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

Gregor Bobovnik (Avtor), Jože Kutin (Avtor)

Povzetek

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.

Ključne besede

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

Podatki

Jezik:	Angleški jezik
Leto izida:	2023
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FS - Fakulteta za strojništvo
UDK:	533
COBISS:	136179203
ISSN:	1873-412X
Št. ogledov:	2786
Št. prenosov:	890
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	analiza merilne negotovosti;hitrost zraka;laserski Dopplerejev anemometer;vetrovniki;zastojni učinek;
Vrsta dela (COBISS):	Članek v reviji
Konec prepovedi (OpenAIRE):	2024-11-26
Strani:	str. 1-9
Zvezek:	ǂVol. ǂ206
Čas izdaje:	Jan. 2023
DOI:	10.1016/j.measurement.2022.112228
ID:	17613150