Accession Number : AD0269350

Title :   EFFECTS OF CONDUCTION AND VISCOSITY ON THE STABILITY OF LAMINAR FLAME

Corporate Author : BROWN UNIV PROVIDENCE RI

Personal Author(s) : PARLANGE, J Y ; CHU, BOA-TEH

PDF Url : AD0269350

Report Date : Sep 1961

Pagination or Media Count : 24

Abstract : The effects of conduction and viscosity on the stability of laminar flame are examined. If L denotes the ratio of the wave length of a disturbance to the flame width and alpha is the ratio of the ultimate temperature of the burned gas to the initial temperature of the fresh mixture, the flame is found to be stable if L is less than (or equal to) 2 alpha/(alpha-1) multiplied by 1/ RePr where Re is the Reynolds number of the flame based on the flame width and Pr denotes the Prandtl number of the mixture. It is further shown that the stabilization is achieved primarily through the effect of heat conduction on the flame speed rather than the influence of viscosity.

Descriptors :   *FLAMES, *FLUID FLOW, *LAMINAR BOUNDARY LAYER, CHEMICAL REACTIONS, DIFFERENTIAL EQUATIONS, ELECTRICAL CONDUCTIVITY, EQUATIONS, EXHAUST GASES, GAS IONIZATION, GASES, HEAT, LIQUIDS, MACH NUMBER, MOLECULAR STRUCTURE, PARTIAL DIFFERENTIAL EQUATIONS, PERTURBATION THEORY, PRESSURE, STABILITY, TEMPERATURE, THEORY, VISCOSITY

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE