Mathematical model for determining initial section of heterogeneous flame and its adaptation

This paper describes a new mathematical model of aerodynamics and heat transfer at the initial section of heterogeneous flame continuum, which largely determine the fuel utilization efficiency of the boiler unit. It provides an analytical description of volatile organic emissions depending on the temperature. This temperature relates to heating coal-dust particles; at that, the ignition of air and volatile-matter mixture is considered both at the known temperature and at the known lower threshold of mixture explosion. These two approaches lead to the same results at determination of an initial flame section. Model reliability is ensured by the known experimental data obtained at determination of concentration limits of air and volatile-matter mixture ignition, period to mixture ignition and other data.