1993 Volume 10 Issue 3 Pages 401-411
Numerical simulation of gas flow in a fin-tube type heat exchanger model has been conducted. The simulation model is two-dimensional and has three inlet ports at the lower boundary and one exit port at the upper boundary. The flow field is partitioned into several sub-channels by spacers. In order to realize the uniform temperature distribution at the exit port and relatively uniform heat transfer rate among the spacers,It is necessary to arrange so that the higher temperature fluid is injected from center port at lower velocity and the lower temperature fluid is injected from both side ports at higher velocity. The thermal flow visualization experiment with thermosensitive liquid-crystal sheet has confirmed the simulation results.
