Uncertainty analysis of the air velocity standard based on LDA and wind tunnel

Gregor Bobovnik (Author), Jože Kutin (Author)

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.

Keywords

analiza merilne negotovosti;hitrost zraka;laserski Dopplerejev anemometer;vetrovniki;zastojni učinek;uncertainty analysis;air velocity;laser Doppler anemometer;wind tunnels;blockage effect;

Data

Language:	English
Year of publishing:	2023
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	533
COBISS:	136179203
ISSN:	1873-412X
Views:	2786
Downloads:	890
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	analiza merilne negotovosti;hitrost zraka;laserski Dopplerejev anemometer;vetrovniki;zastojni učinek;
Type (COBISS):	Article
Embargo end date (OpenAIRE):	2024-11-26
Pages:	str. 1-9
Issue:	ǂVol. ǂ206
Chronology:	Jan. 2023
DOI:	10.1016/j.measurement.2022.112228
ID:	17613150