EXPERIMENTAL AND 3D NUMERICAL STUDY OF AIR SIDE HEAT TRANSFER AND PRESSURE DROP OF SLOTTED FIN SURFACE

摘要

Experimental and numerical investigation of air side heat transfer and fluid flow performance of a typical slotted fin surface with "X" arrangement of strips is presented. Three-dimensional numerical computation was made in which the tube configuration is simulated with step-wise approximation, and the fin efficiency is also calculated with conjugated computation. The numerical results are verified by the experimental data and the experimental correlation of friction factor and heat transfer coefficient are provided. The performances of the slotted and plain plate fin surfaces are compared. It is found that the slotted fin-and-tube heat transfer surfaces has excellent performance compared to the plain plate fin heat transfer surfaces. The numerical results are further analyzed with the field synergy principle.