圆柱型灌水器迷宫式流道内部流体流动分析与数值模拟  

Analyzing and modeling flow regime in labyrinth path drip irrigation column emitter with CFD

作　　者：李云开[1] 杨培岭[1] 任树梅[1] 王勇[1] 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083

出　　处：《水动力学研究与进展（A辑）》2005年第6期736-743,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(50379053);"863"重大专项(2002AA6Z3091)

摘　　要：要想设计出高性能的滴灌灌水器必须对其内部流动机理有一个全面的了解,迷宫式流道狭窄且边界极为复杂,原型试验在技术和经济上都比较困难,常规手段难以满足流场测试要求,基于计算流体动力学理论的数值仿真研究流道内部流体流动问题是一种行之有效的方法。通过对迷宫式流道内部流体流动特性的分析,构建了表征迷宫式流道内部流动的数学物理模型;对所选取的目前中国农业灌溉领域最为典型的三种圆柱型灌水器,借助FLUENT6.1 CFD流场软件分析平台实现了流道内部流速分布、涡量分布、紊流强度分布等流动特性的可视化,为新型灌水器流道研制提供一定理论基础。The labyrinth emitter was with the most advanced performances, but the theories and methods for designing its flow path have been strictly confidential and the researches with the function of practical guidance have seldom been published. The flow characteristics in the flow path of emitters must be understudied roundly in order to design an emitter with high performances. But the labyrinth path was very narrow and complex, and the archetype experiment of the emitters was unreasonable both in the technology and the economy. The flow regime in it couldn＇t he displayed clearly with the traditional equipments, and the numerical simulation with CFD（Computation Fluid Dynamics）was a effective method. Based on the analysis of the flow characteristic within the flow path, the physics models describing the flow process in the labyrinth path were formed. The velocity, vorticity and the turbulence intensity distributing within the three typical column labyrinth path emitter were visualized via the FLUENT 6.12. It will afford some theory basis for designing the new emitter.

关 键 词：滴灌灌水器 计算流体动力学 迷宫式流道 流动 数值模拟 

分 类 号：TV134[水利工程—水力学及河流动力学] O242.1[理学—计算数学]