Temperature Measurements in a Gas-Turbine-Combustor Sector Rig Using Swept-Wavelength Absorption Spectroscopy

Gas-temperature measurements in the combustion zone of a high-pressure gas-turbine-combustor sector rig were made with a Fourier-domain mode-locked laser using wavelength-agile absorption-spectroscopy techniques. These measurements are among the first employing broadband high-resolution absorption s...

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Bibliographic Details
Published in:Journal of propulsion and power 2009-07, Vol.25 (4), p.859-863
Main Authors: Kranendonk, Laura A, Caswell, Andrew W, Hagen, Christopher L, Neuroth, Craig T, Shouse, Dale T, Gord, James R, Sanders, Scott T
Format: Article
Language:English
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Summary:Gas-temperature measurements in the combustion zone of a high-pressure gas-turbine-combustor sector rig were made with a Fourier-domain mode-locked laser using wavelength-agile absorption-spectroscopy techniques. These measurements are among the first employing broadband high-resolution absorption spectroscopy in gas-turbine-engine environments. Compared with previous measurements in reciprocating engines and shock tubes, signal contamination from thermal emission was stronger in this combustor rig; methods for managing emission during experimental planning and postprocessing are discussed. H2OH2O spectra spanning 1330-1380 nm (which includes the ν1+ν3ν1+ν3 and 2ν12ν1 overtone bands) are presented along with a method for calculating gas temperatures from the spectra. The resulting temperatures are reported for a variety of combustor conditions. These tests show promise for simple gas-turbine sensors and potential for more detailed experiments involving tomographic reconstruction or multispecies concentration measurements. [PUBLISHER ABSTRACT]
ISSN:0748-4658
1533-3876
DOI:10.2514/1.41587