Trapped vortex combustor

A burner, swirl technology, used in combustion chambers, combustion equipment, combustion methods, etc.

Inactive Publication Date: 2006-06-07
DRESSER RAND CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, challenges have existed in the fuel introduction methodology and the configuration of the flame holder that

Method used

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  • Trapped vortex combustor
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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0044] figure 1 A detailed view of an exemplary embodiment of a shut-off vortex combustor 30 for a gas turbine is provided. An inlet fluid, typically compressed air A, indicated by the reference letter A, is delivered through an inlet 34 defined between an inner inlet wall 36 and an outer inlet wall 38 . Downstream of the inlet 34, the inlet fluid A is divided into three streams, an external cooling air supply flow B, a combustion air supply flow C and an internal cooling air supply flow D. The leading edges 40 and 42 thus separate the incoming air. An external cooling air supply flow is contained within an outer plenum 44 defined between a combustor outer wall 46 and an outer plenum wall 48 . An internal cooling air supply flow D is contained between the inner plenum 50 defined between the inner combustor wall 52 and the inner plenum wall 54 . As shown, each of the walls 48, 46, 52 and 54 are placed in a solid portion by a tubular cylindrical portion of the desired diamete...

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PUM

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Abstract

Cut-off vortex combustors for gas turbines. The annular burner housing has a plurality of inlet centerpieces arranged along the helical axis. The inlet centerbody includes a leading edge structure, opposing side walls, a pressurizable chamber, and a rear wall. The inlet center body cooperates with the adjacent structure and the rear body bluff body to define a shut-off swirl chamber combustor for mixing the inlet fluid and combustible fuel to form hot combustion gases. Mixing is enhanced by utilizing posts adjacent to the rear wall to create swirls in the fluid flow, and by injecting fuel and/or air in the opposite direction to the swirl created by the bulk fluid flow. The hot combustion gases are used in a turbine for kinetic energy extraction or in a heat exchange device for thermal energy recovery. High combustion efficiency can be obtained and the emission of nitrogen oxides and carbon monoxide is less than 10ppm.

Description

technical field [0001] The invention relates to the technical field of combustion. More particularly, the invention relates to the design of combustors, especially for use in gas turbines. Background technique [0002] Gas turbines have been widely used as the main prime mover in stationary power stations. However, improvements in combustion efficiency are needed, which would be particularly beneficial in order to reduce emissions. In various attempts to achieve this improvement, various methods and structures, both experimental and commercial, have been attempted. Some of these attempts have included utilizing recirculation zones to provide a continuous source of ignition by mixing hot combustion products with an input fuel and air mixture. Structural devices such as swirl vanes, bluff bodies, and rearward facing steps have generally been employed in establishing the recirculation zone to stabilize the flame. However, challenges have existed in the fuel introduction met...

Claims

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Application Information

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IPC IPC(8): F23R3/58F01D1/02F01D1/32F02C3/16F02K7/00F02K7/10F23RF23R3/18F23R3/20F23R3/28F23R3/50
CPCF01D1/026F01D1/32F02C3/165F02K7/005F02K7/10F05D2220/60F05D2250/25F23R3/18F23R3/28F23R3/50
Inventor 唐纳德·肯德里克肖恩·P·劳勒罗伯特·C·斯蒂尔
Owner DRESSER RAND CO
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