Experimental Research on the Expansibility Factor Calculation Model of V-Cone Flowmeters

Abstract:

This article aims to improve the accuracy of gas flow measurement of cone flowmeter and get a high-precision expansibility factor calculation model with wide applicable pressure range and different upstream side pressure. The experimental research was based on the DN50 and DN100 two sets of V-Cone flowmeter designed by Tianjin University. As the standard gas flow facility by means of critical flow venturi nozzles was insufficient supply capacity and poor pressure stability in positive pressure method, the experimental data obtained from standard gas flow facility by using negative pressure method was used to fit out the V-Cone flowmeter expansibility factor calculation model --TJU-2012 model. The model was tested with the experimental data obtained from the standard gas flow facility and compared with other four cone flowmeter expansibility factor calculation models, its maximum relative error was better than 0.9% and square averaged root error was better than 0.6%, both of them are the least.

• Periodical: Applied Mechanics and Materials (Volumes 220-223)
• Pages: 1686-1692
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.220-223.1686
• Online since: November 2012
• Authors: Tao Zhang, Long Bai, Yi Zhao
• Keywords: Expansibility Factor, Real Flow Experiment, Square Averaged Root Error, V-Cone Flowmeter

References

[1] Dahlstrom M J. V-Cone Meter: Gas Measurement for the Real Word. North Sea Flow Measurement Workshop, Scotland, Peebles: 1994.

[2] Peters R J W, Reader-Harris M, Stewart D G. An experimental derivation of an expansibility factor for the V-Cone and Wafer meter. North Sea Flow Measurement Workshop, Kristiansand, Norway, 2001.

[3] ISO 5167-1:2003 Measurement of Fluid Flow by Means of Pressure Differential Devices Inserted in Circular Cross-Section Conduits Running Full (Part 1): General Principles and Requirements. Switzerland: International Organization for Standardization, 2003.

DOI: 10.3403/01626280u

[4] ISO 5167-2:2003 Measurement of Fluid Flow by Means of Pressure Differential Devices Inserted in Circular Cross-Section Conduits Running Full (Part 2): Orifice Plates. Switzerland: International Organization for Standardization, 2003.

DOI: 10.3403/02774295u

[5] ISO 5167-4:2003 Measurement of Fluid Flow by Means of Pressure Differential Devices Inserted in Circular Cross-Section Conduits Running Full (Part 4): Venturi Tubes. Switzerland: International Organization for Standardization, 2003.

DOI: 10.3403/02774335u

[6] Ying Xu, Huifeng Yang, Tao Zhang. Acta Metrologica Sinica, Vol. 29(2008), pp.457-460. (In Chinese)

[7] Huifeng Yang. Experimental Research of Wafer Cone Flowmeter on Its Expansibility Factor and Wet Gas Flow Measurement. Tianjin: School of Electrical Engineering and Automation, Tianjin University, 2007. (In Chinese)

[8] Ying Xu, Lei Wang, Mingfang Cui. Journal of Tianjin University, Vol. 42(2009), pp.945-951. (In Chinese)