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| Research on Change of Calibration Coefficient of Ultrasonic Flowmeter with the Amount of Enterprise Pollution Source Flue Gas in Six Typical Flow Fields |
| FANG Yu-wen1,2,3,ZHANG Liang2,3,ZHAO Bu-hui1,WANG Chi2,3 |
1. School of Electrical and Information Engineering, Jiangsu University, Zhenjiang,Jiangsu 212013, China
2. National Institute of Metrology, Beijing 100029, China
3. Zhengzhou Institute of Metrology Advanced Technology, Zhengzhou, Henan 450001, China |
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Abstract Computational fluid dynamics is used to study the variation of calibration coefficient of ultrasonic flowmeter with different loads of the enterprise in six typical flow fields. The variation of relative standard deviation of calibration coefficient of ultrasonic flowmeter under different loads is analyzed under different path angle, pipe diameter, path layout, length of upstream straight pipe and pipe form. Through the experimental verification of the national stack flowrate standard facility, the results show that the relative standard deviation of calibration coefficient under different loads is less than 1%, and the stack ultrasonic flowmeter can be calibrated by single load calibration.
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Received: 28 December 2020
Published: 30 June 2022
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2022, Vol. 43 
