In order to study the effects of rotation on a realshaped internal cooling channel in the high pressure turbine blade

the heat transfer characteristics of a twopass trapezoidal channel with vertical ribs were studied experimentally

with Reynolds numbers range of 10000－50000

rotation number range of 0－209 and the model orientation angles of 0°

225°and 45°. The results indicated that: for the stationary case

the heat transfer at the trailing wall was stronger than that at the leading wall in the first channel

but it was only slightly larger in the second channel. For the rotating case with the model orientation angle of 0° to the axis of rotation

as the rotation number increased

the heat transfer difference between the trailing wall and the leading wall became larger in the first channel

while the heat transfer at the leading wall gradually became stronger than that at the trailing wall in the second channel. At a high rotation number (rotation number was more than 1)

the heat transfer was the largest for the case with 0°model orientation angle

and the smallest for the case with 45°model orientation angle.