Turbine blade having squealer
First Claim
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1. A turbine blade comprising:
- an air foil including a plurality of cooling flow passages through which a cooling medium flows from a leading edge region to a trailing edge region;
a top plate which forms the apex of the air foil, has a heat-resistant coating applied on the upper surface thereof, and includes a plurality of cooling holes; and
a squealer which protrudes radially outward from the blade from the top plate, and is formed so as to extend from a leading edge end to a starting end of the trailing edge region along a suction-surface-side blade wall in a peripheral direction of the blade,wherein a portion of the top plate between the starting end of the trailing edge region and the trailing edge end is not provided with the squealer, and the height of the top plate is set to be lower than the height of the top surface of the squealer by at least a predetermined value in consideration of variations in the finished height of the heat-resistant coating.
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Abstract
A turbine blade of the invention includes an air foil including a plurality of cooling flow passages through which a cooling medium flows from a leading edge region to a trailing edge region, a top plate which forms the apex of the air foil, has a heat-resistant coating applied on the upper surface thereof, and includes a plurality of cooling holes, and a squealer which protrudes radially outward from the blade from the top plate, and is formed so as to extend from a leading edge end to a starting end of the trailing edge region along a suction-surface-side blade wall in a peripheral direction of the blade.
19 Citations
8 Claims
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1. A turbine blade comprising:
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an air foil including a plurality of cooling flow passages through which a cooling medium flows from a leading edge region to a trailing edge region; a top plate which forms the apex of the air foil, has a heat-resistant coating applied on the upper surface thereof, and includes a plurality of cooling holes; and a squealer which protrudes radially outward from the blade from the top plate, and is formed so as to extend from a leading edge end to a starting end of the trailing edge region along a suction-surface-side blade wall in a peripheral direction of the blade, wherein a portion of the top plate between the starting end of the trailing edge region and the trailing edge end is not provided with the squealer, and the height of the top plate is set to be lower than the height of the top surface of the squealer by at least a predetermined value in consideration of variations in the finished height of the heat-resistant coating. - View Dependent Claims (2, 3, 4)
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5. A turbine blade comprising:
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an air foil including a plurality of cooling flow passages through which a cooling medium flows from a leading edge region to a trailing edge region; a top plate which forms the apex of the air foil, has a heat-resistant coating applied on the upper surface thereof, and includes a plurality of cooling holes; and a squealer which protrudes radially outward of the blade from the top plate, is formed from a starting end of the trailing edge region along a suction-surface-side blade wall to a leading edge end in a peripheral direction of the blade, and is further formed so as to continuously extend from the leading edge end along a pressurized-surface-side blade wall to the starting end of the trailing edge region, wherein a portion of the top plate between the starting end of the trailing edge region and the trailing edge end is not provided with the squealer, and the height of the top plate is set to be lower than the height of the top surface of the squealer by at least a predetermined value in consideration of variations in the finished height of the heat-resistant coating. - View Dependent Claims (6, 7, 8)
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Specification