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Wall elements for gas turbine engines

a gas turbine engine and wall element technology, applied in the direction of machines/engines, efficient propulsion technologies, light and heating apparatus, etc., can solve the problems of reducing the amount of cooling fluid required to obtain the desired amount of cooling, increasing the efficiency of cooling flow, etc., and achieving the effect of reducing the amount of cooling airflow

Inactive Publication Date: 2013-02-28
ROLLS ROYCE PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a better way to cool things down that requires less air to cool them.

Problems solved by technology

This may increase the efficiency of the cooling flow, and thus decrease the amount of cooling fluid required to obtain a desired amount of cooling.

Method used

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  • Wall elements for gas turbine engines
  • Wall elements for gas turbine engines
  • Wall elements for gas turbine engines

Examples

Experimental program
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Embodiment Construction

[0042]With reference to FIG. 1, a ducted fan gas turbine engine generally indicated at 10 has a principal and rotational axis X-X. The engine 10 comprises, in axial flow series, an air intake 11, a propulsive fan 12, an intermediate pressure compressor 13, a high-pressure compressor 14, combustion equipment 15, a high-pressure turbine 16, an intermediate pressure turbine 17, a low-pressure turbine 18 and a core engine exhaust nozzle 19. A nacelle 21 generally surrounds the engine 10 and defines the intake 12, a bypass duct 22 and a bypass exhaust nozzle 23.

[0043]The gas turbine engine 10 works in a conventional manner so that air entering the intake 11 is accelerated by the fan 12 to produce two air flows: a first air flow A into the intermediate pressure compressor 14 and a second air flow B which passes through the bypass duct 22 to provide propulsive thrust. The intermediate pressure compressor 13 compresses the air flow A directed into it before delivering that air to the high p...

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PUM

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Abstract

A double-wall structure for use in components in gas turbine engines that are exposed to high temperatures has a first wall spaced apart from a second wall. The first wall has a protrusion extending therefrom towards the second wall. The second wall has a cooling fluid orifice, or hole, through which cooling fluid is directed in use towards the protrusion. The protrusion extends across a significant percentage of the gap between the first and second walls. The cooling fluid removes heat from protrusion as it flows over it through convection, thereby cooling the first wall. The cooling fluid is also redirected so as to become more aligned with the first wall as it flows over the protrusion. In some cases, a trench is provided at the base of the protrusion. The cooling fluid causes a vortex to form in the trench, thereby further assisting cooling.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based upon and claims the benefit of priority from British Patent Application Number 1114745.1 filed 26 Aug. 2011, the entire contents of which are incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]This invention relates to cooling in gas turbine engines, and in particular to cooling wall elements for use in wall structures of components, such as combustors and turbines, of gas turbine engines.[0004]Combustors of gas turbine engines can be constructed with a double-wall (also known as a double-skin) structure. Typically, an annular combustor may have radially inner and outer walls, each having a double-wall structure. Other elements of a gas turbine engine that are exposed to high temperature can be similarly constructed with a double-wall structure. Such a double-wall structure has an external wall and an internal wall. In the case of a combustor, the internal wall is usually fo...

Claims

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Application Information

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IPC IPC(8): F23R3/00F28D15/00
CPCF23R3/002Y02T50/675F23R2900/03044F23R2900/03041Y02T50/60
Inventor GREGORY, JONATHAN M.
Owner ROLLS ROYCE PLC