ISSN Online: 2377-424X
ISBN Print: 0-89116-130-9
International Heat Transfer Conference 6
TURBULENT HEAT AND MASS TRANSFER IN ABRUPTLY CHANGED WALL BOUNDARY CONDITIONS
Abstract
This paper presents the results of theoretical and experimental investigation of heat- and mass-transfer in non-equilibrium turbulent boundary layer at various prehistory of the main flow development and abrupt changes of the surface boundary conditions.
It has been shown that the prehistory influence on heat transfer stops much earlier than the dynamic boundary layer completely relaxes.
The character of heat transfer may be explained in terms of a Seban flow model, if the significant non-similarity of temperature and velocity profiles is taken into consideration. The results on the porous film cooling effectiveness at various degree of flow turbulence ε = 1 + 7%, different length of porous region, under- and super-injections through it are grouped into unit dependence.
It has been shown that the prehistory influence on heat transfer stops much earlier than the dynamic boundary layer completely relaxes.
The character of heat transfer may be explained in terms of a Seban flow model, if the significant non-similarity of temperature and velocity profiles is taken into consideration. The results on the porous film cooling effectiveness at various degree of flow turbulence ε = 1 + 7%, different length of porous region, under- and super-injections through it are grouped into unit dependence.