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Combustor casing for combustion dynamics mitigation

A combustion chamber and shell technology, which is applied in the field of slowing down the combustion dynamics in the combustion chamber, and can solve problems such as changes in heat release rate and high pressure fluctuations in the combustion chamber

Inactive Publication Date: 2012-11-14
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This fluctuation can cause large changes in the heat release rate and can lead to high pressure fluctuations in the combustion chamber

Method used

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  • Combustor casing for combustion dynamics mitigation
  • Combustor casing for combustion dynamics mitigation
  • Combustor casing for combustion dynamics mitigation

Examples

Experimental program
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Embodiment Construction

[0015] figure 1 Shown is a combustor 10 having a cylindrical combustor housing 12 . The combustion chamber housing 12 has an inwardly inclined wall 14 which can effectively reduce the volume of the combustion chamber housing 12 . Said inwardly inclined wall 14 forms a damper for slowing down the combustion dynamics. By providing or forming the damper 14 within the combustor housing 12, economical production is achieved without separately providing an external damper.

[0016] Figures 2 to 4 Shown is an annulus carrying or having continuous or segmented wall segments that would reduce the volume within the combustor casing. in particular, figure 2 Shown is a ring plate 20 having a continuous inwardly inclined wall 21 for reducing the volume within the combustor housing when the ring is positioned or secured within the combustor housing. image 3 Shown is a ring plate 30 with segmented and corrugated projections 31 which also serve to reduce the volume in the combustion c...

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PUM

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Abstract

The present invention provides a combustor casing for combustion dynamics mitigation. A dampener or resonator is provided within a combustor casing to mitigate combustion dynamics. A head end volume of the combustor casing is reduced by the resonator to mitigate combustion dynamics. The resonator is formed by a ring-shaped plate that carries / is provided with a continuous inwardly protruding wall or segmented inwardly protruding wall portions. The resonator can be a stand alone part that is inserted into the combustor casing or it can be integrally formed with the combustor casing.

Description

technical field [0001] The present invention generally relates to combustion chambers. More specifically, the present invention relates to the mitigation of combustion dynamics in combustion chambers. Background technique [0002] Due to the increasingly stringent emission requirements of gas turbines, traditional diffusion flame combustors have been converted to dry low NOx (DLN), dry low emissions (DLE), or lean fuel premixed (LPM) Combustion system development. These DLN / DLE / LPM combustors use a fuel-lean air mixture (equivalence ratio 0.58:0.65) in fully premixed mode of operation to reduce NOx and CO emissions. Since these combustors operate at such lean fuel / air (f / a) ratios, small changes in velocity fluctuations result in large changes in mass flow and fuel-air fluctuations. [0003] Such fluctuations can cause large changes in the heat release rate and can lead to high pressure fluctuations in the combustion chamber. The interplay between room acoustics, fuel / ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/42
CPCF23R3/002F23R2900/00014
Inventor 金冠佑D·沙马S·贝特克付勇强
Owner GENERAL ELECTRIC CO