Translator Disclaimer
29 September 1995 Infrared tunable diode laser measurements of nitrogen oxide species in an aircraft engine exhaust
Author Affiliations +
Abstract
Recent requirements for better characterization of the trace species in the exhausts of advanced aircraft engines have resulted in the development, under NASA sponsorship, of a tunable infrared diode laser system capable of making both in situ and extractive sampling measurements. In this paper, we describe the first application of this instrument to nonintrusive, cross-flow measurements in the exhaust of an aircraft engine operating in an altitude test cell. Simultaneous absorption measurements of NO, NO2 and H2O using the combined beams from two lasers were made at a variety of engine and flight conditions. The utility of measuring concentrations of major species such as H2O to convert line of sight observations of trace species into mass fluxes is discussed, as are uncertainties in the measurement resulting from fluctuations in the absorption spectra and from conversion from integrated column density to concentration profiles.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joda C. Wormhoudt, Mark S. Zahniser, David D. Nelson Jr., J. Barry McManus, R. C. Miake-Lye, and Charles E. Kolb "Infrared tunable diode laser measurements of nitrogen oxide species in an aircraft engine exhaust", Proc. SPIE 2546, Optical Techniques in Fluid, Thermal, and Combustion Flow, (29 September 1995); https://doi.org/10.1117/12.221559
PROCEEDINGS
10 PAGES


SHARE
Advertisement
Advertisement
Back to Top