Abstract:

Under the operation condition of rotating speed of 200～1400 r/min，water flow rate of 40～140 L/h，hot air flow rate of 3～15 m³/h，the heat transfer characteristics of high gravity rotary device was studied with the water-hot air system. The experimental results showed that heat transfer coefficient increased with the increase of rotating speed，water flow rate and hot air flow rate，but the slope of increase reduced with the increase of water flow rate. The increase of heat transfer was also proven by calculation and analysis of heat transfer unit height. Finally an empirical correlation of heat transfer coefficient was derived through dimensional analysis. The statistical tests showed that the results predicted by the correlation equation were in good agreement with the experimental data.