The onset of luminosity in propane/air flames

✍ Scribed by I. Murray; G.D. Sergeant

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 608 KB
• Volume: 51
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(72)90002-6

✦ Synopsis

The onset of luminosity in propane/air flames, enclosed in a furnace operated at two temperature levels, has been examined at four stoichiometric values by determining carbon dioxide, carbon monoxide, oxygen and hydrocarbon concentrations together with temperature, total radiation, and radiation in the 4-3 to 45 pm wavelength region at distances along the flames. The data obtained have been processed to give values of total and spectral flame emissivity. The results show that luminous radiation is spectral in nature; the intermediate carbon-forming compounds emit more radiation than the products that are formed. A significant proportion, 10 to 40%, of the radiation is emitted in the 4.3 to 4.5 pm waveband. The concentrations of carbon monoxide, carbon dioxide and oxygen remain essentially constant, and there appears to be no set temperature for the onset of luminosity,