Effects of radiative and conductive transfer on thermal ignition

✍ Scribed by T.F. Smith; K.-H. Byun; L.-D. Chen

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 546 KB
• Volume: 73
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(88)90053-3

✦ Synopsis

The purpose of this study is to examine the thermal ignition phenomenon when the interaction of conductive and radiative heat transfer for a plane layer medium with an Arrhenius heat generation is considered. The medium contains absorbing and emitting gases, soot, and particles where scattering is included for the particles. The medium is enclosed between isothermal and reflecting walls. Numerical results are reported for the heat release that causes a sudden increase in the medium temperature. The influence of medium composition, particle scattering, and wall emittance on the heat release for thermal ignition is reported. For the values of the parameters examined, the results indicate that when absorbing gases, soot, and particle radiation effects are taken into account, the heat release may be two orders of magnitude higher than that when only conduction is considered.