In the present work, line-of-sight spectral radiation intensities (Iλ) were measured in a 7.1 cm ethylene (C2H4) buoyant diffusion flame, designed to mimic pool fires. Various time series statistics were calculated using the radiation data. Both soot and gaseous species had significant radiation emissions, emphasizing the need for spectrally-resolved radiation measurements. Significant fluctuations were observed in the radiation intensities from the fire, especially at higher elevations and near the flame edges. In addition, root-mean-square (rms) and probability density functions (PDF) of Iλ indicated higher fluctuations in soot compared to gaseous species. Autocorrelations of Iλ showed periodic oscillations due to the puffing phenomenon typically seen in pool fires. The observed oscillation frequencies ranged from 7.47 to 7.86 Hz and are in excellent agreement with empirical correlations based on past data. Characteristic frequencies of these oscillations were also reflected in the power spectral densities (PSD) of Iλ. Based on the measured autocorrelations of Iλ, it was observed that the integral time scales decrease with increasing height above the burner exit, which is expected since mean velocities increase with height due to combustion-induced buoyancy in pool fires and buoyant flames.
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ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
August 10–14, 2008
Jacksonville, Florida, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4849-4
PROCEEDINGS PAPER
Spectral Radiation Properties of a Turbulent Ethylene Pool Fire Available to Purchase
Kaushik Biswas,
Kaushik Biswas
Purdue University, West Lafayette, IN
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Yuan Zheng,
Yuan Zheng
Purdue University, West Lafayette, IN
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Jay Gore
Jay Gore
Purdue University, West Lafayette, IN
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Kaushik Biswas
Purdue University, West Lafayette, IN
Yuan Zheng
Purdue University, West Lafayette, IN
Jay Gore
Purdue University, West Lafayette, IN
Paper No:
HT2008-56310, pp. 199-206; 8 pages
Published Online:
July 7, 2009
Citation
Biswas, K, Zheng, Y, & Gore, J. "Spectral Radiation Properties of a Turbulent Ethylene Pool Fire." Proceedings of the ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. Heat Transfer: Volume 3. Jacksonville, Florida, USA. August 10–14, 2008. pp. 199-206. ASME. https://doi.org/10.1115/HT2008-56310
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