Axial Wake Survey behind a Fishing Vessel Model by Using a Wedge-Shaped Hot-Film Probe

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  • WU Shukai
    Faculty of Eng. & Applied Science, Memorial Univ. of Newfoundland
  • BOSE Neil
    Faculty of Eng. & Applied Science, Memorial Univ. of Newfoundland

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  • Axial Wake Survey behind a Fishing Vess

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Difficulties with the calibration and operation of hot-film anemometers in water have prevented their widespread application for towing tank measurements. The potential advantages for measurements such as ship model wake surveys, in terms of their accuracy compared with pitot tubes and their low cost compared with laser-doppler anemometry, have yet to be fully exploited. To this end, a series of calibration experiments with several hot-film probes was done in a towing tank to investigate their calibration characteristics. A nominal wake survey experiment was conducted behind a model of a Newfoundland fishing vessel form by using a wedge-shaped single sensor hot-film probe. The experiment is described. Results obtained of the mean and turbulent axial velocity components within a half propeller disk are presented. The model was towed at a speed of 1.45m/s, which corresponded to a Froude number of 0.33 and full scale vessel speed of 6.4 knots. Techniques associated with use of hot-film probes for wake survey experiments are discussed. The present results indicate the feasibility and potential of hot-film anemometry as a practical, economical, and accurate tool for towing tank applications.

収録刊行物

  • 関西造船協会誌

    関西造船協会誌 218 (0), 29-40, 1992

    公益社団法人 日本船舶海洋工学会

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