Turbulent Boundary-Layer along a Streamwise Bar of a Square Cross Section Placed on a Flat Plate

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概要

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• Turbulent boundary layer developing along a long streamwise bar with a square cross section placed on a flat plate was investigated experimentally. Measurements were made on the distributions of mean velocities, turbulence intensities and wall stresses. Main results obtained are as follows ; Near the streamwise edge and corner, secondary currents are generated whose directions near the bisectors are away from and toward the wall respectively. The wall region still exists near the edge and the corner, but the logarithmic straight part in the defect law representation undergoes an upward or downward shift. The Preston tube measurements showed that the mean value of the wall stress in the region affected by the bar agrees well with that in the two-dimensional region, which makes it possible to calculated the total frictional drag of this wall from the flat plate formula. usefulness of the approximated momentum integral equation in this case was examined using the experimental results.

• 一般社団法人日本機械学会の論文

著者

• Nakamura Ikuo

  Faculty Of Engineering Nagoya University

• Miyata Masafumi

  Faculty Of Engineering Nagoya University

• FURUYA Yoshimasa

  Faculty of Engineering, Nagoya University

• FUKUYO Yutaka

  Yamaha Hatsudoki Ltd.

• Furuya Yoshimasa

  Faculty Of Engineering Nagoya University

• Nakamura Ikuo

  Faculty Of Engineering. Nagoya University

• Nakamura Ikuo

  Faculty Mechanical Engineering Nagoya University

• FURUYA Yoshimasa

  Faculty of Engineering , Nagoya University

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