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TECHNICAL PAPERS: Analytical and Experimental Techniques

Approximate Two-Color Emission Pyrometry

[+] Author and Article Information
S. Bhattacharjee, M. King, W. Cobb

Department of Mechanical Engineering, San Diego State University, San Diego, CA 92182

R. A. Altenkirch

Department of Mechanical Engineering and NSF Engineering Research Center for Computational Field Simulation, Mississippi State University, Mississippi State, MS 39762e-mail: altenkirch@research.msstate.edu

K. Wakai

Department of Mechanical Engineering, Gifu University, Japane-mail: wakai@cc.gifu-u.ac.jp

J. Heat Transfer 122(1), 15-20 (Aug 02, 1999) (6 pages) doi:10.1115/1.521431 History: Received February 15, 1999; Revised August 02, 1999
Copyright © 2000 by ASME
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References

Figures

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Schematic of combustion experiment showing: Top, side profile of flame spread experiment with including thermocouples, igniter, fuel bed, and flow characteristics; bottom, top view of flame spread experiment with IR camera and filter wheel arrangement with respect to the flame
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Simulated flame temperature contours in K (50 percent O2,Vg=10 cm/s)
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Simulated partial pressure of CO2 contours in atm (50 percent O2,Vg=10 cm/s)
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Simulated band intensity contours for Δλ=4.224–4.330 μm in W/(m2⋅Str) (50 percent O2,Vg=10 cm/s)
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Simulated band intensity contours for Δλ=2.56–3.02 μm in W/(m2⋅Str) (50 percent O2,Vg=10 cm/s)
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Simulated equivalent bandwidth ratio, A1.3/A2.8, for PMMA in 50 percent O2,Vg=10 cm/s,lp=2 cm
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Narrow-band equivalent bandwidth ratio, A2.8/A1.8, over wavelengths (Δλ1=2.474–2.674,Δλ2=1.86–2.16 μm) specified by Wakai et al. 6 for a range of pressure-pathlengths
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Wide-band (entire band) model predicted equivalent bandwidth ratio, A4.3/A2.8, for CO2 at various pressure-pathlengths from the maximum simulated pL to that approaching the thin limit
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Narrow-band model (4.224 μm<λ1<4.3 μm and 2.56 μm<λ1<3.02 μm) predicted equivalent bandwidth ratio, A4.3/A2.8, for CO2 and H2O at the maximum simulated pressure-pathlengths and the thin limit
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Narrow-band model predicted equivalent bandwidth ratio, A1/A2, for CO2 and H2O at the maximum simulated pressure-pathlengths for various bandwidth combinations; Δλ1=4.224–4.330,Δλ2=2.56–3.02,Δλ3=1.768–1.976
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Narrow-band simulated equivalent bandwidth ratio, A2.8/A1.8, for various pressure-pathlengths approaching the thin limit
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Narrow-band equivalent bandwidth ratio, A2.8/A1.8, for the maximum simulated pressure-pathlength with variations of the filter bandwidth wavelength limits
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Calculated flame temperature contours in K using a constant Ar of 24 (50 percent O2,Vg=10 cm/s,lp=2 cm)
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Percent error between calculated flame temperature contours using a constant Ar of 24 and the simulated temperature contours (50 percent O2,Vg=10 cm/s,lp=2 cm)

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