Investigation of temperature and gas concentration distributions in hot exhausts (airplanes and burners) by scanning imaging FTIR spectrometry

The Scanning Infrared Gas Imaging System of High Resolution (SIGIS-HR) was used to perform non-intrusive measurements of a Boeing 737 and a diesel powered burned (used as a hot gas producer). During the measurements it was observed that the selection of the optimal measurement positions into the plume, visualised by an infrared image from a real-time infrared camera in which the emission intensity of different field of view (FOV) positions into the plume are plotted in false colours, is possible very precisely. This enhanced considerably the probability of detection of infrared radiation emitted by a hot gas plume (e. g. from an in-service aircraft at the ground) for the objective to determine composition and temperature of the exhausts. Using this improved localization of the optimum measurement position into the hot exhaust plume the temperature and the concentrations of CO and NO were calculated. Additionally, the spatial distribution of gas temperature and concentrations of CO, CO2 and NO into the exhaust plume were determined.

[1]  Roger Burrows,et al.  Nonintrusive optical measurements of aircraft engine exhaust emissions and comparison with standard intrusive techniques. , 2000, Applied optics.

[2]  Bernhard Lechner,et al.  Comparison of remote sensing techniques for measurements of aircraft emissions indices at airports , 2004, SPIE Remote Sensing.

[3]  Edgar Flores-Jardines,et al.  Remote measurement of the plume shape of aircraft exhausts at airports by passive FTIR spectrometry , 2004, SPIE Remote Sensing.

[4]  V. M. Devi,et al.  THE HITRAN MOLECULAR DATABASE: EDITIONS OF 1991 AND 1992 , 1992 .

[5]  Y. Yung,et al.  Atmospheric Radiation: Theoretical Basis , 1989 .

[6]  Klaus Schäfer,et al.  Determination of major combustion products in aircraft exhausts by FTIR emission spectroscopy , 1998 .

[7]  K. Schäfer,et al.  Multipass open-path Fourier-transform infrared measurements for nonintrusive monitoring of gas turbine exhaust composition. , 2005, Applied optics.

[8]  Bernhard Lechner,et al.  AIRCRAFT EMISSION MEASUREMENTS BY REMOTE SENSING METHODOLOGIES AT AIRPORTS , 2003 .

[9]  Peter Rusch,et al.  SIGIS HR: a system for measurement of aircraft exhaust gas under normal operating conditions of an airport , 2005, SPIE Remote Sensing.

[10]  K. Schäfer,et al.  Analysis of aircraft exhausts with Fourier-transform infrared emission spectroscopy. , 1997, Applied optics.

[11]  J. Gore,et al.  Estimating scalars from spectral radiation measurements in a homogeneous hot gas layer , 2004 .

[12]  H Mosebach,et al.  Mobile Fourier-transform infrared spectroscopy monitoring of air pollution. , 1994, Applied optics.

[13]  Laurence S. Rothman,et al.  HITRAN HAWKS and HITEMP: high-temperature molecular database , 1995, Defense, Security, and Sensing.

[14]  Joerg Heland,et al.  Remote sensing and gas analysis of aircraft exhausts using FTIR emission spectroscopy , 1995, Other Conferences.