System and method for cooling turbine blades
First Claim
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1. A system, comprising:
- a turbine blade comprising at least one cooling slot configured to convey a coolant in a flow direction from an interior to an exterior of the turbine blade, wherein the cooling slot comprises;
an entrance coupled to the interior;
a converging section downstream from the entrance, wherein the converging section comprises a first cross-sectional area that decreases in the flow direction; and
an exit disposed along a trailing edge of the turbine blade, wherein the cooling slot comprises at least one of;
only one metering section, wherein the metering section is disposed only downstream from the converging section;
orthe exit of the cooling slot is disposed along the trailing edge on a midline between a pressure sidewall and a suction sidewall, wherein the exit comprises a diverging section;
ora combination thereof.
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Abstract
A system includes a turbine blade, which includes at least one cooling slot configured to convey a coolant in a flow direction from an interior to an exterior of the turbine blade. The cooling slot includes an entrance coupled to the interior and a converging section downstream from the entrance. The converging section includes a first cross-sectional area that decreases in the flow direction. The cooling slot also includes an exit disposed along a trailing edge of the turbine blade.
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Citations
23 Claims
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1. A system, comprising:
a turbine blade comprising at least one cooling slot configured to convey a coolant in a flow direction from an interior to an exterior of the turbine blade, wherein the cooling slot comprises; an entrance coupled to the interior; a converging section downstream from the entrance, wherein the converging section comprises a first cross-sectional area that decreases in the flow direction; and an exit disposed along a trailing edge of the turbine blade, wherein the cooling slot comprises at least one of; only one metering section, wherein the metering section is disposed only downstream from the converging section;
orthe exit of the cooling slot is disposed along the trailing edge on a midline between a pressure sidewall and a suction sidewall, wherein the exit comprises a diverging section;
ora combination thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system, comprising:
a rotary blade, comprising; a leading edge; a trailing edge; a pressure sidewall; a suction sidewall; a cooling cavity disposed between the pressure sidewall and the suction sidewall; and a plurality of cooling slots coupled to cooling cavity, wherein the plurality of cooling slots is configured to pass a coolant in a flow direction through the trailing edge, and each slot of the plurality of cooling slots comprises; a converging section comprising a first cross-sectional area that decreases in the flow direction; only one metering section, wherein the metering section is coupled to the converging section, wherein the metering section is disposed only downstream from the converging section, and the metering section comprises a second cross-sectional area that is substantially constant in the flow direction; and an exit disposed along the trailing edge on a midline between the pressure sidewall and the suction sidewall, wherein the exit comprises a diverging section. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method, comprising:
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forming a ceramic turbine blade core; inserting the core into a die; and casting a turbine blade between the core and the die with a pressure sidewall and a suction sidewall coupled together at a leading edge and a trailing edge, wherein the turbine blade comprises a plurality of cooling slots configured to pass a coolant in a flow direction through the trailing edge, and each slot of the plurality of cooling slots comprises; a converging section comprising a first cross-sectional area that decreases in the flow direction; a metering section coupled to the converging section; and an exit disposed along the trailing edge, wherein each slot of the plurality of cooling slots comprises at least one of; only the one metering section, wherein the metering section is disposed only downstream from the converging section;
orthe exit is disposed along the trailing edge on a midline between the pressure sidewall and the suction sidewall, wherein the exit comprises a diverging section;
ora combination thereof. - View Dependent Claims (20, 21, 22, 23)
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Specification