대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)
- 제11권2호
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- Pages.214-221
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- 1987
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- 1225-5963(pISSN)
DOI QR Code
四角리브를 갖는 傳熱面에 衝突하는 2次元 噴流의 熱傳達에 관한 硏究
Heat Transfer of a Two-Dimensional Jet Impinging on the Wall with Transverse Repeated Ribs of Square Cross-Section
- 발행 : 1987.03.01
초록
본 논문에서는 2차원충돌분류에서 사각리브(rib)를 갖는 요철형전열면에 대한 실험에 관한 것이며, 리브의 높이를 (e=5nm) 일정하게 하고 리브의 피치(p=25,35,50 nm) 변화, 노즐출구와 전열면간 거이(H/B=1~14) 및 노즐출구유속(u
The purpose of this study is augmentation of heat transfer without additional power in the case of rectangular air jet which impinges vertically on the heating surface. The experimental results are obtained heat transfer augmentation of a two-dimensional impinging jet using the surface roughness of transverse repeated-rib type. The integral average heat transfer coefficient of ribbed plate is about two times larger than that of flat plate. In order to supplement the information about the mechanism of heat transfer augmentation, the flow structure in the stagnation region is visually studied by using the smoke wire technique. The heat transfer augmentation is due to the effect of stretching of large scale vortex in the stagnation region.
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