Flow Behaviour Analysis and Experimental Investigation for Emitter Micro-channels

作     者：WEI Zhengying CAO Meng LIU Xia TANG Yiping LU Bingheng 

作者机构：State Key Lab for Manufacturing System Engineering Xi 'an Jiaotong University Xi 'an 710049 China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2012年第25卷第4期

页      面：729-737页

核心收录：

学科分类：080706[工学-化工过程机械] 080701[工学-工程热物理] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by National Natural Science Foundation of China (Grant Nos. 50675172,50975227) Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No.FANEDD200740) National Hi-tech Research and Development of China (863 Program,Grant No. 2011AA100507-04) 

主　　题：drip irrigation emitter labyrinth channel two-phase flow analysis anti-clogging micro-PIV 

摘      要：The existing research of the flow behavior in emitter micro-channels mainly focuses on the single-phase flow *** the recent micro-particle image velocimetry（PIV） experimental research on the flow characteristics in various micro-channels mainly focuses on the single-phase fluid ***,using an original-size emitter prototype to perform the experiments on the two-phase flow characteristics of the labyrinth channels is seldom *** this paper,the practical flow of water,mixed with sand escaped from filtering,in the labyrinth channel,is *** some research work on the clogging mechanism of the labyrinth channel＇s structure is *** fluid dynamics（CFD） analysis has been performed on liquid-solid two-phase flow in labyrinth-channel *** on flow visualization technology-micro-PIV,the flow in labyrinth channel has been photographed and *** path line graph and velocity vector graph are obtained through the post-treatment of experimental *** graphs agree well with CFD analysis results,so CFD analysis can be used in optimal design of labyrinth-channel *** the optimized anti-clogging structures of the rectangular channel and zigzag channel have been designed *** CFD numerical simulation and the micro-PIV experiments analysis on labyrinth-channel emitter,make the ＂black box＂ of the flow behavior in the emitter channel ***,the proposed research promotes an advanced method to evaluate the emitter＇s performance and can be used to conducting the optimal design of the labyrinth-channel emitters.