Acta Metrologica Sinica  2022, Vol. 43 Issue (12): 1610-1615    DOI: 10.3969/j.issn.1000-1158.2022.12.14
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Influence of Hole-taking Method on Flow Measurement Results in Combination Total Pressure Tube
SAI Qing-yi,XIN Xu-chao,XU Hao-dong
School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
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Abstract  For the application of combined total pressure pipe in flow measurement of large pipeline with diameter more than 1m, numerical simulation was carried out on the combination total pressure tube with different hole extraction methods (isocyclic method, Chebyshev method) and different amount of total pressure holes (2 pairs, 3 pairs and 4 pairs). The results indicate that the relative error of the measured results of the combination total pressure tube with 4 pairs of holes arranged by the Chebyshev method is small, which has the best effect. The combination total pressure tube was made according to the best hole-taking method,and the flow measurement test was carried out. The measurement results were compared with those obtained by the transverse method of Pitot static pressure tube. The results show that the deviation of two flow measurement methods is within±0.5%.
Key wordsmetrology      flow measurement      combination total pressure tube      hole-taking method      numerical simulation     
Received: 06 September 2021      Published: 28 December 2022
PACS:  TB937  
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SAI Qing-yi
XIN Xu-chao
XU Hao-dong
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SAI Qing-yi,XIN Xu-chao,XU Hao-dong. Influence of Hole-taking Method on Flow Measurement Results in Combination Total Pressure Tube[J]. Acta Metrologica Sinica, 2022, 43(12): 1610-1615.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2022.12.14     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2022/V43/I12/1610
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