论文部分内容阅读
边界切应力横向分布方程的建立，源自于仅包括次生雷诺（Reynolds）应力项的简化河流涡度方程，方程中应用一个通用函数模拟横向的不均匀性。通过动全传递模型，考虑了二次流对边界切应力的影响。根据这些分析，提出了描述横向边界切应力分布的经验公式，应用方形管道中切应力的实测数据量化经验公式中的一些系数。随后．将模型应用于矩形管道和明渠的拐角区域，借助于对河流涡度方程的那些简化和近似，求得的预测结果是合理的。
The establishment of a transverse shear stress boundary distribution equation results from a simplified river eddy equation that includes only the secondary Reynolds stress term. A generic function is used to simulate lateral inhomogeneities in the equation. Through the dynamic transfer model, the effect of secondary flow on the boundary shear stress is considered. Based on these analyzes, an empirical formula describing the transverse shear stress distribution is proposed, and some coefficients in the empirical formula are quantified using measured data of shear stress in a square pipe. Then. Applying the model to the corner area of rectangular pipes and open channels, the predictions obtained are reasonable with the help of simplifications and approximations of the river vorticity equations.