number      = {2},
    pages       = {144--152},
    volume      = {2},
    year        = {1965},
    abstract    = {Results of lift and drag measurements performed on a 5-in. chord model of the BuShips parent hydrofoil are presented and compared with theoretical predictions. The tests were conducted in the high-speed, variable-pressure, free-surface, circulating water channel at Hydronautics, Inc. They cover angles of attack ranging from 3� to 15�, vapor cavitation numbers from 0.06 to 2.34, depths of submergence of J and 1 chord, and velocities from 30 to 52 fps. It is found that, at vapor cavitation numbers that are low enough to approach prototype values, the ventilation hysteresis is eliminated. Results are presented in the form of tables and graphs of lift and drag coefficients for variations of angle of attack and vapor cavitation numbers. Good agreement is found between theory and experiment. The problems of ventilation inception are also discussed.}
}

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