- Author
-
Comeford, J. J.
- Title
- Spectral Distribution of Radiant Energy of a Gas-Fired Radiant Panel and Some Diffusion Flames.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Journal
-
Combustion and Flame,
Vol. 18,
125-132,
1972
- Report
-
NBS 10 224
April 15, 1970
33 p.
- Distribution
- AVAILABLE FROM: National Archives, Civilian Records, Room 2800, 8601 Adelphia Road, College Park, MD 20740-6001, Telephone: 301-713-7230
- Contract
- NBS-PROJECT-4216223
- Keywords
-
radiant energy; fire tests
- Abstract
- Measurements were made of the spectral distribution of energy from radiant sources employed in standard test methods of flammability. Radiant sources examined were a gas-fired radiant panel employed in ASTM Test E-162 and the electric heater employed in the Smoke Chamber Test. To afford a basis for comparison, the emission spectra of several diffusion flames in air were measured. The energy distribution of the flames occurred essentially in two narrow wave-length intervals corresponding to emission of carbon dioxide at 4.4 mu m and water at 2.7 mu m. Luminous diffusion flames containing large amounts of incandescent carbon, such as acetylene in air, show a blackbody background continuum with CO2 and H2O emission peaks superimposed on the continuum. The radiant test sources exhibited an energy distribution approximating that of a blackbody with atmospheric CO2 and H2O absorptions superimposed. The gas fired radiant panel in addition showed a significant emission peak at 4.4 mu m due to hot CO2.