INFLUENCE OF THE SWIRLING OF AN EQUILIBRIALLY DISSOCIATING GAS FLOW IN A TUBE ON HEAT EXCHANGE AND CHEMICAL REACTION IN IT

Results of mathematical simulation of the infl uence of the swirling of a fl ow of an equilibrially dissociating heattransfer agent (nitrogen tetroxide) in a tube on the heat transfer and the chemical reaction in it are presented. It is shown that an increase in the intensity of swirling of such a fl ow in a tube increases the rate of heat exchange in it, with the result that the Nusselt number of the fl ow increases. In this case, the heat transfer in the fl ow depends not only on the integral intensity of its swirling but also on the method of organization of the fl ow swirling. It was established that, in the case of active action of the centrifugal forces on this fl ow, the turbulent disturbances arising in it cause its heat-transfer coeffi cient to increase, and, in the case of conservative action of the centrifugal forces on the fl ow, its heat transfer coeffi cient decreases. It is shown that the rate of heat exchange in the indicated fl ow can be controlled by changing the tangential component of the velocity of the fl ow along the radius of the tube
   
Author:  O. V. Matviyenkoa, P. S. Martynov
Keywords:  heat exchange, chemical reaction, boundary layer, swirling fl ow, computational hydrodynamics
Page:  763