摘要
针对生活和工业上广泛使用的小口径气体超声波流量计,探究温度传感器对超声波流量计测量精度的影响,分析了温度传感器不同凸出长度对管道内部的流速分布的影响。对于DN50口径的双声道气体流量计,使用计算流体力学(CFD)的方法进行仿真,分析在不同流速下,温度传感器插入管道不同长度引起的流场剖面变化,及其对声道流速分布的影响,并进行了不同凸出长度的温度测量和流量测量实验。实验结果如下:当温度传感器凸出长度为4 mm时,对气体超声波流量计的测量影响最小,结合实验数据得出温度传感器的最佳凸出长度是6 mm。仿真和实验分析表明,凸出长度是影响超声波流量计测量精度的重要因素之一。
Aiming at the small-diameter gas ultrasonic flowmeter widely used in life and industry,the influence of temperature sensor on the measurement accuracy of ultrasonic flowmeter is explored,and the influence of different protruding length of temperature sensor on the flow velocity distribution in the pipeline is analyzed.For the DN50 dual channel gas flowmeter,the computational fluid dynamics(CFD)method is used to simulate,which analyzes the flow field profile changes caused by the different length of the temperature sensor inserted into the pipe under different flow velocity,and its influence on the velocity distribution of the sound channel.The temperature measurement and flow measurement experiments are carried out with different protruding length.The experimental results are as follows:when the protrusion length of the temperature sensor is 4 mm,it has the least influence on the measurement of gas ultrasonic flowmeter.Combined with the experimental data,the optimal protrusion length of the temperature sensor is 6 mm.Simulation and experimental analysis show that the protruding length is one of the important factors affecting the measurement accuracy of ultrasonic flowmeter.
作者
张岩
李跃忠
胡开明
ZHANG Yan;LI Yuezhong;HU Kaiming(College of Mechanical and Electronics Engineering,East China University of Technology,Nanchang 330013,China;Jiangxi Province Engineering Research Center of New Energy Technology and Equipment,Nanchang 330013,China)
出处
《仪表技术》
2022年第3期60-65,共6页
Instrumentation Technology
基金
国家自然科学基金(61663001)
江西省新能源工艺及设备工程技术研究中心开放基金(JXNE2018-08)。
