不同内齿结构的迷宫流道特性分析和结构优化  

Characteristic analysis and structure optimization of labyrinth flow channels with different internal tooth structures

作　　者：朱正 袁锐波[1,2] 陈有锦 罗威 杨肖 曹志鹏 ZHU Zheng;YUAN Ruibo;CHEN Youjin;LUO Wei;YANG Xiao;CAO Zhipeng(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650504,China;Institute of Hydromechatronics System Integration and Control,Kunming 650504,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650504 [2]光机电液系统集成与控制研究所,昆明650504

出　　处：《重庆理工大学学报（自然科学）》2023年第4期348-358,共11页Journal of Chongqing University of Technology：Natural Science

基　　金：云南省重大科技专项计划(202202AC080008)。

摘　　要：通过分析对比在不同条件下、不同内齿结构的灌水器迷宫流道内流场的流动特性和堵塞成因,得出具有更优抗堵塞性能的流道结构,结合FLUENT数值模拟,分析在3种不同内齿结构(矩形、三角形、弧形)以及不同内齿组合形式(单内齿、双内齿、组合内齿)迷宫流道中的流速特性和湍动能特性,同时研究在3种不同的压力条件下(0.06、0.11、0.15 MPa)以及3种不同粒径颗粒(0.05、0.085、0.130 mm)的运移状况等。分析结果表明:相较于其余8种流道结构,在抗堵塞性上组合型三角形内齿结构为最优流道结构。对比改进前的组合型三角形内齿流道,优化改进后,流道流速和湍动能均明显提升,不仅增大了流体在流道中保持和运行湍流状态的能力,而且提高了低速区的流速和湍动能在流道的范围和数值大小,更加便于颗粒运移,抗堵塞性能更好。结果表明:流道内各划分区域的流速、湍动能和颗粒运移速率都受流道的结构参数影响;加入内齿面积的大小影响内齿流道的抗堵塞性能,对比分析仿真模拟的各项数据得出最优流道内齿组合方式为组合型,最优内齿结构为三角形内齿。With continuous improvement,drip irrigation technology has gradually been widely used in the field of agricultural planting.The emitter is the core component of the drip irrigation system,and the main reason hindering the development of the emitter is that the structure of the emitter flow path is narrow,which increases the amount of its irrigation time.Simultaneously,blockage occurs.The article reports a study on the flow characteristics and clogging causes of labyrinth channels with different internal tooth structures under different conditions,aiming to find a channel structure with better anti-clogging performance.This paper uses FLUENT numerical simulation analysis to compare the velocity and turbulent kinetic energy characteristics of three different internal tooth structures(rectangular,triangular and arc)and different internal tooth combinations(single internal teeth,double internal teeth and combined internal teeth),and,combined with the DPM stochastic orbital model,studies the migration under three different pressure conditions(0.06 MPa,0.11 MPa and 0.15 MPa)and with three different particle sizes(0.05 mm,0.085 mm and 0.130 mm).The indicators of the hydraulic performance of the emitter are the turbulent kinetic energy of the flow channel,the intensity of the low-turbulent kinetic energy area or low-velocity area in the flow velocity,and the distribution of the dissipation rate of the turbulent kinetic energy of the flow channel;the indicators of the anti-clogging performance of the emitter are based on the fluid-solid.The particle migration path and particle residence time in the flow channel are obtained from the two-phase(DPM stochastic trajectory model)analysis,and the influence of the parameters of the labyrinth flow channel with different internal tooth structures on the performance of the emitter is studied under numerical simulation.Combined with the above analytic conclusions,a labyrinth flow channel with internal teeth is designed with better performance.The results show that,among different co

关 键 词：灌水器 不同内齿结构流道 湍动能 数值分析 涡旋区 抗堵塞 

分 类 号：TE973[石油与天然气工程—石油机械设备]