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Wheel space purge flow mixing chamber

A technology of mixing chamber and purging tube, which is used in air transportation, cooling of turbine/propulsion, machine/engine, etc., which can solve problems such as reducing the performance of gas turbines

Inactive Publication Date: 2017-07-28
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Diverted cooling fluid is not used in combustion, reducing gas turbine performance

Method used

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  • Wheel space purge flow mixing chamber
  • Wheel space purge flow mixing chamber
  • Wheel space purge flow mixing chamber

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Embodiment Construction

[0101]Broadly speaking, embodiments of the invention disclosed herein enable the tuning of cooling fluid in a more compact gas turbine engine that provides four stages in a space previously used to provide three stages. Axial space for this engine is thus limited, and the system for delivering cooling fluid (such as purge flow from the compressor) to the forward wheel space requires 25% less space than that of previous engines. Embodiments of the invention disclosed herein solve this problem by providing a mixing chamber formed in the deflector and connected to the purge tube of the vane to receive cooling fluid, such as from an engine, and at least one outlet channel. The purge flow of the compressor, the at least one outlet channel passes through the side wall of the mixing chamber, through the deflector to the surface of the deflector, and thus to the wheel space near the deflector, to keep the reduced usable space The heat transfer flow properties of . In particular, form...

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Abstract

Cooling air extracted from a gas turbine engine compressor is sent to nozzle vane cooling passage inlets, through the cooling passages, and to purge tubes of a set of two or more vanes. A mixing chamber formed between the purge tubes in a diaphragm cavity receives fluid from the purge tubes and directs it through exit passage(s) formed through a wall of the mixing chamber to a surface of the diaphragm. The exit passage(s) can be inclined to induce a fluid velocity component substantially parallel to the surface and / or in a rotation direction of a turbine wheel.

Description

technical field [0001] The present application relates generally to cooling systems on turbomachines, and more particularly to systems for conditioning cooling fluid within a wheelspace region of a turbomachine. Background technique [0002] Some turbines, such as thermal gas turbine engines, may employ one or more combustors in which combustion of a fuel-air mixture produces a hot gas supply. The hot gas, which may also be referred to as the working fluid, is directed from the combustion chamber through a working fluid path to one or more turbine wheels where it is caused to flow between the turbine buckets or blades, which The turbine impellers are mounted in peripheral rows. These vanes or blades react against impinging hot gas or working fluid to convert energy in the gas, such as kinetic energy, into rotational movement of the turbine wheel. In some cases, the turbine wheels are mounted on a common shaft, and the air compressor and rotating turbine wheel then also dri...

Claims

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Application Information

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IPC IPC(8): F01D25/12F01D9/02F01D9/06
CPCF01D9/02F01D9/065F01D25/12F05D2220/32F05D2260/202F05D2240/10F02C7/18F05D2260/232Y02T50/60F01D25/14F05D2240/128
Inventor M.P.斯科丰J.E.阿尔伯特M.R.贝里M.A.梅里尔
Owner GENERAL ELECTRIC CO