Effect of the insertion depth on calibration results of vane anemometers

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F23%3AN0000055" target="_blank" >RIV/00177016:_____/23:N0000055 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0263224123011946" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0263224123011946</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.measurement.2023.113630" target="_blank" >10.1016/j.measurement.2023.113630</a>

Result language
angličtina
Original language name
Effect of the insertion depth on calibration results of vane anemometers
Original language description
In this paper we show that velocity indication of vane anemometers with a propeller placed at the end of a mounting rod installed perpendicularly to air flow can vary by several percent (up to 9% in our tests) if the length of the mounting rod exposed to flow (insertion depth) is changed. Four vane anemometers of different dimensions were tested for velocities (2-20) m/s and for the insertion depths (7.5-37.5) cm. Interlaboratory comparison was conducted showing how the effect influences the calibration results in five different wind tunnels with test section diameters/widths from 25.5 cm to 100 cm. Important conclusions were drawn for air speed calibration laboratories whose uncertainties are usually an order of magnitude smaller than the variations of the measurement error observed for some of the anemometers. Also, it was shown that the effect can be nearly eliminated by changing the cross-sectional profile of the mounting rod from circle to an airfoil.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20302 - Applied mechanics

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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