涡街流量计梯形旋涡发生体的研究  

Study on Trapezoidal Bluff Body of Vortex Flowmeter

作　　者：胡岳[1] 张涛[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《化工自动化及仪表》2012年第5期580-584,共5页Control and Instruments in Chemical Industry

摘　　要：通过改变尾缘夹角角度、平行部分长度和取压位置,用CFD软件FLUENT对具有不同形状梯形旋涡发生体的DN100涡街流量计流场进行数值仿真研究。仿真结果表明:迎流面宽度为28mm的旋涡发生体,在尾缘夹角角度为45°,平行部分长度为4mm的情况下,能够产生最强的涡街信号;当尾缘夹角角度在40～70°之间时,信号峰值取压位置最靠近旋涡发生体,信号峰值取压位置在尾缘后部2倍迎流面宽度处。DN100 vortex flowmeter’s flow fields with various trapezoidal bluff bodies were tested.Cross-section shape with difference after body angle（ABA） and parallel part length（PPL） was simulated with FLUENT in CFD software,and simulation results show that the strongest vortex signal can be generated by the bluff body which boating of fixed upstream face width of 28mm,ABA of 45° and PPL of 4mm;the location of the pressure tap（LPT） with peak value becomes close to bluff body,i.e.the point two times of the upstream face width while ABA ranges from 40° to 70°.

关 键 词：涡街流量计 数值仿真 旋涡发生体 几何参数 

分 类 号：TH814[机械工程—仪器科学与技术]