With the development of the aero engine

the temperature before turbine is increasing greatly and it becomes more and more important to study new cooling technology and equipment.Experiments have been carried out to investigate a new cooling technology which used the thermal driving of fluid in small size circular enclosure to enhance the heat transfer rate.In this paper

the characteristics of flow and heat transfer of the thermal driving of R12 varying with the rotating speed were investigated.All the results show that the characteristics are similar with those in gravity;and the average temperature

the gradients of temperature of the heated wall decrease when the rotating speed increases;and at the same time

the average heat transfer rate is enhanced greatly.When the rotating speed reaches 1140 r/min

the rate will go to 1550 W/m2·K.