Steady-state experiment and numerical simulation on flow and heat transfer of a rotating cavity with axial flow

The steady-state experiment and numerical simulation were carried out to investigate the flow structure and heat transfer characteristics in the rotating cavity with axial flow. By changing the axial flow coefficient, rotating Reynolds number, etc., the radial distribution of temperature and Nusselt number on both sides of the disk and the inner side of the disk cone under different working conditions was explored. The results show that: the radial distribution of temperature on both sides of the disk is concave, and the heat transfer intensity on the upwind side of the disk is generally higher than that on the leeward side. The cone disk conducts heat conduction to the disks on both ends, and the radial distribution of the wall surface temperature is high in the middle and low on both sides. With the increase of the axial flow coefficient, the gas convection inside the disk cavity was intensified, the radial arm and vortex pair became explicit, and the heat transfer effect on the surface of the rotating disk and the cone disk was enhanced. The flow heat transfer characteristics in the cavity of the rotating disk are influenced by forced convection and Rayleigh-Benard like convection. © 2021, Editorial Board of JBUAA. All right reserved.