Abstract：Three-dimensional models of louvered fin and inclined louvered fin in fin-tube radiator were respectively established to investigate the fluid flow, the temperature and pressure fields when air flows over the two kinds of fins, and the differences of thermal hydraulic performance between them were analyzed. The calculated results show that the heat transfer factor and the friction factor of inclined louvered fin are both higher than those of louvered fin. Compared with the louvered fin, when Reynolds number varies from 558 to 2 510,j factor of the inclined louvered fin is increased from 29.8% to 18.6%, while f factor is increased from 39.7% to 58.9%. When Reynolds number is small, the maximum difference between the two kinds of j/f 1/3 factors is over 16%. When Reynolds number is over 2 232, the differences is not more than 3.2%. It indicates that the inclined louvered fin has better thermal hydraulic performance than that of louvered fin, especially under the condition of small Reynolds number.
2014, Vol. 35 
