Quantitative shearography in axisymmetric gas temperature measurements

Citation
Ba. Vanderwege et al., Quantitative shearography in axisymmetric gas temperature measurements, OPT LASER E, 31(1), 1999, pp. 21-39
Citations number
16
Categorie Soggetti
Optics & Acoustics
Journal title
OPTICS AND LASERS IN ENGINEERING
ISSN journal
01438166 → ACNP
Volume
31
Issue
1
Year of publication
1999
Pages
21 - 39
Database
ISI
SICI code
0143-8166(199901)31:1<21:QSIAGT>2.0.ZU;2-J
Abstract
This paper describes the use of shearing interferometry (shearography) for the quantitative measurement of gas temperatures in axisymmetric systems in which vibration and shock are substantial, and measurement time is limited . The setup and principle of operation of the interferometer are described, as well as Fourier-transform-based fringe pattern analysis, Abel transform , and sensitivity of the phase lead to temperature calculation. A helium je t and a Bunsen burner flame are shown as verification of the diagnostic. Th e accuracy of the measured temperature profile is shown to be limited by th e Abel transform and is critically dependent on the reference temperature u sed. (C) 1999 Elsevier Science Ltd. All rights reserved.