孔中心距对限流孔板压降的影响
王天豪,吉华,李倩,段宗幸,吴孙珂
(四川大学 化学工程学院,四川 成都 610065)
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∆p1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,∆p1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∆p1的影响更加明显;总体趋势是∆p1随着MHO-1、MHO-2上孔中心距的增大而减小。
关键词:限流孔板;孔中心距;数值计算;压降
中图分类号:TH703 文献标志码:A doi:10.3969/j.issn.1006-0316.2020.02.010
文章编号:1006-0316 (2020) 02-0059-05
Influence of Hole Center Distance on Pressure Drop of Restriction Orifice
WANG Tianhao,JI Hua,LI Qian,DUAN Zongxing,WU Sunke 
( School of Chemical Engineering, Sichuan University, Chengdu 610065, China )
Abstract: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-ε turbulence model. The pressure drop (∆p1) 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, the ∆p1 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 on ∆p1 than d2c2. The general trend is that ∆p1 decreases when the hole center distance increases.
Key words:restriction orifice;hole center distance;numerical calculation;pressure drop
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收稿日期:2019-08-12
基金项目: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)
作者简介:王天豪(1995-),男,河北邯郸人,硕士研究生,主要研究方向为流体机械;吉华(1972-),男,四川武胜人,博士,副教授,主要研究方向为流体机械。
 

 

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