闸阀扰流对外夹式超声流量计测量精度影响研究  

Study on Influence of Gate Valve Turbulence on Measuring Accuracy of Clamp-On Ultrasonic Flowmeter

作　　者：李晶晶 吴波 史慧超 陈云龙 黎光芳 孟晓炜 LI Jing-jing;WU Bo;SHI Hui-chao;CHEN Yun-long;LI Guang-fang;MENG Xiao-wei(Beijing Institute of Metrology,Beijing 100029,China;Guangzhou Institute of Energy Testing,Guangzhou 511447,China;College of Information Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China;Beijing Huakei Technology Co.,Ltd.,Beijing 100076,China;Beijing Tongzhou District Measurement and Testing Institute,Beijing 101100,China)

机构地区：[1]北京市计量检测科学研究院,北京100029 [2]广州能源检测研究院,广东广州511447 [3]北京化工大学信息科学与技术学院,北京100029 [4]北京华科仪科技股份有限公司,北京100076 [5]北京市通州区计量检测所,北京101100

出　　处：《测控技术》2022年第12期19-23,共5页Measurement & Control Technology

基　　金：国家重点研发计划项目(2019YFF02167001)。

摘　　要：受管路内不稳定流场的影响,外夹式超声流量计超声波传播声道上的流量计算模型改变,进而产生测量误差。采用计算流体动力学(CFD)仿真计算方法对50%闸阀开度时的管路流场进行了仿真分析,研究了闸阀前后不同位置处流场变化引起的流速变化情况,并在不同位置处提取多个声道的线平均速度进行比较,分析了选取不同声道时超声流量计的测量误差。最后,通过开展多声道超声流量计实测实验对CFD仿真计算结果进行了验证。Due to the influence of the unsteady flow field in the pipeline, the flow calculation model on the acoustic channel of the clamp-on ultrasonic flowmeter is changed and resulting in the measurement error.Computational Fluid Dymamics(CFD) simulation method is used to simulate and analyze the pipeline flow field when 50% gate valve is opened.The change of flow velocity caused by the change of flow field at different positions before and after the gate valve is studied.The average linear velocity of multiple sound channels is extracted at different positions for comparison, and the measurement error of ultrasonic flowmeter when different sound channels are selected is analyzed.Finally, the CFD simulation results are verified by the multi-channel ultrasonic flowmeter experiment.

关 键 词：外夹式超声流量计 CFD仿真计算 测量误差 

分 类 号：TH814[机械工程—仪器科学与技术]