中文摘要：

为提高迷宫流道灌水器的抗堵塞性能,通过数值模拟的方法对梯形流道内含沙量分布以及水沙流速进行了分析,并采用PIV测试优化前后流道内颗粒运动轨迹和速度来进行验证。结果表明：梯形迷宫流道灌水器流道内高含沙量区域主要在迎水面且流速较低的位置,在优化流道时可适当增加迎水面的修改,结合流道整体和加工需求可适当、甚至不修改流道背水面尺寸;以某一含沙量分布线作为流道边界,通过多次数值模拟获得较低含沙量的流道后,进行标准化再选取流道较宽的流道。该方法基本消除了沙粒大量集中的现象,获得抗堵塞性能较好的流道模型。经水沙速度分析和PIV测试验证了该方法不仅保持了灌水器优化前的水力性能,而且抗堵塞能力得到了提高。

英文摘要：

In order to improve the reference of designing of anti-clogging ability of labyrinth channel emitter, the sand content and water and sand velocity distribution in the trapezoidal labyrinth channels were analyzed by CFD, the movement trajectories and velocity of solid particles in modified channel before and after tested by PIV. The phenomenon of a large number of solid particles concentrated on the surface near the upstream face and low velocity position of trapezoidal-channel emitters. When flow path is being modified, it is appropriate to increase the modification of the upstream face. Combined with the whole flow path and processing requirements, the downstream face may need not modified. Regarded the some one sand content distribution line as the borderlines of trapezoidal-channel to design the channel several times, after structural standardization and selecting the wide flow path, the position with high sand content can be canceled, and the better channel model is got. The method tested by CFD and PIV can keep the previous hydraulic performance before modification, and significantly improve the anti-clogging performance.