Turbine blade with platform cooling
A turbine rotor blade with a platform includes platform cooling channels on the pressure side and the suction side of the platform. The cooling channels are formed from straight section that generally follows a contour of the airfoil in order to provide cooling to as much of the platform surfaces as possible. Pressure side cooling channels have a V-shape from inlet to outlet. Suction side channels branch off from a common channel located along a suction side edge of the platform.
1. An industrial engine turbine rotor blade comprising:
an airfoil extending from a platform;
the platform having a pressure side surface and a suction side surface;
a plurality of V-shaped cooling channels formed within the platform on the pressure side of the platform;
each V-shaped cooling channel includes an inlet hole located on a forward side of the platform and opening on a bottom side of the platform;
a straight common cooling channel located on the suction side of the platform and extending along a side edge from a forward side of the platform to an aft side of the platform;
a plurality of straight cooling channels on a forward side of the suction side of the platform each connected to an inlet hole opening on the bottom side of the platform and connected to the straight common cooling channel; and,
a plurality of straight cooling channels on an aft side of the suction side of the platform each connected to the straight common cooling channel.
2. The industrial engine turbine rotor blade of claim 1 , and further comprising:
the cooling channels on the pressure side of the platform discharge onto a pressure side edge of the platform; and,
the cooling channels on the suction side of the platform discharge onto an aft side edge of the platform.
3. The industrial engine turbine rotor blade of claim 1 , and further comprising:
the straight sections of the platform cooling channels generally follow an airfoil contour of an adjacent airfoil surface.
4. The industrial engine turbine rotor blade of claim 1 , and further comprising:
the inlet holes for the pressure side and suction side platform cooling channels are located along a line on the forward side of the platform at a point about where the airfoil leading edge is located.
5. The industrial engine turbine rotor blade of claim 1 , and further comprising:
the pressure side and suction side platform cooling channels include trip strips in locations where hot spots are likely to occur on the platform due to an over-temperature from inadequate cooling; and,
the cooling channels at locations where hot spots are not likely to occur do not include trip strips.