Airspeed Calibration Services: Laser Doppler Anemometer Calibration and Its Uncertainty

Published: June 20, 2012

Author(s)

Iosif I. Shinder, Michael R. Moldover, J. M. Hall, Mike Duncan, Joe Keck

Abstract

The National Institute of Standards and Technology (NIST) and the Oak Ridge National Laboratory (ORNL) are improving their airspeed calibration services. Both laboratories use spinning disks to generate linear velocities that are traceable to NIST’s length and time standards. We compared their spinning disks using NIST’s laser Doppler anemometer (LDA) as a transfer standard. At 10 m/s, the disks differed by (0.11 ± 0.26) %, where the uncertainty is two standard deviations. We discuss the techniques used to calibrate LDAs with spinning disks and their uncertainties.
Proceedings Title: 8th International Symposium on Fluid Flow Measurement
Conference Dates: June 18-22, 2012
Conference Location: Colorado Springs, CO
Pub Type: Conferences

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Keywords

laser doppler calibration, spinning disk calibration, primary standard
Created June 20, 2012, Updated February 19, 2017