FLAME CONFIGURATION IN ENTANGLED STREAMS,
Abstract
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 rho(u 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 m/sec discharging into a cocurrent flow of combustion products with a velocity of 22 m/sec 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 08, 1967
- Accession Number
- AD0677514
Entities
People
- A. S. Ippolitiv
- V. A. Dvoinishnikov
Organizations
- National Air and Space Intelligence Center