T型三通管水力特性的数值模拟与试验研究  

Numerical simulation and experimental study on hydrodynamic characteristics of T-type pipes

作　　者：陈江林[1] 吕宏兴[1] 石喜[1] 朱德兰[1] 王文娥[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,杨凌712100

出　　处：《农业工程学报》2012年第5期73-77,I0001,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家"863"计划项目(2010AA10A302);国家自然科学基金资助项目(50909083)

摘　　要：为研究T型三通管水流的流动特性,该文进行了试验研究和数值模拟。试验中使用压力传感器监测管道动水压强,数值模拟采用SIMPLEC的求解方法求解Navier-Stokes方程和κ-ε湍流方程。分析不同工况下水头损失的产生机理,得到了不同分流比、入口流速、管径比对水头损失系数的影响:单管通水时水头损失系数比双管通水时的水头损失系数约大1.01～1.94倍,当入口雷诺数Re相同时垂直支管的水头损失系数比水平支管的水头损失系数约大2.20～2.55倍,不同管径比对垂直支管的水头损失系数影响不明显,水平支管的水头损失系数随管径比的增大而减小。研究结果表明,数值模拟结果与试验结果吻合较好,得出的结果对工程有指导意义。In order to research flow characteristics of T-type pipeline,experiments and numerical simulations were conducted.Pressure sensors were used to monitor the dynamic water pressure of the pipeline,and SIMPLEC method was applied to solve the Navier-Stokes equations and the κ-ε turbulence equation in Numerical simulation.Mechanism of pressure loss under different operating cases were analyzed,and impacts of different split ratios,entrance velocities,length-diameter ratios on head loss coefficient were obtained.The head loss coefficient of single tube was 1.01-1.94 times larger than that of double-pipe.The pressure loss coefficient of vertical branch pipe was 2.20-2.55 times larger than that of horizontal branch pipe given same inlet Re.The influence of different length-diameter ratio on head loss coefficient of the vertical branch pipe was not obvious,while the head loss coefficient of the horizontal branch increased with decrease of length-diameter ratio.The numerical simulation results accord with the experimental results well,and they are instructive to project applications.

关 键 词：管道 模拟 试验 水头损失系数 分流比 管径比 

分 类 号：S224.1[农业科学—农业机械化工程]