Heat Transfer and Total Friction Factors in the Convergent Channels with V/⋀-shaped Ribs on Two Opposite Walls
양 벽면에 V/⋀형 리브가 있는 수축 채널의 열전달과 전 마찰계수

Myung-Sung Lee, Meo-Seong Heo, Ui-Jae Jeong, Young-Joon Park, Jung-Hyun Yoo, Gun-Woo Im, Soo-Whan Ahn
2016 Journal of the Korea Society For Power System Engineering  
The measurements of heat transfer and total friction factors for turbulent flows in the convergent rectangular channels with two opposite in-line ribbed walls are reported. The study has covered three different angled ribs (30 o , 45 o and 60 o ) and Reynolds number in the range of 22,000 to 75,000. The channel, composing of ten isolated copper sections in the length of test section of 1 m, has the channel convergence ratio of D ho /D hi =0.67. The results show that the ribs pointing downstream
more » ... pointing downstream (⋀ -shaped) is somewhat greater than the ribs pointing upstream (V-shaped) in the dimensionless Nusselt number and total friction factors.
doi:10.9726/kspse.2016.20.5.066 fatcat:7mgimab675h3fc4asspzruzzwe