Title :
Study on the Inaccuracies of Air Velocity Measured by Pitots with Different Outer Diameter in a Air Duct
Author :
Hubiao, Wu ; Zhijun, Zou ; Chen, Huang ; Fei, Wang ; Hao, Li ; Zhongchao, Wang
Author_Institution :
Sch. of Environ. & Architeture, Univ. of Shanghai for Sci. & Technol., Shanghai, China
Abstract :
The inaccuracies for air velocity measured by Pitots with different diameter have been demonstrated by several experiments. It is defined that the measurement ranges of air velocity by Pitots with different outer diameter. Experiments show that: measurements by Pitot are larger than the true values. The measurement error of air velocity will be smaller if using the Pitot with a smaller outer diameter. The simplified function of correction coefficient and ratio of diameters is deduced by theoretical analysis. The maximum error of correction coefficients is 0.94%, which gained by the simplified function expression is compared with experimental data.
Keywords :
air; ducts; flow measurement; measurement errors; pipe flow; velocity measurement; air duct; air velocity measuremant inaccuracy; pitots; theoretical analysis; Equations; Fluid flow measurement; Force; Mathematical model; Measurement errors; Measurement uncertainty; Velocity measurement; Air velocity; Correction coefficient; Diameter; Measurement error; Pitot;
Conference_Titel :
Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM), 2011 International Conference on
Conference_Location :
Changsha
Print_ISBN :
978-1-61284-278-3
Electronic_ISBN :
978-0-7695-4350-5
DOI :
10.1109/CDCIEM.2011.179
