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Proceedings Paper

Compact high-speed MWIR spectrometer applied to monitor CO2 exhaust dynamics from a turbojet engine
Author(s): R. Linares-Herrero; G. Vergara; R. Gutiérrez Álvarez; C. Fernández Montojo; L. J. Gómez; V. Villamayor; A. Baldasano Ramírez; M. T. Montojo; V. Archilla; A. Jiménez; D. Mercader; A. González; A. Entero
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Paper Abstract

Dfgfdg Due to international environmental regulations, aircraft turbojet manufacturers are required to analyze the gases exhausted during engine operation (CO, CO2, NOx, particles, unburned hydrocarbons (aka UHC), among others).Standard procedures, which involve sampling the gases from the exhaust plume and the analysis of the emissions, are usually complex and expensive, making a real need for techniques that allow a more frequent and reliable emissions measurements, and a desire to move from the traditional gas sampling-based methods to real time and non-intrusive gas exhaust analysis, usually spectroscopic. It is expected that the development of more precise and faster optical methods will provide better solutions in terms of performance/cost ratio. In this work the analysis of high-speed infrared emission spectroscopy measurements of plume exhaust are presented. The data was collected during the test trials of commercial engines carried out at Turbojet Testing Center-INTA. The results demonstrate the reliability of the technique for studying and monitoring the dynamics of the exhausted CO2 by the observation of the infrared emission of hot gases. A compact (no moving parts), high-speed, uncooled MWIR spectrometer was used for the data collection. This device is capable to register more than 5000 spectra per second in the infrared band ranging between 3.0 and 4.6 microns. Each spectrum is comprised by 128 spectral subbands with aband width of 60 nm. The spectrometer operated in a passive stand-off mode and the results from the measurements provided information of both the dynamics and the concentration of the CO2 during engine operation.

Paper Details

Date Published: 22 May 2013
PDF: 10 pages
Proc. SPIE 8705, Thermosense: Thermal Infrared Applications XXXV, 87050E (22 May 2013); doi: 10.1117/12.2015894
Show Author Affiliations
R. Linares-Herrero, New Infrared Technologies Ltd. (Spain)
G. Vergara, New Infrared Technologies Ltd. (Spain)
R. Gutiérrez Álvarez, New Infrared Technologies Ltd. (Spain)
C. Fernández Montojo, New Infrared Technologies Ltd. (Spain)
L. J. Gómez, New Infrared Technologies Ltd. (Spain)
V. Villamayor, New Infrared Technologies Ltd. (Spain)
A. Baldasano Ramírez, New Infrared Technologies Ltd. (Spain)
M. T. Montojo, New Infrared Technologies, S.L. (Spain)
V. Archilla, Instituto Nacional de Técnica Aeroespacial (Spain)
A. Jiménez, Instituto Nacional de Técnica Aeroespacial (Spain)
D. Mercader, Instituto Nacional de Técnica Aeroespacial (Spain)
A. González, ISDEFE (Spain)
A. Entero, ISDEFE (Spain)


Published in SPIE Proceedings Vol. 8705:
Thermosense: Thermal Infrared Applications XXXV
Gregory R. Stockton; Fred P. Colbert, Editor(s)

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