Temperature distribution of magnesium flames

Abstract

Methods used in the past for calculating the radiation properties of flames with diffusing particles were employed in the investigation of oxygen/city gas flames containing magnesium oxide particles. In the first case oxygen was injected through the central nozzle, whereas in the second case the gas introduced through this nozzle was city gas. A common feature to all experiments was that magnesium has been supplied simultaneously through the central nozzle. Both types of flame differ with respect to their temperatures. These temperatures have been determined starting from measurements of both the colour temperature and luminance temperature. It was surprising to see that the temperature of the first type of flame showed a minimum at the centre of the flame. This minimum was not observed in the flame of the second type. The results are discussed, and information about the combustion process is offered.