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Uncertainty analysis of the air velocity standard based on LDA and wind tunnel
ID Bobovnik, Gregor (Author), ID Kutin, Jože (Author)

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Abstract
This paper deals with uncertainty analysis an air velocity standard consisting of a wind tunnel and a laser Doppler anemometer (LDA) measuring system. The analysis is performed for air velocities between 0.3 m/s and 40 m/s, and a calibration procedure with the readings from the LDA and the device under test (DUT) taken simultaneously. The calculation of the reference air velocity includes a systematic correction of the velocity measured by the LDA to the position of the DUT. The study provides a complete and detailed methodology for estimating all major uncertainty contributions attributed to the LDA standard, position correction including velocity field uniformity, stability and uncorrected blockage effect. The contribution of the blockage effect was estimated for three different anemometers. For the Pitot static tube, the contribution of position correction predominates; however, for the other two larger anemometers, the contribution of the uncorrected blockage effect predominates at higher velocities.

Language:English
Keywords:uncertainty analysis, air velocity, laser Doppler anemometer, wind tunnels, blockage effect
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Author Accepted Manuscript
Publication date:01.01.2023
Year:2023
Number of pages:9 str.
Numbering:Vol. 206, art. 112228
PID:20.500.12556/RUL-143640 This link opens in a new window
UDC:533
ISSN on article:1873-412X
DOI:10.1016/j.measurement.2022.112228 This link opens in a new window
COBISS.SI-ID:136179203 This link opens in a new window
Publication date in RUL:05.01.2023
Views:2262
Downloads:87
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Record is a part of a journal

Title:Measurement
Publisher:Elsevier, International Measurement Confederation
ISSN:1873-412X
COBISS.SI-ID:23272709 This link opens in a new window

Secondary language

Language:Slovenian
Keywords:analiza merilne negotovosti, hitrost zraka, laserski Dopplerejev anemometer, vetrovniki, zastojni učinek

Projects

Funder:ARRS - Slovenian Research Agency
Project number:P2-0223
Name:Prenos toplote in snovi

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