ID#: 217
Abstract Title: Adiabatic Waves of Gasless Combustion: 3D Simulation
Session Title: Gasless and Dust Containing Flames
Session Date: 7/30/01
Session Start Time: 3:40 PM
Contributing Author: Ivleva, T.P.
Organization: Institute of Structural Macrokinetics and Materials Science
Country: Russia
Authors: T.P. Ivleva, A.G. Merzhanov
Short Abstract: We consider a three-dimensional system of reaction-diffusion equations describing the propagation of spinning combustion waves along a thermally insulated cylindrical sample of solid fuel. We consider the heat release and heat transfer only. The given mathematical model of the process was studied numerically by using the method of finite differences. The applied spatial grid was non-uniform with an unfixed number of nods, and it was adapted to a solution. The mechanism of hot spots moving was described and analyzed for many found modes. The data presented in this paper are associated with established modes only. There are two kinds of modes: the modes with invariable front structure (at small sample radius) and the non-stationary modes with multiple transformations of the front during a period. In the latter case, blinking of hot spots is observed on the sample surface. Flickering of hot spots can be both synchronous and by-turn. The hot spots can move both in a right-side and left-side way. It was found that for the spinning combustion the average velocity of the front propagation was approximately identical to the theoretical velocity of stationary combustion wave propagating through condensed phase under adiabatic conditions. The mean front velocity slightly decreases with increase in the sample radius. Also the non-uniqueness of combustion modes was found. The areas of existence for these modes have been determined.