چكيده به لاتين
Abstract
The concept of metal dust combustion is really prominent in engineering science. Metal particles, have broad usage in different areas, such as aerospace,fuel and energy, propellor systems and also fire safety in the mines and silos. In fact broad usage of metal dust combustion especially aluminium particle along the safety issue of the industries that deal with metal particles, appears the importance of working and researchin in this field more and more. On the other hand, in this field heat loss from the combustion chamber in most of the cases including combustion devices play an important role in burning velocity, flame extinction and flamability limit.
In this study, the metal dust, discrete combustion has been studied and the parameters of quenching distance and heat loss has been investigated. In the previous studies the applied model for the heat loss temperature profile was considered in first degree type. After observing and studying the flame behavior of the metal and organic particles the second degree type was assumed. By more precised investigation the dust combustion in the microscopic scale it was concluded that the random discrete model is a more realistic model. In this thesis the obtained results have been compared with the previous ones that show a good precison.
Keywords: aluminium dust combustion, discrete and random combustion, quenching distance,flamability limit,burning velocity
