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Proceedings Paper

Remote sensing of temperature and concentration profiles of a gas jet by coupling infrared emission spectroscopy and LIDAR for characterization of aircraft engine exhaust
Author(s): J.-P. Offret; J. Lebedinsky; L. Navello; V. Pina; B. Serio; Y. Bailly; P. Hervé
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Paper Abstract

Temperature data play an important role in the combustion chamber since it determines both the efficiency and the rate of pollutants emission of engines. Air pollution problem concerns the emissions of gases such as CO, CO2, NO, NO2, SO2 and also aerosols, soot and volatile organic compounds. Flame combustion occurs in hostile environments where temperature and concentration profiles are often not easy to measure. In this study, a temperature and CO2 concentration profiles optical measurement method, suitable for combustion analysis, is discussed and presented. The proposed optical metrology method presents numerous advantages when compared to intrusive methods. The experimental setup comprises a passive radiative emission measurement method combined with an active laser-measurement method. The passive method is based on the use of gas emission spectroscopy. The experimental spectrometer device is coupled with an active method. The active method is used to investigate and correct complex flame profiles. This method similar to a LIDAR (Light Detection And Ranging) device is based on the measurement of Rayleigh scattering of a short laser pulse recorded using a high-speed streak camera. The whole experimental system of this new method is presented. Results obtained on a small-scale turbojet are shown and discussed in order to illustrate the potentials deliver by the sophisticated method. Both temperature and concentration profiles of the gas jet are presented and discussed.

Paper Details

Date Published: 22 June 2015
PDF: 13 pages
Proc. SPIE 9525, Optical Measurement Systems for Industrial Inspection IX, 95253Y (22 June 2015); doi: 10.1117/12.2184796
Show Author Affiliations
J.-P. Offret, Lab. Energétique Mécanique Electronmagnétisme, Univ. Paris Ouest Nanterre La Défense (France)
SARL Lasur (France)
J. Lebedinsky, Lab. Energétique Mécanique Electronmagnétisme, Univ. Paris Ouest Nanterre La Défense (France)
L. Navello, Lab. Energétique Mécanique Electronmagnétisme, Univ. Paris Ouest Nanterre La Défense (France)
V. Pina, Lab. Energétique Mécanique Electronmagnétisme, Univ. Paris Ouest Nanterre La Défense (France)
B. Serio, Lab. Energétique Mécanique Electronmagnétisme, Univ. Paris Ouest Nanterre La Défense (France)
Y. Bailly, Lab. FEMTO-ST, CNRS (France)
P. Hervé, Lab. Energétique Mécanique Electronmagnétisme, Univ. Paris Ouest Nanterre La Défense (France)


Published in SPIE Proceedings Vol. 9525:
Optical Measurement Systems for Industrial Inspection IX
Peter Lehmann; Wolfgang Osten; Armando Albertazzi Gonçalves, Editor(s)

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