Numerical investigation of the heat transfer in an annulus cylindrical space

Abstract

This work concerns the numerical study of the transfer of heat by convection in annulus-cylindrical space of an axial flow of air, between a rotor turning at constant angular velocity and a fixed stator. Three cases of geometric configurations are studied. Initially, the surfaces of the rotor-stator are smooth. In a second step, the rotor wall is corrugated along the cylinder and the other is smooth and the last case is to achieve the same grooves on the stator. The numerical results obtained in rotating flow (for different rotation speed of the rotor) showed that the presence of the grooves increases the heat transfer as the speed in-creases. In the presence of an axial air flow, the results conducted in turbulent show that the case of smooth magnetic gap is interesting in terms of heat. This numerical study is performed with the code CFX.11 and based on the use of a turbulence model: SST (Shear-Stress-Transport) to evaluate the heat transfer in the Rotor-stator configuration.