流体机械

2020, v.48;No.579(09) 29-34

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柱塞式调节阀壁面粗糙度对流量系数影响的数值模拟研究
Numerical Simulation of Influence of Wall Roughness on Flow Coefficient of Plunger Regulating Valve

王洪申;张家振;陈杰;
Wang Hongshen;Zhang Jiazhen;Chen Jie;Lanzhou University of Technology;Weidouli Special Valve Co.,Ltd.;

摘要(Abstract):

以通径为50 mm的柱塞式调节阀为研究对象,通过改变壁面粗糙度,并通过CFD软件Ansys Fluent对仿真模型进行流量系数的稳态研究,得到了流量系数随相对开度和壁面粗糙度的变化关系。将数值仿真结果与理论结果和试验结果作对比,仿真结果与理论曲线的变化趋势一致,可以得出该阀门符合等百分比的流量特性;仿真结果与试验结果比较,发现在小开度和大开度时误差较大,整体上吻合度较高。分析壁面粗糙度为0,100,200和300 μm的流量系数,可以得出在小开度和大开度时,粗糙度对流量系数的影响较大,这为调节阀制定合理的调节范围奠定了理论基础。
With the plunger type regulating valve with the diameter of 50 mm as the research object,by changing the wall roughness and using the CFD software Ansys Fluent to study the steady state of the flow coefficient of the simulation model,the change relationships of the flow coefficient with the relative opening degree and wall roughness were obtained.The numerical simulation results were compared with the theoretical results and the experimental results.The simulation results were consistent with the change trend of the theoretical curve.Thereby it can be concluded that the valve meets the equal percentage flow characteristics.When the simulation results were compared with the experimental results,it was found there are big errors at small opening and wide opening,but the overall coincidence was high.The flow coefficient of wall roughness of 0,100,200 and 300μm was analyzed.It can be concluded that the roughness has a great influence on the flow coefficient at small opening and large opening,which lays a theoretical foundation for establishing a reasonable range of regulation of the valve.

关键词(KeyWords): 粗糙度;调节阀;流量系数;CFD;数值模拟
roughness;regulating valve;flow coefficient;CFD;numerical simulation

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作者(Author): 王洪申;张家振;陈杰;
Wang Hongshen;Zhang Jiazhen;Chen Jie;Lanzhou University of Technology;Weidouli Special Valve Co.,Ltd.;

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