An experimental study has been performed on the interaction of uniform shear with streamline curvature of turbulent flows. For this experiment, a uniform shear flow of either positive or negative gradient is generated at the inlet of a 90 curved duct by a uniform shear generator.
Streamwise mean velocities, turbulent intensities in the streamwise and the transverse directions and Reynolds shear stress were measured along the downstream distance. The integral length scale, Taylor microscale and streamwise energy spectra were also obtained.
The trend of wall static pressure variation under the two inlet conditions is found to be different from each other. All the Reynolds stress components both normal and shear along the streamwise direction are increased with the inlet of negative uniform shear, and for the inlet condition of positive shear, vise versa.
More data need to be accumulated to investigate the effect of the interaction between mean shear and streamline curvature on the integral length and time scale variations, and the third-order transport mechanisms of the streamline curved turbulent flow field.
