Experimental Study of Flow Measurement Characteristics of Venturi Tube under Pulsating Flow Conditions

ZHANG Xuerong; LUO Haotian; LIU Li; GU Hanyang

doi:10.3969/j.issn.1000-1158.2026.04.07

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Acta Metrologica Sinica ›› 2026, Vol. 47 ›› Issue (4) : 523-530. DOI: 10.3969/j.issn.1000-1158.2026.04.07

Experimental Study of Flow Measurement Characteristics of Venturi Tube under Pulsating Flow Conditions

ZHANG Xuerong ¹^,² ,
LUO Haotian ¹^,² ,
LIU Li ¹^,² ,
GU Hanyang ¹^,²

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Abstract

In the operation of many industrial equipment such as rotating equipment， reciprocating equipment and regulating valves， the generation of pulsating flow is often caused， and the unstable flow of fluid has a great influence on the accuracy of flow measurement. By building an experimental circuit for pulsating flow measurement， using Venturi and differential pressure sensor to measure flow and differential pressure under different working conditions， the measurement characteristics of Venturi under pulsating flow are studied， the effects of pulsating flow， lead pipe length and pulsation frequency on the accuracy of differential pressure measurement are explored， and the feasibility of high-frequency pressure sensor to measure the pulsating differential pressure is comparatively analyzed. The results show that the increase of pulsating flow will cause the amplitude of the pulsating differential pressure to increase， the length of the pilot tube and the pulsation frequency have a significant effect on the measurement results of the pulsating differential pressure， and the shorter pilot tube and lower pulsation frequency can help to improve the accuracy of the measurement of the pulsating differential pressure， the high-frequency pressure sensor has the reliability of the measurement under the conditions of pulsating flow， and it can effectively eliminate the error caused by the pilot tube. The results of the study provide a reference for the optimization of fluid measurements under pulsating flow conditions.

Key words

flow measurement / pulsating flow / Venturi tube / pulsating differential pressure / differential pressure sensor / length of pressure tap tube / pulsation frequency

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ZHANG Xuerong , LUO Haotian , LIU Li , et al. Experimental Study of Flow Measurement Characteristics of Venturi Tube under Pulsating Flow Conditions[J]. Acta Metrologica Sinica. 2026, 47(4): 523-530 https://doi.org/10.3969/j.issn.1000-1158.2026.04.07

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