Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

HEAT AND MASS TRANSFER IN A FULLY DEVELOPED BOUNDARY LAYER ALONG A BURNING VERTICAL WALL

Get access (open in a dialog) DOI: 10.1615/IHTC8.630
pages 1133-1138

Abstrakt

In this work we present a model for the combustion and propagation zone developing along a vertical burning wall and compare the results with experimental ones. To reduce computing time without decreasing accuracy on wall heat fluxes we used Prandtl mixing length as turbulence model. We adapted this model to our case in order to take into account of turbulence production through buoyancy forces, to close conservation equation of Shvab-Zeldovitch variable fluctuations, and to obtain a value different of zero for turbulent viscosity inside the flame despite a zero velocity gradient. A probabilistic turbulent combustion model using a presumed probability density function has been used to obtain mean and fluctuating temperatures through the reacting zone. Laser doppler velocity and turbulence measurements, temperatures obtained with thin termocouples and burning rate through solid weight loss measurements have been compared with success to numerical results.