1806 噴出口近傍に設置した2平板による衝突噴流熱伝達制御 : 平板間隔の影響(G06-2 伝熱(2),G06 熱工学)

抄録

Experiments of an impinging jet heat transfer on a target plate were carried out for the case that two flat plates were parallelly mounted in both sides of the nozzle exit. The jet velocity was kept constant at 10m/s, and the Reynold's number based on nozzle width, h=15mm, was about 9500. The distance, H, between the nozzle and the target plate was 2, 3, 4 or 5 times of h. The space, W, of two flat plates changed from 2.67h to 6.67h or 8h in each H/h. The local Nusselt number on the geometric stagnation point and spatial mean Nusselt number on the target plate became maxima for each H/h value in some W/h values. The maximum local and spatial mean Nusselt number were augmented by about 50% and 45% compared to the ones for normal impinging jet without the mounting of two plates respectively.