Accession Number : AD0640501

Title :   HYBRID COMBUSTION AND FLAME STRUCTURES.

Descriptive Note : Final rept. 1 Apr 65-31 Mar 66,

Corporate Author : INSTITUTO NACIONAL DE TECHNICA AEROESPACIAL MADRID (SPAIN)

Personal Author(s) : Tarifa,Carlos Sanchez

Report Date : 31 MAR 1966

Pagination or Media Count : 29

Abstract : The report summarizes the results obtained in a research effort accomplished on (1) hybrid combustion (flame propagation over the surface of a solid or liquid fuel in a gaseous oxidizer environment); and (2) flame structures (hydrogen-oxygen flame with a spherical symmetry and combustion of metals). A theoretical model is presented and discussed for the solution of flame propagation for the case of hybrid (solid-gas) systems based on the assumption that heating of the fuel ahead of the flame governs the flame propagation speed. Theoretical results are compared with those obtained from an experimental investigation of flame propagation along hollow cylinders of thermoplastic fuels through which a flow of oxygen circulates, and they are shown to agree reasonably well. A model is also discussed for the laminar spherical symmetrical hydrogen-oxygen diffusion flame, and analytical expressions relating the fundamental variables of the process are presented. Theoretical calculations are compared with the results obtained from an experimental investigation, and a qualitative agreement was obtained in the position of the flame frong and the surface temperature. (Author)

Descriptors :   (*COMBUSTION, FLAME PROPAGATION), (*FLAMES, SPHERES), FUELS, OXIDIZERS, HYDROGEN, OXYGEN, METALS, DIFFUSION, SUPERSONIC FLOW, MATHEMATICAL MODELS, SPAIN

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE