C321 マイクロ熱膜センサ群を用いたチャネル乱流における壁面せん断応力の多点同時計測

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  • Multiple point measurement of wall shear stress in a turbulent channel flow with arrayed micro hot-film sensors.

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Arrayed V-shaped hot-film shear stress sensors for active feedback control of wall turbulence were developed with the aid of the microelectromechanical (MEMS) technology, and their response was examined in a turbulent channel flow. The turbulent statistics obtained are deteriorated due to the finite spacing between hot films, uneven characteristics among sensors, and the imperfect frequency response of the sensor. However, the characteristics of the near-wall coherent structures, such as the meandering of the lowspeed streaks are successfully captured.

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