基于含沙量等值线的迷宫流道结构抗堵塞设计与模拟

以提高迷宫流道灌水器的抗堵塞能力为目的，以齿型流道结构的灌水器为主要研究对象，首先应用计算流体力学（computational fluid dynamics）二相流模拟方法分析了迷宫流道灌水器的水力性能，重点模拟了含沙量在流道内的分布规律，提出了以较小的含沙量等值线为流道边界对流道进行优化设计的方法，通过对2次优化后的流道结构进行二相流数值模拟，发现优化后流道的含沙量分布较原型流道的含沙量分布更加均匀，大量固体颗粒集中在进出口附近流道单元壁面的现象基本消除，流道优化设计后灌水器的抗堵塞性能得到显著改善。其次，对优化结果进行了标准化设计，制作了原型与标准化模型片式滴头，生产了测试滴灌带。最后，分别对2种滴头进行了水力性能测试与抗堵塞试验，验证了数值模拟结果。结果表明：以较小的含沙量等值线作为流道基本边界进行流道抗堵塞优化设计与标准化设计获得的流道，保持了原型流道的优良水力性能，改善了抗堵塞性能，使用寿命是原型的2倍。

Anti-clogging experimental investigation and optimized design of micro-channels of emitter based on isoline of sand content

Emitter with tooth-labyrinth paths was main research subject.The distribution law of sand content and hydraulic performance of emitter were analyzed by CFD(computational fluid dynamics)two-phase simulation technology firstly.The optimal design method of labyrinth paths was proposed that the lesser isoline of sand content was regarded as the borderline of labyrinth paths.According to the results of two-phase CFD simulation on the optimal structure,the sand content of labyrinth paths by optimized was more uni...