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Proceedings Paper

FTIR airborne measurement of aircraft jet engine exhaust gas emissions under cruise conditions
Author(s): Volker Tank; Peter Haschberger; Erwin Lindermeir; K. H. Matthern
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Paper Abstract

A flight qualified Fourier transform infrared spectrometer has been built by applying the MIROR principle (Michelson interferometer with rotating retroreflector) where an eccentrically rotating retroreflector generates optical path differences. The unique optical design is especially suiting the rough environment of airborne missions. The purely optical and passive method in no way influences the gases as sample collecting procedures are likely to do. It is able to deliver true space/time resolved spectra of several species in the exhaust plume simultaneously. First measurements aboard a civil jet aircraft have been performed, successfully collecting spectra of the infrared radiation emitted by the hot exhaust gases just behind the engine's nozzle. The spectra were radiometrically calibrated and column densities of trace gases in the plume and in the for- and background as well as gas temperatures were calculated applying inversion algorithms. From these then emission indices (mass pollutant per mass kerosene) of the engine for specific trace gases were determined.

Paper Details

Date Published: 20 September 1995
PDF: 9 pages
Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); doi: 10.1117/12.221008
Show Author Affiliations
Volker Tank, DLR (Germany)
Peter Haschberger, DLR (Germany)
Erwin Lindermeir, DLR (Germany)
K. H. Matthern, DLR (Germany)

Published in SPIE Proceedings Vol. 2506:
Air Pollution and Visibility Measurements
Peter Fabian; Volker Klein; Maurus Tacke; Konradin Weber; Christian Werner, Editor(s)

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