二次元曲がり流路内乱流に関する実験的研究 : 助走区間内の時間平均速度と多重速度相関

概要

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Introducing a turbulent flow fully developed in a straight parallel-plate channel into a two-dimensional curved channel with a radius ratio of 0.92, measurements were made in the entrance section on the time-mean velocity, nonzero components of kinematic turbulent stress and other one-point multiple velocity correlations. No significant steady Taylor-Gortler vortices are found and the flow field is completely two-dimensional throughout the entire region of the entrance section. When arranged with wall variables, the time-mean velocity and turbulent stress distributions in the vicinity close to the walls are slightly affected by the wall curvature, while the skewness and flatness of the velocity fluctuation are strongly affected by it. Triple velocity correlations follow a complicated progress to arrive at fully developed states. The results obtained can be used as a data base to verify various types of turbulence models.
社団法人日本機械学会の論文
1991-12-25