Abstract

A passive remote sensing technique for accurately monitoring the combustion efficiency (CE) of petrochemical flares is greatly desired. A Phase II DOE-funded SBIR lead by Spectral Sciences, Inc. is underway to develop such a method. This paper presents an overview of the current progress of the Air Force Institute of Technology's (AFIT) contribution to this effort. A Telops Hyper-Cam Mid-wave infrared (MWIR 1800-6667cm-1 or 1.5-5.5μm) imaging Fourier-transform spectrometer (IFTS) is used to examine a laminar calibration flame produced by a Hencken burner. Ethylene fuel (C2H4) was burned at four different equivalency ratios Φ=0.80, 0.91, 1.0 and 1.25. This work focuses on the qualitative spectrally-resolved visualization of a Hencken burner flame and the spatial distribution of combustion by-products. A simple radiative transfer model is then developed and fit to a single-pixel spectrum. The flame spectra were characterized by structured emissions from CO2, H2O and CO. For the Φ = 0.91 flame, the spectrally-estimated temperature was T = 2172±28K at a height 10mm above the burner, a favorable result compared to OH-PLIF measurements (T = 2226±112K) made on an identical flame. H2O and CO2 mole fractions across the flame at the same height of 10 mmwere measured to be 13.7±0.6% and 15.5±0.8%, respectively. © (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

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