两种湍流模型在多孔孔板流场数值计算中的比较  

Comparison of Two Turbulence Models in Flow Field Numerical Calculation of Multi-orifice Flow Meter

作　　者：赵珊珊[1] 张涛[1] 于洪仕[1,2] 郑丹丹[1] 

机构地区：[1]天津大学电气与自动化工程学院 [2]辽宁工程技术大学电子与信息工程学院

出　　处：《化工机械》2013年第6期783-787,828,共6页Chemical Engineering & Machinery

摘　　要：根据多孔孔板流量计的流场特点选择SST四方程和SST k-ω湍流模型对多孔孔板进行仿真计算,将流出系数计算结果与实流实验结果进行比较。结果表明:相对于SST k-ω湍流模型来说,SST四方程湍流模型更适合计算多孔孔板流量计的流场,而且雷诺数较小时计算精度较高。另外,多孔孔板流量计的环隙比接近1时流出系数线性度最好,达0.8%;环隙比远小于1时流出系数线性度最差,为3.6%。Basing on the flow field characteristics of multi-orifice flow meter, both SST （shear-stress trans- port） 4-equation and SST k-ω turbulence model were selected to simulate multi-orifice flow meter. Having el- flux coefficient＇ s calculation results compared with experimental results shows that, with respect to SST turbu- lence model, the SST 4-equation turbulence model is more suitable to calculate the flow field of multi-orifice flow meter, and the calculation precision is higher in the case of low Reynolds number; the linearity of the ef- flux coefficient C becomes best and reaches 0.8% when k closes to 1, and oppositely, the linearity of the ef- flux coefficient C becomes worst and reaches 3.6% when k gets less than 1.

关 键 词：多孔孔板流量计 流出系数 湍流模型 仿真 

分 类 号：TH814[机械工程—仪器科学与技术]