Blockage Effects in the Calibration of Anemometer in a Wind Tunnel

Wu Jian, Chua Hock Ann

Abstract

Anemometers are commonly calibrated using wind tunnel systems. Due to the finite volume of the test section of wind tunnels, measurement results obtained in the wind tunnels often do not resemble those obtained under the condition of infinitely spaced boundaries as the blockage effects of anemometers cannot be neglected. This paper describes an experiment carried out to analyse the blockage effects of anemometers in a wind tunnel having effective test size of ∅ 180 mm x 300 mm which covers the velocity range of 0.1 to 60 m/s.

Keywords

wind tunnel, blockage effects, wind profiles, measurement uncertainty

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DOI

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IMEKO TC

TC9 - Flow Measurement

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