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Diffusion chamber acoustic flame tube

A flame tube and combustion chamber technology, applied in the field of diffusion combustion chamber acoustic flame tube, can solve problems such as economic loss

Active Publication Date: 2020-02-14
BEIJING HUAQING GAS TURBINE & INTEGRATED GASIFICATION COMBINED CYCLE ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, thermoacoustic oscillations have also occurred in diffusion combustors fired with hydrogen-rich fuels in several industrial applications, causing great economic losses

Method used

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  • Diffusion chamber acoustic flame tube
  • Diffusion chamber acoustic flame tube
  • Diffusion chamber acoustic flame tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like figure 1 , 2 As shown, the acoustic flame cylinder of the diffusion combustor of this embodiment includes: a head nozzle hole 1 , a flame cylinder body 2 , a combustion chamber cap 3 and a resonator 4 .

[0031] The head nozzle hole 1 is arranged at the front end of the flame tube body 2, the head nozzle hole 1 is used to install the nozzle, the rear end opening of the flame tube body 2 is used to connect the transition section, and the flame tube body 2 is used to limit the reactant flow Moving, the flame cylinder body 2 is provided with a cooling structure 21 and a main combustion hole 22 .

[0032] The combustion chamber cap 3 is arranged between the head nozzle hole 1 and the flame cylinder body 2. The combustion chamber cap 3 is provided with a plurality of divergent cooling holes 31, and the plurality of divergent cooling holes 31 can be evenly distributed in a matrix along the circumferential direction. , There are multiple resonators 4, and the multiple r...

Embodiment 2

[0040] like image 3 As shown, the longitudinal positions of multiple resonant cavities 4 of the acoustic flame tube of the diffusion combustion chamber of the present embodiment are the same and stagger the position of the main combustion hole 22 or the axis of the main combustion hole 23 in the circumferential direction (matching with the number of the main combustion holes 22 ).

Embodiment 3

[0042] like Figure 4 As shown, the multiple resonant cavities 4 of the acoustic flame cylinder of the diffusion combustion chamber in this embodiment have two kinds of radial positions, and the resonant cavities 4 of the two kinds of radial positions are arranged alternately in the circumferential direction.

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Abstract

The invention relates to the technical field of gas turbines, and specifically discloses an acoustic flame tube of a diffusion combustion chamber. The acoustic flame tube comprises a head nozzle hole, a flame tube body, a combustion chamber cover and a plurality of resonators, wherein the head nozzle hole is formed in the front end of the flame tube body; the head nozzle hole is used for installing a nozzle; an opening in the rear end of the flame tube body is used for connecting a transition section; the flame tube body is used for limiting a reactant to flow; the flame tube body is provided with a cooling structure and main combustion holes; the combustion chamber cover is arranged between the head nozzle hole and the flame tube body; a plurality of diffusion cooling holes are formed in the combustion chamber cover; the resonators are arranged on the combustion chamber cover and are in air-tight connection with a working medium in the flame tube body. According to the acoustic flame tube disclosed by the invention, the frequency in the combustion chamber can be effectively regulated, and thermal-acoustic oscillation can be restrained.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to an acoustic flame tube of a diffusion combustion chamber suitable for hydrogen-rich fuel. Background technique [0002] For heavy-duty gas turbines, as the parameter level increases, the average temperature in the combustion chamber also increases, so the risk of thermoacoustic oscillations in the combustion chamber increases. The essence of thermoacoustic oscillation is the coupling of heat release fluctuations and pressure fluctuations inside the combustion chamber. On the one hand, thermoacoustic oscillation will lead to the increase of combustion pollutants and increase the risk of flashback. On the other hand, it will damage the structure of the combustion chamber, resulting in Reduced lifespan. [0003] Control and prediction of thermoacoustic oscillations is a difficult problem in heavy-duty gas turbine combustors. The methods of thermoacoustic oscillation control i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23R3/42
Inventor 李珊珊方子文吕煊张永良
Owner BEIJING HUAQING GAS TURBINE & INTEGRATED GASIFICATION COMBINED CYCLE ENG TECH