An unsteady flame propagation through a system of air-fuel vapor-fuel d개plets was modeled in a one dimensional closed combustor.
The governing equations have been numerically solved using an iterative implicit method with a quasi-linearization. A velocity lag between the gas and the droplets was permitted, and the transient heat transfer to the droplets was taken into account. The droplet temperature was evaluated by using a conduction limited model, which implied that the droplet temperature is spatially uniform, but it changes with time. Results have been obtained for a heavy oil, n-decane. The characteristics of the spray flame propagation such as local variations of equivalence ratio, maximum flame temperature, chemical reaction rate etc. were quantitatively and qualitatively explained.
