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US 7,114,916 B2Granted
Tailored turbulation for turbine blades
AssigneeUnited Technologies Corporation
InventorsBryan P. Dube, William Abdel-Messeh, Daniel Herrera, Richard Page
Life of this patent
Estimating the term…
Abstract
A turbine blade having improved cooling characteristics is provided. The turbine blade has an airfoil portion having a span, and at least one cooling passageway in the airfoil portion extending from a root portion of the airfoil portion to a tip portion of the airfoil portion. A plurality of turbulation promotion devices are placed in the at least one cooling passageway. The turbulation promotion devices have a P/e ratio which varies along the span of the airfoil portion, where P is the pitch between adjacent turbulation promotion devices and e is the height of the turbulation promotion devices.
Claims22
A turbine engine component comprising:
- an airfoil portion having a span;
- at least one cooling passageway in said airfoil portion extending from a root portion of said airfoil portion to a tip portion of said airfoil portion;
- and
- a plurality of turbulation promotion devices in said at least one cooling passageway, said turbulation promotion devices comprising a plurality of spaced apart pairs of arcuately shaped trip strips, said turbulation promotion devices having a P/e which varies along the span of said airfoil portion, where P is the pitch between adjacent ones of said turbulation promotion devices and e is the height of each said turbulation promotion device,
- wherein the P/e ratio of said turbulation promotion devices is lower in a midspan region of said at least one cooling passageway than in an end region of said at least one cooling passageway and wherein said P/e ratio is in the range of from 5 to 30 in said midspan region.
2 more elements
A turbine engine component comprising:
- an airfoil portion having a span;
- at least one cooling passageway in said airfoil portion extending from a root portion of said airfoil portion to a tip portion of said airfoil portion;
- a plurality of turbulation promotion devices in said at least one cooling passageway, said turbulation promotion devices comprising a plurality of spaced apart pairs of arcuately shaped trip strips, said turbulation promotion devices having a P/e which varies along the span of said airfoil portion, where P is the pitch between adjacent ones of said turbulation promotion devices and e is the height of each said turbulation promotion device;
- wherein the P/e ratio of said turbulation promotion devices is lower in a midspan region of said at least one cooling passageway than in an end region of said at least one cooling passageway, and
- wherein said P/e ratio is in the range of from 5 to 30 in said end region.
2 more elements
A turbine engine component comprising:
- an airfoil portion having a span;
- at least one cooling passageway in said airfoil portion extending from a root portion of said airfoil portion to a tip portion of said airfoil portion;
- a plurality of turbulation promotion devices in said at least one cooling passageway, said turbulation promotion devices comprising a plurality of spaced apart pairs of arcuately shaped trip strips, said turbulation promotion devices having a P/e which varies along the span of said airfoil portion, where P is the pitch between adjacent ones of said turbulation promotion devices and e is the height of each said turbulation promotion device;
- and
- wherein said pitch in a region near said root portion varies from 0.050 to 0.500 inches.
2 more elements
A turbine engine component comprising:
- an airfoil portion having a span;
- at least one cooling passageway in said airfoil portion extending from a root portion of said airfoil portion to a tip portion of said airfoil portion;
- a plurality of turbulation promotion devices in said at least one cooling passageway, said turbulation promotion devices comprising a plurality of spaced apart pairs of arcuately shaped trip strips, said turbulation promotion devices having a P/e which varies along the span of said airfoil portion, where P is the pitch between adjacent ones of said turbulation promotion devices and e is the height of each said turbulation promotion device;
- and
- wherein said pitch in a mid-span region varies from 0.050 inches to 0.500 inches.
2 more elements
A turbine engine component comprising:
- an airfoil portion having a span;
- at least one cooling passageway in said airfoil portion extending from a root portion of said airfoil portion to a tip portion of said airfoil portion;
- a plurality of turbulation promotion devices in said at least one cooling passageway, said turbulation promotion devices comprising a plurality of spaced apart pairs of arcuately shaped trip strips, said turbulation promotion devices having a P/e which varies along the span of said airfoil portion, where P is the pitch between adjacent ones of said turbulation promotion devices and e is the height of each said turbulation promotion device;
- and
- wherein said pitch in a region near said tip portion varies from 0.050 inches to 0.500 inches.
2 more elements
A turbine engine component comprising:
- an airfoil portion having a span;
- at least one cooling passageway in said airfoil portion extending from a root portion of said airfoil portion to a tip portion of said airfoil portion;
- a plurality of turbulation promotion devices in said at least one cooling passageway, said turbulation promotion devices comprising a plurality of spaced apart pairs of arcuately shaped trip strips, said turbulation promotion devices having a P/e which varies along the span of said airfoil portion, where P is the pitch between adjacent ones of said turbulation promotion devices and e is the height of each said turbulation promotion device;
- and
- wherein said height varies from 0.004 inches to 0.050 inches.
2 more elements
A turbine engine component comprising:
- an airfoil portion having a span;
- at least one cooling passageway in said airfoil portion extending from a root portion of said airfoil portion to a tip portion of said airfoil portion;
- a plurality of turbulation promotion devices in said at least one cooling passageway, said turbulation promotion devices comprising a plurality of spaced apart pairs of arcuately shaped trip strips, said turbulation promotion devices having a P/e which varies along the span of said airfoil portion, where P is the pitch between adjacent ones of said turbulation promotion devices and e is the height of each said turbulation promotion device;
- and
- wherein said at least one cooling passageway has a diameter D and the ratio of e/D is in the range of 0.05 to 0.30.
2 more elements
A method for manufacturing a turbine engine component comprising:
- forming a component having an airfoil portion with a root portion, a tip portion and a span;
- fabricating at least one cooling passage in said component having a plurality of turbulation promotion devices having a P/e ratio which varies along the span of said component, where P is the pitch between adjacent ones of said turbulation promotion devices and e is the height of a respective turbulation promotion device;
- said fabricating step further comprising providing a first region of each said cooling passage adjacent said root portion of said airfoil portion with turbulation promotion devices having a first P/e ration and providing a mid span region of each said cooling passage with turbulation promotion devices having a second P/e ratio which is lower than said first P/e ratio;
- and
- said fabricating step further comprising providing a third region of each said cooling passage adjacent said tip portion of said airfoil portion with turbulation promotion devices having a third P/e ratio which is greater than said second P/e ratio.
2 more elements
A turbine engine component comprising:
- an airfoil portion having a span;
- at least one cooling passageway in said airfoil portion extending from a root portion of said airfoil portion to a tip portion of said airfoil portion;
- and
- a plurality of turbulation promotion devices in said at least one cooling passageway, said turbulation promotion devices having a P/e which varies along the span of said airfoil portion, where P is the pitch between adjacent turbulation promotion devices and e is the height of each said turbulation promotion device;
- each said cooling passageway having a first region adjacent said root portion of said airfoil portion with a plurality of said turbulation promotion devices having a first P/e, a mid span region having a plurality of said turbulation providing devices having a second P/e ratio which is lower than said first P/e, and a third region adjacent said tip portion of said airfoil portion with a plurality of said turbulation promotion devices having a third P/e ratio which is greater than said second P/e ratio.
2 more elements
Dependencies are inferred from the claim text.