Investigation of the flow structure and heat transfer intensity of surfaces with split plate finning

Abstract

The authors use CFD modeling to study three types of heat exchange surfaces, i.e. a basic plate fin surface and two modified split plate surfaces – without rotation and with rotation of the split sections at an angle of 30° against the incoming air flow. Thermal aerodynamic characteristics of the studied heat exchange surfaces are obtained and verified with experimental data. The flow patterns are presented in three sections along the height of the channels in the finned area. An explanation is offered for the intensification of heat transfer in the modified heat exchange surfaces. It is shown how geometrical and operating parameters influence the heat transfer intensity and aerodynamic resistance. The results can be useful in designing cooling systems for electronics, particularly microprocessor and microlaser devices, power amplifiers of transmitting modules for radar systems, promising energy-saving solid-state light sources, power electronics for electric vehicles, equipment for aviation and space-rocket electronics with heat pipes.