Gas turbine inner shroud with array of protuberances
AssigneeDoosan Heavy Industries Construction Co., Ltd
InventorsGene Chong, Jae Bin Lee, Yunchang Jang, Haneul Kim, David Ohlschwager
Life of this patent
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Abstract
An inner shroud block component for a gas turbine. The inner shroud block has a surface with a plurality of wells formed therein. An array of protuberances extend away from a base surface of each of the wells. The array of protuberances produces convective cooling of the inner shroud block, resulting in increased cooling of the inner shroud block and better part life. The increased cooling capacity also allows the turbine to operate at higher temperatures, which results in additional power generation.
Claims19
An inner shroud block having a forward end and an aft end, and having sides extending between the forward end and the aft end, comprising:
- an inward facing surface;
- an outward facing surface opposite the inward facing surface;
- a plurality of wells formed in the outward facing surface, the wells having a base surface below the outward facing surface;
- and
- an array of protuberances formed on the base surface of each of the plurality of wells, and extending away from the base surface,
- the protuberances having a bell shaped profile, the bell shaped profile comprising a base portion having a first diameter, a middle portion having a second diameter, and a top portion having a third diameter, wherein the first diameter is greater than the second diameter and the second diameter is greater than the third diameter,
- wherein each protuberance has a height and a mean-average-diameter, wherein a ratio of height over mean-average-diameter is greater than 0.5.
A shroud assembly comprising:
- an outer shroud having a forward lip and a rearward lip configured to couple with a casing of a gas turbine engine;
- a plurality of inner shrouds, each inner shroud comprising:
- an inward facing surface;
- an outward facing surface;
- a plurality of wells formed in the outward facing surface, the wells having a base surface below the outward facing surface;
- and
- an array of protuberances formed on a bottom surface of each of the plurality of wells, and extending away from the base surface, wherein each protuberance has a height and a mean-average-diameter, wherein a ratio of height over mean-average-diameter is greater than 0.5;
- and
- each inner shroud coupled to the outer shroud such that the inward facing surface faces away from the outer shroud and the outward facing surface faces the outer shroud.
Dependencies are inferred from the claim text.