充分发展状态下管道流速分布研究

doi:10.3969/j.issn.1000-1158.2020.Z1.08

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Abstract In order to analyze the flow velocity distribution of the pipeline and its center symmetry, a plug-in ultrasonic flowmeter is used to measure the flow velocity of each area in the pipeline under the conditions of different installation angles and different flow velocity points. The experimental results show that the velocity of the pipeline decreases from the center to the edge, which is basically symmetrical distribution in the high velocity state and asymmetrical distribution in the low velocity state; the velocity of the area above the pipeline section is slightly larger than the area below, and the velocity of the horizontal centerline area is slightly larger than the vertical centerline area. It is shown that the velocity distribution of the pipeline is not strictly centrosymmetric under the fully developed condition, the change of the installation angle of the multi-channel ultrasonic flowmeter on the pipeline will cause the change of its measurement performance to a certain extent, especially in the low flow rate state.

Key words： metrology plug-in ultrasonic flowmeter pipeline velocity distribution centrosymmetry installation angle

PACS:

TB937

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	Articles by authors
	CAI Qin
	LIU Dun-li
	HU He-ming

Cite this article:

CAI Qin,LIU Dun-li,HU He-ming. Study on Velocity Distribution of Pipeline under Fully Developed Condition[J]. Acta Metrologica Sinica, 2020, 41(12A): 37-40.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2020.Z1.08 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2020/V41/I12A/37

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