双锥形流量计仿真与数学模型研究  

Research on Mathematical Model and Simulation of Double-cone Flowmeter

作　　者：刘雅杰 陈汉松 冯良锋 胡泽枫 张学习[2] LIU Yajie;CHEN Hansong;FENG Liangfeng;HU Zefeng;ZHANG Xuexi(Guangzhou Energy Research Institute,Guangzhou Guangdong 510000,China;College of Automation,Guangdong University of Technology,Guangzhou Guangdong 512000,China)

机构地区：[1]广州能源检测研究院,广东广州510000 [2]广东工业大学自动化学院,广东广州512000

出　　处：《机床与液压》2018年第17期96-99,共4页Machine Tool & Hydraulics

基　　金：国家质量监督检验检疫总局科技计划项目(2016QK032)

摘　　要：双锥流量计目前没有统一的国家标准,研究其前锥角、后锥角、槽道长度、等效直径比4个几何参数,与流出系数、压力损失等性能评价指标的影响规律,有助于双锥流量计的性能评估与校准。采用控制变量实验法,设计了4组FLUENT流体仿真实验,对各几何参数对性能指标的影响进行研究。实验结果表明:前后锥角对流出系数影响不大,锥角45°的相对压力损失最小;槽道长度对流出系数大小影响最大,但不影响流出系数的线性度,对相对压力损失也有影响;等效直径比越大,流出系数越大,相对压力损失越小,且具有线性关系。以此为依据,确定节流件优化参数为前后锥角45°、槽道长度取D/2。最后建立双锥流量计在优化参数下,等效直径比与流出系数、压力损失的数学模型。There are no uniform national standards in the double?cone flowmeter.Research of the influence of the four geometric parameters,such as the front cone angle,the rear cone angle,the channel length,and the equivalent diameter ratio,on the performance index of the discharge coefficient and the pressure loss are helpful to its performance evaluation and calibration.Four groups of FLUENT fluid simulation experiments were designed by using the control variable experiment method,and the influence of each geometric parameter on the performance index was researched.The experimental results show that the influence of the front and rear angle has little effect on the outflow coefficient,and the relative pressure loss is the smallest when the cone angle is 45°.The channel length has the greatest influence on the outflow coefficient,but does not affect the linearity of the outflow coefficient,and also has influence on relative pressure lose.The larger the equivalent diameter ratio,the greater is the outflow coefficient,the smaller is the relative pressure loss,and with the linear relationship.Based on this,determine the flowmeter optimization parameters for the front and rear cone angle 45°,channel length to take D/2.Finally,a mathematical model of the equivalent diameter ratio and the discharge coefficient and the pressure loss is established under the optimized parameters of the double cone-flowmeter.

关 键 词：双锥流量计 等效直径比 锥角 槽道 压力损失 流出系数 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]