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Multi-vortex combustion method

A combustion method and multi-scroll technology, which can be used in combustion methods, combustion chambers, combustion equipment, etc., and can solve problems such as total pressure loss in a stable working range and restrictions on outlet temperature requirements.

Active Publication Date: 2013-04-10
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stable working range is limited by the total pressure loss of the combustion chamber, the outlet temperature requirements, and the lean and rich flameout boundaries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The combustion-supporting air at the head of the combustion chamber enters from the middle swirl device 1, the upper swirl device 2 and the lower swirl device 3 installed on the head wall 11, as figure 2 shown.

[0053] The middle swirl device 1, the side swirl devices 2 and 3 all use radial swirlers.

[0054] With the assistance of the upper pair of air injection 7 and the lower pair of air injection 8, multiple closely adjacent recirculation vortex regions are formed near the head of the combustion chamber during the low working condition experiment: as image 3 The middle vortex zone 4, the upper vortex zone 5, and the lower vortex zone 6 are shown.

[0055] When the fuel passes through the channel of the radial swirler of the intermediate swirl device 1, it is mixed with the air that also enters from the channel of the radial swirler of the intermediate swirl device 1 while diffusing to become a semi-premixed combustible gas. Helps reduce pollutant emissions. Su...

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Abstract

The invention discloses a multi-vortex combustion method and relates to the technique of stable combustion. The low working condition stability of industrial and civil gas combustion devices and gas turbine combustion chambers is increased. According to the method, combustion air enters from a middle rotational flow device 1, an upper rotational flow device 2 and a lower rotational flow device 3 mounted on a head part wall surface 11 at the heat part of a combustion chamber; and under the assisting of impinging combustion air streams 7 and 8, a plurality of backflow vortex areas (4, 5 and 6) are formed near the head part of the combustion chamber. The fuel gas and the combustion air combust in the one or more generated backflow vortexes and transmit flame to each other. The multi-vortex combustion method is mainly characterized in that the free transition and zooming of a plurality of combustion vortexes in a flow area near the head part are realized, so that the change of fuel quantity or air quantity is adapted, the stable combustion is kept, and the lean blowout performance is improved.

Description

technical field [0001] The invention relates to a method for burning various calorific value gas fuels in a limited space, which belongs to the stable combustion technology of gas fuel combustion, especially for those gases with low calorific value and low flame propagation speed, through the combustion flow organization to improve combustion stability at low operating conditions. Background technique [0002] A wide and stable working range is an important performance index of a combustion device. The stable working range is limited by the total pressure loss of the combustor, the outlet temperature requirement, and the lean and rich flameout boundaries. All operating points must fall within the specified stability range. The lean quenching performance of the combustor is an important content in the study of combustion stability. A lot of related research has been done on lean quenching at home and abroad. In terms of improving combustion stability through a reasonable o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/12F23R3/16F23R3/58
Inventor 袁怡祥谭春青谢鹏福曹文宇曾德堂陈聪余超詹德君高庆陈海生
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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