关键词: 灌水器 , 迷宫流道 , 抗堵能力 , 数值模拟

Abstract: According to the clogging problem of emitter, the computational fluid dynamics (CFD) numerical model for the labyrinth channels of drip irrigation emitters was established by used the method of combining AutoCAD with ANSYS. Computational fluid dynamics method was applied to calculate the relationship between the discharge and the pressure of the square labyrinth path irrigation emitter in ordinary use and the distributions of the pressure and velocity inside the emitter. The calculated results are that the pressure change in the emitter is linear with the length of the flow path and there are the flow stagnant areas at different degree between the two ends of the path tooth point. By compared and analyzed, the labyrinth path structure was redesigned in accordance with the streamline shape distribution of the main liquid in the path, and the simulation of the path was employed. So the structure of channel was optimized and the anti-clogging ability of the labyrinth irrigation emitter was improved. The computational simulation method could provide theoretical basis for the further study on the hydraulic performance of he irrigation emitter and the rapid development of the integral irrigation emitter.

Key words: Irrigation emitter,    , Labyrinth path,     , Anti-clogging ability,    ,  Numerical simulation