摘要
气体超声波流量计的测量精度由飞行时间的测量精度和流量计自身的流场适应性决定,流量计的流场适应性又由流量计的声道布置和整流器的性能决定。文章设计了一种内嵌于流量计的整流器,详细阐述了该整流器的结构、各模块的功能。介绍了整流器性能优化的理论依据、过程以及整流器性能优劣的判别准则。该整流器性能优化主要取决于起旋器的优化,文章给出了装有8片起旋器和装有10片起旋器的整流器在直管、单弯管下的性能参数对比,试验结果显示装有10片起旋器的整流器有着更好的流场适应性:重复性满足国标要求,直管示值误差与弯管示值误差的差值<0.3%。文章的创新点在于给出气体超声波流量计整流器设计和优化的理论依据和一整套流程,对于设计气体超声波流量计整流器的科研人员有借鉴意义。
The measurement accuracy of gas ultrasonic flow meters is determined by the measurement accuracy of flight time and the adaptability of the flow field of the flow meter itself,the flow field adaptability of the flow meter is determined by the sound channel arrangement of the flow meter and the performance of the rectifier.The article designs a rectifier embedded in a flow meter,the structure of the rectifier,the functions of each module.This article introduces the theoretical basis,process,and criteria for evaluating the performance of rectifiers.The performance optimization of the rectifier mainly depends on the optimization of the spinner,the article provides a comparison of performance parameters between rectifiers equipped with 8 gyrators and rectifiers equipped with 10 gyrators under straight and single bend conditions,the experimental results show that rectifiers equipped with 10 spinners have better flow field adaptability:repeatability meets national standard requirements,the difference between the indication error of straight pipes and the indication error of bent pipes is less than 0.3%.The innovation of the article lies in providing the theoretical basis and a complete process for the design and optimization of a gas ultrasonic flow meter rectifier,it can help the researchers who design the ultrasonic flow meter rectifiers.
作者
李季
章吉刚
汪志远
魏佳敏
LI Ji;ZHANG Jigang;WANG Zhiyuan;WEI Jiamin(Zhejiang Viewshine High-Tech Co.,Ltd.,Zhejiang Hangzhou 310013,China)
出处
《工业仪表与自动化装置》
2024年第1期38-41,56,共5页
Industrial Instrumentation & Automation
关键词
整流器
测量误差
流态畸变
气体超声波流量计
弯管
数值仿真
rectifier
measurement error
flow distortion
gas ultrasonic flow meter
elbow
numerical simulation
