| Title |
Effect of Number of Heating Walls on Heat Transfer in Ribbed Rectangular Channel |
| Authors |
배성택 ; 안수환 ; 김명호 ; 이대희 ; 강호근 |
| Keywords |
Fully developed turbulent flow ; 완전히 발달된 난류유동 ; Rough square duct ; 거친 사각덕트 ; Number of heating walls ; 가열벽면 수 ; Heat transfer coefficient ; 열전달계수 |
| Abstract |
Surface heat transfer of a fully developed turbulent air flow in a 45° inclined ribbed square duct with two and four heating walls was experimentally investigated, at which the experimental works were performed for Reynolds numbers ranging from 7,600 to 26,000. The pitch-to-rib height ratio,, was kept at 8 and rib-height-to-channel hydraulic diameter ratio, was kept at 0.0667. The channel length-to-hydraulic diameter ratio, was 60. The heat transfer coefficient values were decreased with the increase in the number of heating walls. Results of this investigation could be used in various applications of internal channel turbulent flow involving roughened walls. |