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

摘要： 针对灌水器易堵塞的问题，以AutoCAD和ANSYS相结合的方法建立了滴灌管式灌水器迷宫流道的CFD数值模型，并对国内常用的方形迷宫流道灌水器的压力流量关系、流道内部的压力和流速分布进行了数值模拟计算。结果表明,迷宫流道内压力沿流道长度呈线性变化,流道齿尖两端都有不同程度的流动滞止区。经过对比分析，根据流道中主流体的流线形状分布重新设计了流道的结构，并进行仿真分析，结果证明流道结构得到了优化，提高了迷宫灌水器的抗堵能力。数值模拟也为灌水器水力性能的进一步研究及一体化灌水器的快速开发提供理论基础。

关键词: 灌水器 , 迷宫流道 , 抗堵能力 , 数值模拟