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Measurements of the Two-point Autocorrelation and Spectral Shear Correlation Coefficients in a Perturbed Turbulent Boundary Layer
並列摘要
Measurements of the two-point autocorrelation and spectral shear correlation coefficients have been made in a turbulent boundary layer subjected to a concentrated suction, applied through a porous wall strip. The results indicate that suction weakened the near-wall structures, as reflected in the changes in the autocorrelation coefficients relative to those for non-suction. Due to the stabilization of the near-wall flow by suction, the spanwise size of the initial structures is diminished. The changes in the large-scale motion of the suction and no suction is felt down to the smallest scales, as observed in the lack of collapse of the spectral shear correlation coefficient.
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