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Contoured axial-radial exhaust diffuser

a diffuser and axial-radial technology, applied in the direction of machines/engines, stators, liquid fuel engines, etc., can solve the problem of significant pressure loss

Inactive Publication Date: 2012-02-09
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the exhaust diffuser design results in significant pressure losses, particularly at the internal struts and turning vanes.

Method used

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  • Contoured axial-radial exhaust diffuser
  • Contoured axial-radial exhaust diffuser
  • Contoured axial-radial exhaust diffuser

Examples

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Embodiment Construction

[0011]One or more specific embodiments of the present invention will be described below. In an effort to provide a concise description of these embodiments, all features of an actual implementation may not be described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

[0012]When introducing elements of various embodiments of the present invention, the articles “a,”“an,”“the,” and “said” are intended to mean that ther...

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Abstract

In accordance with one embodiment, a system includes a gas turbine diffuser. The gas turbine diffuser includes an axial diffuser section including a first duct portion having an axial flow path along a centerline of the gas turbine diffuser. The gas turbine diffuser also includes an axial-radial diffuser section coupled to the axial diffuser section, wherein the axial-radial diffuser section includes a second duct portion having a curved flow path along the centerline from the axial flow path to a radial flow path and the axial-radial diffuser section excludes any turning vane in the second duct portion.

Description

BACKGROUND OF THE INVENTION[0001]The subject matter disclosed herein relates to turbines, and more specifically, to exhaust diffusers for use with gas turbines and steam turbines.[0002]Power generation plants often incorporate turbines, e.g., a gas turbine engine. The gas turbine engine combusts a fuel to generate hot combustion gases, which flow through a turbine to drive a load and / or compressor. At high velocities and temperatures, an exhaust gas exits the turbine and enters an exhaust diffuser. The exhaust diffuser may be an axial-radial exhaust diffuser that transitions the flow from an axial direction to a radial direction. Axial-radial exhaust diffusers incorporate internal structural features such as struts and turning vanes. The internal struts hold walls of the diffuser in a fixed relationship to one another and transfer loads from a rotor to a foundation. The internal turning vanes help divert the flow from the axial to radial direction. Unfortunately, the exhaust diffuse...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04D27/02F04D29/44
CPCF01D25/30
Inventor NANDA, DEEPESH D.PRUTHI, ROHITANSARI, ASIF IQBAL
Owner GENERAL ELECTRIC CO
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