To provide a cooling mechanism provided with a microcircuit for cooling further in a high stress region.
This aerofoil, a rotor blade in this embodiment, has serpentine cooling channels 38, 40, 42. Paths 38, 40, 42 of the serpentine cooling channels have a trapezoidal cross sectional shape by taking coriolis effect into consideration. Since a rotor blade region 100 between a smaller face 43 of the path having a trapezoidal shape and a wall 46 to which the rotor blade opposes has a region having high thermal and mechanical stress, sufficient cooling becomes a problem. The microcircuit 50 being a very thin cooling circuit having a crossing pedestal is buried into the region of the blade. The microcircuit 50 cools further to cope with the problem related to cooling in the region 100.
TELLER BRET
CHON YOUNG
MONGILLO DOMINIC
PIETRASZKIEWICZ EDWARD F
Tomioka Kiyoshi