Theory of spin and spiral gasless combustion
- Russian Academy of Sciences, Moscow (Russian Federation). Inst. of Chemical Physics
Experimental investigations of gasless condensed-system combustion have resulted in the discovery of new interesting regimes of reaction zone propagation. Among them are spin and spiral modes. The former is combustion of a cylindrical sample when a reaction hot spot moves in helical fashion along its surface. The latter represents combustion with a spiral trajectory on a planar sample. From a theoretical point of view, both the spin and spiral combustion are very strongly nonlinear phenomena. An approximate analytical method is formulated for the spin and spiral combustion modes in this paper. Because the surface regimes are considered, one can investigate only a two-dimensional problem, which can be reduced to a one-dimensional one by averaging the temperature over the spin step. The reaction zone is assumed to be infinitely thin in one dimension and of finite length in the other. Finally, it is supposed that two velocity components of the hot spot differ greatly. The conditions for existence of the spin and spiral regimes are obtained. They depend on the cylinder diameter or spiral radius and heat losses. Explicit analytical expressions for various quantities of interest, including the propagation spin and spiral velocity components and the temperature profile, are given. It is possible in the framework of the theory to explain multicenter spin and spiral regimes. Wherever possible, conclusions of the theory are compared with the experimental data.
- OSTI ID:
- 93322
- Report Number(s):
- CONF-940711-; TRN: IM9537%%366
- Resource Relation:
- Conference: 25. international symposium on combustion, Irvine, CA (United States), 31 Jul - 5 Aug 1994; Other Information: PBD: 1994; Related Information: Is Part Of Twenty-fifth symposium (international) on combustion; PB: 1838 p.
- Country of Publication:
- United States
- Language:
- English
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