【摘要】 本文采用激光流速仪对光滑、过渡和粗糙明渠紊流结构进行了系统的试验研究。根据试验成果,分析了上述紊流特点,指出了明渠时均结构和脉动结构与壁面粗糙的关系,对粗糙管道、明渠和天然河流中的水流脉动结构进行了分析比较。最后,文中对随机理论的明渠紊流时均结构和脉动结构表达式进行了初步验证。更多还原

【Abstract】 In the paper the results of systematic measurements on the turbulent structure of channel flows, including those in smooth, transition and rough regions, are presented and analyzed in details. For turbulent intensities, the formulas (1-2) and (3-2) given by Dou Guoren on the basis of stochastic theory of turbulent shear flow are compared with the experimental data and the result of eomparison shows that both formulas can be applied not only to the smooth region, but also to the transition and rough regions.更多还原