流态对超声流量计的测量精度影响及修正方法探讨  

Discussion of Flow State on the Measurement Accuracy Influence and Correction Methods of Ultrasonic Flow Meters

作　　者：陈辉 刘国兴 吴保丰 赵晓盼 刘婷婷 CHEN Hui;LIU Guoxing;WU Baofeng;ZHAO Xiaopan;LIU Tingting(Hebei Ultrasonic Measuring Instrument Technology Innovation Center,Huizhong Instrument Co.,Ltd.,Tangshan 063020,China)

机构地区：[1]汇中仪表股份有限公司河北省超声测试计量仪器技术创新中心,河北唐山063020

出　　处：《仪表技术》2024年第2期60-63,共4页Instrumentation Technology

摘　　要：通过构建理论流场,分析多声路流量计不同弦高上线流速与平均流速的关系系数k,获取其与雷诺数的变化规律;结合实验验证,进一步对基于Gauss-Jacobi积分法的流量计的权重进行流态修正,将关系系数k作用到各声路的权重上,使声路权重随流速大小变化,以适应流速或高温高压引起的流态变化。实验数据表明,在管内流体呈紊流状态下,该修正方法可以确保流量计的测量精度不受流体流态变化的影响。By constructing a theoretical flow field,this paper analyzes the relationship coefficient k between the top flow rate and the average flow rate of the multi-channel flowmeter with different chord heights,and obtains the change rule between the coefficient k and the Reynolds number.Combined with experimental verification,the flow state of the flowmeter weight based on the Gauss-Jacobi integral method is further modified,and the relationship coefficient k is applied to the weight of each sound path.The weight of the sound right of way is changed with the velocity to adapt to the flow pattern change caused by the velocity or high temperature and high pressure.The experimental data shows that this correction method can ensure that the measurement accuracy of the flowmeter is not affected by changes in fluid flow state when the fluid in the pipe is in a turbulent state.

关 键 词：高温 高压 交叉四声道 权重修正 Gauss-Jacobi积分 

分 类 号：TH814[机械工程—仪器科学与技术]