单内齿灌水器齿宽对其抗堵塞性能的影响  

Influence of Tooth Width of Single Internal Tooth Emitter on Its Anti-clogging Performance

作　　者：郭市政 张传杰 郭彬[2] 朱宏志 耿文哲 池津吉 GUO Shi-zheng;ZHANG Chuan-jie;GUO Bin;ZHU Hong-zhi;GENG Wen-zhe;CHI Jin-ji(Farmland Irrigation Research Institute,Key Laboratory of Water Saving Irrigation Project of Ministry of Agriculture,Xinxiang 453002,Henan Province,China;College of Water Conservancy and Civil Engineering,Shandong Agricultural University,Tai'an 271018,Shandong Province,China)

机构地区：[1]中国农业科学院农业部节水灌溉工程重点实验室,河南新乡453002 [2]山东农业大学水利土木工程学院,山东泰安271018

出　　处：《节水灌溉》2022年第6期66-71,共6页Water Saving Irrigation

基　　金：中国农业科学院基本科研业务费项目(FIRI2018-04)。

摘　　要：采用CFD数值模拟的方法,选取标准k-ε湍流模型以及欧拉-拉格朗日的多相流模型对迷宫流道灌水器流道的抗堵塞性能进行研究。将矩形灌水器流道进行加齿设计,分析齿宽的改变对流道内流体的流速分布、漩涡特性和颗粒运动轨迹的影响机理。研究表明:齿宽为0.6 mm和齿宽为0.8 mm的流道的低速区较少;齿宽为0.8 mm的流道的漩涡分布较少,且多位于加齿两侧和者直角拐角处,对该区域的流道壁面有良好的冲刷作用;通过分析颗粒在灌水器内的运动轨迹可以看出,当齿宽为0.8 mm时,颗粒在流道内的运动轨迹较规律且停留时间相对较短,齿宽为0.4 mm的灌水器颗粒在其流道内进行了“打转”运动。综合考虑,齿高为0.5 mm的单内齿灌水器中,齿宽为0.8 mm的灌水器的抗堵塞性能较优。In this paper, the standard k-ε turbulence model and Euler-Lagrange multiphase flow model were selected to study the anti-clog performance of labyrinth channel emitter by CFD numerical simulation. The flow channel of rectangular emitter was designed to add teeth,and the influence mechanism of the change of tooth width on the flow velocity distribution, vortex characteristics and particle trajectory in the flow channel was analyzed. The results show that low velocity region of the channel with 0.6 mm and 0.8 mm tooth width is less. The vortex distribution of the flow channel with the tooth width of 0.8 mm is less, and most of them are located at the right Angle corner of the two sides of the tooth, which has a good scouring effect on the flow channel wall in this area. By analyzing the trajectory of particles in the emitter, it can be found that when the tooth width is 0.8 mm, the trajectory of particles in the flow channel is more regular and the residence time is relatively shorter. The emitter particles with 0.4 mm tooth width are ′ turned ′ in the flow channel. In general, for the single internal tooth emitter with tooth height of 0.5 mm, the emitter with tooth width of 0.8 mm has better anti-clogging performance.

关 键 词：迷宫灌水器 齿宽 两相流 数值模拟 k-ε湍流模型 

分 类 号：S275.6[农业科学—农业水土工程]