孔中心距对限流孔板压降的影响  

Influence of Hole Center Distance on Pressure Drop of Restriction Orifice

作　　者：王天豪 吉华[1] 李倩[1] 段宗幸 吴孙珂 WANG Tianhao;JI Hua;LI Qian;DUAN Zongxing;WU Sunke(School of Chemical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《机械》2020年第2期59-63,共5页Machinery

基　　金：四川大学德阳校市科技合作专项资金项目(2018CDDY-S18-DY)、横向项目(17H0784)。

摘　　要：为研究多级限流孔板(MHO)中布孔的中心距对压力降的影响,先根据设计标准计算出多级限流孔板的基本结构参数。在此基础上,基于Fluent的Standard k-ε湍流模型,建立了流体的三维数值计算模型,对降压作用最大的第一级限流孔板(MHO-1)的压降Δp1进行了调查。数值计算结果表明:等间距布孔时,MHO-1、第二级限流孔板(MHO-2)的孔中心距分别为28 mm、30 mm时,Δp1最大;MHO-1上孔中心距不变时,只改变等间距布孔的MHO-2上第1层孔中心距d2c1和第2层孔中心距d2c2,d2c1的变化比d2c2的变化对Δp1的影响更加明显;总体趋势是Δp1随着MHO-1、MHO-2上孔中心距的增大而减小。The aim is to study the influence of hole center distance on the pressure drop in the multi-stage restriction orifice(MHO).Firstly,the basic structural parameters of the multi-stage restriction orifice were calculated according to the design standard.Secondly,three-dimensional numerical fluid models were established on the basis of Fluent's Standard k-εturbulence model.The pressure drop(Δp1)of the first-stage restriction orifice(MHO-1),which has the greatest impact on the pressure drop was investigated.The numerical calculation results show that when the equispaced hole center distance of MHO-1 and the second-stage restriction orifice(MHO-2)is 28mm and 30mm respectively,theΔp1 is maximal.When the hole center distance of MHO-1 is certain and the equispaced hole center distance of the first and the second stage of MHO-2 are changed,d2c1 has greater impact onΔp1 than d2c2.The general trend is thatΔp1 decreases when the hole center distance increases.

关 键 词：限流孔板 孔中心距 数值计算 压降 

分 类 号：TH703[机械工程—仪器科学与技术]