%0 Journal Article %A Li, Shian %A Xie, Gongnan %A Zhang, Weihong %A Sunden, Bengt %D 2012 %I Begell House %K heat transfer, rib, continuous, truncated, computation %N 6 %P 573-590 %R 10.1615/HeatTransRes.2012005855 %T NUMERICAL PREDICTIONS OF PRESSURE DROP AND HEAT TRANSFER IN A BLADE INTERNAL COOLING PASSAGE WITH CONTINUOUS/TRUNCATED RIBS %U https://www.dl.begellhouse.com/journals/46784ef93dddff27,4bd3f39072fbf393,06f9ec8c37628dc1.html %V 43 %X Ribs are often used in the mid-section of internal turbine blades to augment heat transfer from the blade wall to a coolant, but most research works are concerned only with continuous ribs attached to the side walls. In this paper, a turbulent flow and heat transfer of a rectangular passage with continuous and truncated ribs on opposite walls have been predicted numerically. Two types of ribs are studied: 90-deg ribs and 45-deg V-shaped ribs. The inlet Reynolds numbers range from 12,000 to 60,000. The complex three-dimensional turbulent flows inside the blade internal coolant passage and heat transfer between the rib-walls and side-walls are presented. The overall performances of six different ribbed passages are evaluated and compared. Numerical results show that the passage with truncated V-shaped ribs is very effective in improving the heat transfer performance with a low pressure drop. %8 2012-12-20