管道中非定常流动的计算分析  

ANALYSIS AND CALCULATION OF UNSTEADY FLOW IN PIPE

作　　者：胡开文[1] 

机构地区：[1]合肥经济技术学院机电工程系

出　　处：《农业机械学报》1999年第5期28-31,共4页Transactions of the Chinese Society for Agricultural Machinery

摘　　要：对管道中非定常流动进行了研究，导出了流体在管道中流动时，实用的特征线法的计算方法和公式。该方法是从Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程和连续性方程出发，结合流体实际流态状况及摩擦损失函数等，将难以求解的流体偏微分方程组转换为便于工程数值计算的等价差分方程组，从而解决了液压管道中液体非定常流动的计算问题。它能很好地满足实际工程计算需要。A practical formula of the characteristic line method was derived from the Navier Stokes and the continuity equations for unsteady flow in pipes. It can be used to calculate friction loss for all kinds of flow pattern, such as laminar, turbulent, steady and unsteady flows. The method can be applied in complex pipe systems with various boundary conditions to evaluate friction losses and local losses generated by both laminar and turbulent flows. It can also be employed in some complex situations, such as steam cavitation, separation of liquid and column, and so on. So, it is a powerful method to solve dynamic problems of hydraulic systems.

关 键 词：非定常流动 特征线法 数值计算 管道 液体管道 

分 类 号：U173.91[交通运输工程]