Wedge型ホットフィルム流速計による船尾乱流場の計測

概要

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The present paper concerns with a turbulence measurement in the stern flow field of a Series 60-0.6 C_B ship form. The measurement were carried out using a single channel slanted-wedge type hot-film velocimeter in a circulating water channel. The three components of mean velocity and six Reynolds-stress componets are obtained. It is found that the turbulence in ship stern is subject to a severe three dimensionality, and that the turbulence quantities show maximum values near the longitudinal vortex center. Also the turbulence intensities near water surface seem to be influenced by free surface effect. The distribution of mixing length at the stern indicates an influence of the longitudinal vortex. The Reynolds shear stress -<u'v'>^^^- is estimated by Cebeci and Smith's zero-equation model with a three-dimensional boundary layer calculation by Okuno's smethod. The comparison between the estimated result and the measured shows that the magnitudes are of the same order though the profiles in after-body sections show large difference.
社団法人日本船舶海洋工学会の論文
1984-06-30