FLAME CONFIGURATION IN ENTANGLED STREAMS,

A method was developed for calculating the flame configuration and the temperature field in a flame generated by a homogeneous, combustible gas jet of finite width discharging into a cocurrent infinite stream of combustion products. The problem was solved with a computer for an incompressible fluid using L. A. Vulis hypothesis Issledovaniye fizicheskikh osnov rabochego protsessa topok i pechey. Izd. AN KazSSR, 1957 that the product rhou sq. rho density, u velocity is equal for compressible and incompressible fluids. The method was applied to determine the flame configuration of a 60 mm wide methane-air jet with an air excess coefficient of 1.87, an initial temperature of 473K, and a velocity of 46.5 msec discharging into a cocurrent flow of combustion products with a velocity of 22 msec and a temperature of 1673K. The latter temperature corresponds to the theoretical combustion temperature of the methane-air mixture. A graph of the temperature, velocity, and heat release across the boundary layer showed that combustion takes place in a narrow zone 10-15 mm wide. The maximum heat release does not occur at the maximum temperature but at about 1473K. Axial temperature and velocity profiles showed that the increases in temperature and velocity in the axial direction are less steep than in radial direction. Author