Heat Transfer Augmentation on Flat Plate with Two-Dimensional Rods in Impinging Air Jet System[2]:Effect of rod pitch

충돌판(衝突板) 근방(近傍)에 배열(配列)된 2차원(次元) Rod가 충돌분류(衝突噴流) 열전달(熱傳達)에 미치는 영향(影響)[2]:Rod 피치변화(變化)에 대한 효과(效果)

The propose of this study is augmentation of heat transfer without additional external power in 2-dimensional impinging air jet. The passive heat transfer augmentation method tried in this experimental study is placement of rod bundles with the clearance, 2mm, in front of the heat transfer surface. The effects of pitch distance among rods and nozzle-to-target plate distance are investigated. The overall heat transfer rate of flat plate with rods reaches maximum at H/B=10 and P=40mm, and for H/B=2 and P=40mm the augmentation rate of heat transfer becomes maximum to a value which is about 1.57 times that of the flat plate without rods.