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.

摘要：

采用热空气-水体系，在转速为200～1400 r/min、水流量为40～140 L/h、热空气范围为3～15 m³/h的实验条件下，研究了热空气-水在超重机中的传热性能。实验结果表明：总传热系数随着转速的升高而增大，随着水流量的增加而增大，但增幅减小，随着热空气流量的增加而增加。对传热单元高度的计算和分析也验证了传热效果的增强。最后推导出传热系数关联式，且进行了统计检验，所得关联式与实验数据拟合较好。