Acta Metrologica Sinica  2019, Vol. 40 Issue (1): 124-129    DOI: 10.3969/j.issn.1000-1158.2019.01.20
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Study on Internal Flow Field and Measurement Performance of Momentum Gas Flowmeter
LIU Zheng-gang,DU Guang-sheng,LIU Li-ping
School of Energy and Power Shandong University, Jinan, Shandong 250061, China
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Abstract  The numerical simulation and experiments are used to research internal flow characteristics of momentum gas flowmeter. The changing characteristic of drag coefficient for force-summing element is obtained, the influence of the structure and installation of force-summing element on the measurement performance are studied. The research results show the drag coefficient of momentum gas flowmeter changes greatly and the relationship between drag coefficient and Reynolds should be fitted, the rectangular force-summing element should be selected first because the fitting formula of drag coefficient for rectangular force-summing element has the least error. The maximum error between fitting formula and experimental data is 0.32%. Research results also show the installation error of force-summing element is no more than 0.32% and has little influence on the measurement accuracy and the momentum flowmeter is suitable for on-line installation.
Key wordsmetrology      momentum gas flowmeter      drag coefficient      numerical simulation      flow field     
Received: 29 September 2017      Published: 07 January 2019
PACS:  TB937  
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LIU Zheng-gang
DU Guang-sheng
LIU Li-ping
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LIU Zheng-gang,DU Guang-sheng,LIU Li-ping. Study on Internal Flow Field and Measurement Performance of Momentum Gas Flowmeter[J]. Acta Metrologica Sinica, 2019, 40(1): 124-129.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2019.01.20     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2019/V40/I1/124
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