Cooling for gas turbine engine components

Patent metadata

Field	Value
Publication number	US-10196902-B2
Application number	US-201514854606-A
Country	US
Kind code	B2
Filing date	Sep 15, 2015
Priority date	Sep 15, 2014
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A gas turbine engine component includes a body with a wall surrounding an interior cavity. The wall has opposed interior and exterior surfaces. The interior surface has a plurality of coolant inlets and the exterior surface has a coolant outlet defined therein. A coolant conduit extends between the coolant inlets and the coolant outlet and is configured and adapted to induce secondary flow vortices in coolant traversing the coolant conduit and in an adherent coolant film over a portion of the exterior surface of component body.

First claim

What is claimed is:

1. A gas turbine engine component, comprising:
a wall having a plurality of surfaces including an interior surface and an exterior surface opposite the interior surface, wherein the interior surface is an upstream surface and the exterior surface is a downstream surface, the interior surface facing an interior portion of the component, and
a film-cooling channel extending between the interior surface and exterior surface, the film-cooling channel including:
a primary passage having a primary inlet along the interior surface and a primary outlet along the exterior surface to form a primary flow vector on a primary axis, and
a plurality passage segments having a respective plurality of segment inlets along the interior surface and a respective plurality of segment outlets, the plurality of segment outlets joining with the primary passage at mutually offset joining locations along the primary axis,
the plurality of passage segment forming a respective plurality of segment flow vectors, the plurality of segment flow vectors being on a respective plurality of segment axises that are mutually skewed and skewed from the primary axis, so that the plurality of stream-wise joining locations within the primary passage form a respective plurality of vortex regions,
a metering segment downstream of the plurality of joining locations, wherein a flow area at an inlet of the metering segment is less than an aggregate of flow areas defined by the plurality of segment outlets, and
the metering segment including:
a flow settling segment fluidly connected to the inlet of the metering segment, and a flow development segment fluidly connected to the flow settling segment and the coolant outlet, the flow settling having a first discrete length to induce a uniform velocity therein, and the flow development segment having a second discrete length to induce a uniform boundary layer therein against the film-cooling channel, the second discrete length differing from the first discrete length.

2. The component as recited in claim 1 , further including a diffusor defined in the wall and in fluid communication with the coolant outlet.

3. The component of claim. 1 ,
including a divider extending inwardly from the interior surface and into the interior portion to divide the interior portion into a plurality of internal cavities, including a first internal cavity and a second internal cavity, and
wherein
the primary inlet is disposed in the first internal cavity, and
the plurality of passage segments include a first segment having a first segment inlet, the first segment inlet being disposed in the second internal cavity.

4. The component of claim 3 wherein
the plurality passage segment include a second segment having a second segment inlet, the second segment inlet being disposed in the first internal cavity.

5. The component of claim 4 wherein the first segment is flow-wise longer than the second segment.

6. A component as recited in claim 1 , wherein the gas turbine engine component is a rotor blade or stator vane.

7. An airfoil for a gas turbine engine, comprising:
a wall having a plurality of surfaces including an interior surface and an exterior surface opposite the interior surface, wherein the interior surface is an upstream surface and the exterior surface is a downstream surface, the interior surface facing an interior portion of the component, and
a film-cooling channel extending between the interior surface and exterior surface, the film-cooling channel including:
a primary passage having a primary inlet along the interior surface and a primary outlet along the exterior surface to form a primary flow vector on a primary axis, and
a plurality passage segments having a respective plurality of segment inlets along the interior surface and a respective plurality of segment outlets, the plurality of segment outlets joining with the primary passage at mutually offset joining locations along the primary axis,
the plurality of passage segments forming a respective plurality of segment flow vectors, the plurality of segment flow vectors being on a respective plurality of segment axises that are mutually skewed and skewed from the primary axis, so that the plurality of stream-wise joining locations with the primary passage form a respective plurality of vortex regions,
a metering segment downstream of the plurality of joining locations, wherein a flow area at an inlet of the metering segment is less than an aggregate of flow areas defined by the plurality of segment outlets, and
the metering segment including:
a flow settling segment fluidly connected to the inlet of the metering segment, and a flow development segment fluidly connected to the flow settling segment and the coolant outlet, the flow settling having a first discrete length to induce a uniform velocity therein, and the flow development segment having a second discrete length to induce a uniform boundary layer therein against the film-cooling channel, the second discrete length differing from the first discrete length.

8. The airfoil of claim 7
including a divider extending inwardly from the interior surface and into the interior portion to divide the interior portion into a plurality of internal cavities, including a first internal cavity and a second internal cavity, and
wherein
the primary inlet is disposed in the first internal cavity, and
the plurality of passage segments include a first segment having a first segment inlet, the first segment inlet being disposed in the second internal cavity.

9. The airfoil of claim 8 wherein
the plurality of passage segments include a second segment having a second segment inlet, the second segment inlet being disposed in the first internal cavity.

10. The airfoil of claim 9 wherein the first segment is flow-wise longer than the second segment.

11. A gas turbine engine, comprising:
a compressor section;
a gas turbine engine component in fluid communication with the compressor section through a coolant conduit, the gas turbine engine component including:
a wall having a plurality of surfaces including an interior surface and an exterior surface opposite the interior surface, wherein the interior surface is an upstream surface and the exterior surface is a downstream surface, the interior surface facing an interior portion of the component, and
a film-cooling channel extending between the interior surface and exterior surface, a film-cooling channel including:
a primary passage having a primary inlet along the interior surface and a primary outlet along the exterior surface to form a primary flow vector on a primary axis, and
a plurality passage segments having a respective plurality of segment inlets along the interior surface and a respective plurality of segment outlets, the plurality of segment outlets joining with the primary passage at mutually offset joining locations along the primary axis,
the plurality of passage segments forming a respective plurality of segment flow vectors, the plurality of segment flow vectors being on a respective plurality of segment axises that are mutually skewed and skewed from the primary axis, so that the plurality of stream-wise joining locations within the primary passage form a respective plurality of vortex regions,
a metering segment downstream of the plurality of joining locations, wherein a flow area at an inlet of the metering segment is less than an aggregate of flow areas defined by the plurality of segment outlets, and
the metering segment including:
a flow settling segment fluidly connected to the inlet of the metering segment, and
a flow development segment fluidly connected to the flow settling segment and t

Assignees

• United Technologies Corp

Inventors

• Moore Sasha M
• Jennings Timothy J
• Slavens Thomas N
• Musto Clifford J
• Loricco Nicholas M
• Clum Carey
• Mcbrien John
• Whitfield Christopher
• Quach San

Classifications

• F01D9/041

  using blades (F01D5/148 takes precedence) · CPC title

• F05D2240/81

  Cooled platforms · CPC title

• F05D2220/32

  in gas turbines · CPC title

• F05D2240/12

  Fluid guiding means, e.g. vanes · CPC title

• F23R2900/03042

  Film cooled combustion chamber walls or domes · CPC title