Study On Heat Transfer Performance Of Parallel Axis Rotating Heat-Pipe With Corner

In this paper, we proposed a new type heat-pipe called Parallel-Axis Rotating Heat-Pipe with Corner to transmit heat caused by friction between the action wheel and the driven wheel, heat source position had a distance of rotating-axis. Overall winged needle was adopted to strengthen heat transmission at this heat-pipe's condenser. Cone was substituted by overall meander that formed a corner. Liquid centrifugal force could be used to help the returning of condensation liquid. Heat-pipe's evaporation part was installed near the heat source directly.The relationship between liquid membrane wetting rate and fill ration was studied by numerical simulation. VOF model was used to research the liquid film distribution. The research found that, at the 1㎜ end of this heat-pipe's evaporation section, liquid membrane wetting rate increased with the increasing of fill ration. When fill ration less than twenty percent, the wall was wet partially, when fill ration more than twenty percent, the wall was wet wholly. When fill ration near to twenty percent, liquid film thickness reached its minimum.Heat transfer performance of this new type heat-pipe was studied by experimental. The corner was fifteen degree, fill ration ranged from ten percent to twenty five percent, heat flux was about 7×103 ~5.3×104W/㎡, the cooling wind caused by the heat-pipe revolving round the parallel-axel, Reynolds number ranged from 2.3×103 to 1.2×104, The experimental results indicated that this heat-pipe could start in one minute, the process of heat transfer was ensured. When fill ration was twenty percent, heat transfer performance of this heat-pipe was best. Its heat transfer capacity increased gradually with the increasing of rotational speed. When rotational speed less than five hundreds rpm, we could use suction to help returning condensate fluid, when rotational speed more than five hundreds rpm, there was no need to do that. Comparison between this new type heat-pipe and cone-type heat pipe showed that the former thermal resistance had only about half of later under the same conditions.