CHARACTERIZATION OF LOW TURBULENCE WIND TUNNEL

Gilder Nader, Claudia dos Santos, Paulo J. S. Jabardo, Monica Cardoso, Nilson M. Taira, Marcos T. Pereira

Abstract

Wind tunnels with uniform velocity profiles and low turbulence are used to calibrate air velocity sensors such as anemometers and Pitot tubes among others. These wind velocity sensors are used in cases such as, for example, eolic turbines towers, meteorological stations, hospitals, etc. To make calibrations with high precision and accuracy it is necessary a wind tunnel with low turbulence (less than 0.4%) and uniform velocity profile in the test section. This study presents a characterization of the low turbulence wind tunnel of the Anemometry Laboratory of IPT (Institute for Technological Research), in which the calibrations are done in the discharge of the wind tunnel and the working range is from 2 m/s up to 40 m/s. A turbulence intensity less than 0.4% and a mean velocity variation of ± 0.2 % was obtained.

Keywords

wind tunnel, anemometry, turbulence

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PWC-2006-TC9-002u.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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