Abstract
Endwall heat transfer characteristics of inclined pin-fin array channels have been investigated to improve the cooling efficiency of gas turbine's combustor liners. The time-mean local Nusselt number profiles were obtained by naphthalene sublimation technique based on the heat/mass transfer analogy. Three kinds of angled pin-fins (-45, 0 and +45 degrees) were tested and compared with each other. As a result, the average heat transfer coefficient on the endwall of normal pin fins was higher than that of the angled pin fins. However, the total amount of heat transfer is expected to be increased by inclined pin fins because the total surface area is about 1.4 times larger than that of normal pin fins, and the pressure loss in angled pin-fin channel was smaller than in the normal pin-fin channel.
