2차원 난류 벽부착제트의 대류열전달 특성

DOI QR코드

DOI QR Code

윤순현;이대희;송흥복;김대성
Yun, Sun-Hyeon;Lee, Dae-Hui;Song, Heung-Bok;Kim, Dae-Seong

  • 발행 : 1996.10.01

초록

An experimental study on the convective heat transfer characteristics was performed for a two-dimensional wall attaching offset jet(WAOJ). Thermochromic liquid crystal was used to measure the plate wall temperature. The Nusselt number was measured for Reynolds numbers from 6, 500 to 39, 000, and the offset ratios from 0.5 to 15. The maximum Nusselt number point coincides with the time-averaged reattachment point and Nusselt number decreases monotonically after the jet reattaches on the wall. In the recirculation region Nusselt number minimize near the upstream corner and then increases as X/D decreases to vanishes. This suggests the existence of secondary vortices, causing an additional mixing of the flow in the corner. The correlations between the local Nusselt number and Reynolds number, Re, offset ratio, H/D, and streamwise distance, X/D are presented.

키워드

액정;대류열전달;벽부착제트;금박막;컬러 영상처리장치;Nusselt 수