【摘要】 本文给出在不同的正交座标系内,二维湍流速度的一阶和二阶统计量的变换公式。用这些公式和一台一维激光多普勒测速计,测量了方形管道中水流的二维湍流速度脉动的均方值和雷诺切应力。更多还原

【Abstract】 Formulas which transfer the first and second order statistics of 2-D turbulent velocities from one orthogonal coordinate system to another have been given in this paper. Using these formulas and a 1-D LDA, mean square value of 2-D turbulent velocity fluctuation and Reynolds shear stress have been measured for water flow in a square duct.更多还原