Plate fin - oval tube 표면에서 Delta Wing Vortex Generators에 의한 국소 열전달 특성

In the present paper, the effect of delta-wing vortex generators(DWVGs) on heat transfer of the plate fin-oval tube heat exchanger was experimentally studied. The local heat transfer coefficient of the tube surface of one kind of DWVGs arrangement were measured by naphthalene sublimation technique for Reynolds numbers of 2000 ~ 3200 and angles of attack of DWVG of 30°~60°. As the results, compared to the case without DWVGs, the heat transfer of the plate fin surface with DWVGs was enhanced from upstream to downstream in the test region. The heat transfer were significantly affected by angles of attack of DWVGs as well as Reynolds number. It showed that the result of 45° was best within test angles.