Volume 65 Issue 12
Dec.  2021
Turn off MathJax
Article Contents
JIANG Hangcheng, LIN Mingxing, LI Hang, YANG Yang. A Method for Testing Influence of Flow Field Disturbance on Ultrasonic Gas Meters[J]. Metrology Science and Technology, 2021, 65(12): 40-44. doi: 10.12338/j.issn.2096-9015.2021.0138
Citation: JIANG Hangcheng, LIN Mingxing, LI Hang, YANG Yang. A Method for Testing Influence of Flow Field Disturbance on Ultrasonic Gas Meters[J]. Metrology Science and Technology, 2021, 65(12): 40-44. doi: 10.12338/j.issn.2096-9015.2021.0138

A Method for Testing Influence of Flow Field Disturbance on Ultrasonic Gas Meters

doi: 10.12338/j.issn.2096-9015.2021.0138
  • Available Online: 2021-11-01
  • Publish Date: 2021-12-01
  • According to the analysis of gas velocity in different sections of a pipeline, the velocity is related to the position of the section. Ultrasonic gas meters measure the cumulative volume by measuring the average velocity of the gas. Flow field disturbance affects the gas velocity distribution in the pipeline and the measurement accuracy. A gas meter is disturbed by two types of flow fields, namely velocity distribution distortion and vortex. This paper proposes a test method for two kinds of flow field disturbance, and focuses on the structure, installation and error algorithm of the disturbance generator. Taking the 1.5 grade G6 diaphragm gas meter as an example, a 0.5 stage sonic nozzle method gas flow standard device was used to test the influence of flow field disturbance under the flow rate of 10 m3 / h. The influence was less than 0.1%. Given the fact that diaphragm gas meters are not affected by flow field disturbance, the feasibility of the method and the accuracy of the algorithm were verified, providing an evaluation method for verifying the adaptability of ultrasonic gas meters to flow field disturbance. It can be used to obtain more complete and accurate test data of ultrasonic gas meters in design and optimization of flow channels, leading to better product quality. The test data of the G6 ultrasonic gas meter showed that it was easily affected by flow field disturbance. The change in the error caused by the disturbance on the inlet side at the flow rate of qmax was 0.30%, greater than the change of 0.11% on the outlet side, and the changes were related to the flow rate. This effect was insignificant at the flow rate of 0.2qmax. In the design of a product, the flow field should be optimized to reduce flow field disturbance.
  • loading
  • [1]
    牛立娜, 江航成, 陈红, 等. 超声波燃气表温度适应性测试研讨[J]. 计量技术, 2018(10): 23-26.
    [2]
    邓立三, 陈豫. 超声波燃气表计量特性试验分析[J]. 城市燃气, 2018(9): 17-24.
    [3]
    邓小远, 李霞, 谢代梁, 等. 超声波燃气表计量性能试验分析[J]. 中国计量大学学报, 2018, 29(3): 251-258. doi: 10.3969/j.issn.2096-2835.2018.03.004
    [4]
    张恩满, 江航成, 沈文新. 气体脉动流及测试装置技术研究[J]. 计量技术, 2017(6): 16-18.
    [5]
    江航成, 林明星, 钭伟明, 等. 瞬时流量法检测电子式燃气表计量性能[J]. 自动化仪表, 2020, 41(2): 20-23, 27.
    [6]
    王池, 王自和, 张宝珠, 等. 流量测量技术全书[M]. 北京: 化学工业出版社, 2012.
    [7]
    鲍敏. 影响气体超声波流量计计量精度的主要因素研究[D]. 杭州: 浙江大学, 2004.
    [8]
    陈红, 聂西利, 丁渊明. 超声波流量计整流器设计及验证[J]. 自动化仪表, 2018, 39(7): 91-93, 102.
    [9]
    翟义然, 赵勇, 刘义, 等. 工业超声波燃气表内部结构设计的气体流动仿真研究[J]. 中国测试, 2020, 46(2): 87-90.
    [10]
    郭心伟, 刘正刚. 气体超声波流量计改善流场适应性的研究[J]. 计量与测试技术, 2021, 48(2): 51-54.
    [11]
    孔珑. 工程流体力学[M]. 北京: 中国电力出版社, 2014.
    [12]
    陈炜刚. 气体超声波流量计非理想流场分析与补偿方法[D]. 杭州: 浙江大学, 2015.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Figures(4)  / Tables(2)

    Article Metrics

    Article views (336) PDF downloads(44) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return