RT Journal Article
ID 78f9e2f744c87c6f
A1 Kiml, Robert
A1 Mochizuki, Sadanari
A1 Murata, Akira
T1 Effects of Rib Height on Heat Transfer Performance Inside a High Aspect Ratio Channel with Inclined Ribs
JF Journal of Enhanced Heat Transfer
JO JEH(T)
YR 2003
FD 2003-12-01
VO 10
IS 4
SP 431
OP 444
AB Heat transfer and pressure drop experiments were performed in a rectangular high aspect ratio channel (5:1, 45 ґ 9 mm) representing a turbine blade trailing edge cooling passage. The oblique ribs were attached to two opposing long side walls and were intended to function as secondary flow inducers as well as turbulators to improve the heat transfer of the both rib-roughened and rear (one of the short side walls) walls. The experiments were performed for three rib heights—h = 3 mm, h = 2 mm, and h = 1 mm (h-rib height)—for two rib arrangements, transverse (90°) and inclined (60°). It was verified that (1) the heat transfer enhancement on the rear wall was attributed to the rib-induced secondary flow, which carries the cold air from the passage core region toward the rear wall and enhances the heat transfer appreciably; and (2) heat transfer and pressure drop strongly deteriorate with a decreasing rib height because of the weakening of the rib-induced positive effects as a turbulence promoter and secondary flow inducer.
PB Begell House
LK https://www.dl.begellhouse.com/journals/4c8f5faa331b09ea,6c6e1f58370cb2c0,78f9e2f744c87c6f.html