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Premixing and pre-evaporating combustion chamber

A combustion chamber and pre-evaporation technology, applied in combustion chambers, continuous combustion chambers, combustion methods, etc., can solve the problems of high CO and UHC emissions, low equivalence ratio in the combustion area, and inability to meet the requirements of low engine pollution, so as to reduce pollution. The effect of emission, low pollution emission

Active Publication Date: 2010-05-19
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the low power state, the equivalent ratio of the combustion zone is very low, which is far lower than the above-mentioned equivalence ratio range required for low-pollution combustion. At this time, although NOx emissions are low, CO and UHC emissions are high
In addition, because the conventional combustion chamber generally adopts the diffusion combustion method, the local equivalence ratio is very uneven, so for the conventional combustion chamber, it cannot meet the low pollution requirements in the entire engine operating range

Method used

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Embodiment Construction

[0031] Such as figure 1 with figure 2 As shown, the premixed pre-evaporation combustor designed by the present invention has a single-ring cavity structure, and adopts the concept design of staged combustion. The flame combustion organization mode, the main combustion stage adopts the premixed pre-evaporation combustion organization mode, and the cooling gas and the mixed gas are supplied from the flame tube. This combustion chamber comprises two combustion areas---the pre-combustion level combustion area 6 and the main combustion level combustion area 7, two combustion areas share the same inner and outer boundaries, the outer boundary of the combustion area is the outer wall 15 of the flame tube, and the inner boundary of the combustion area It is the inner wall 16 of the flame tube, and the outer wall 15 of the annular flame tube and the inner wall 16 of the flame tube are located between the annular casing 9 outside the combustion chamber and the casing 10 inside the com...

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Abstract

The invention discloses a premixing and pre-evaporating combustion chamber, which has a single annular chamber structure and adopts a conceptual design of fractional combustion. In the combustion chamber, the total combustion gas volume is supplied by a pre-combustion fraction and a main combustion fraction, the pre-combustion fraction adopts a swirl-flow stable diffusion flame combustion organization mode and the main combustion fraction adopts a premixing and pre-evaporating combustion organization mode. The combustion chamber mainly comprises a shunting diffuser, a combustion chamber outer casing, a combustion chamber inner casing, a fuel oil nozzle, the pre-combustion fraction, the main combustion fraction, a combustion liner outer wall and a combustion liner inner wall. The pre-combustion fraction stabilizes flame by using a low-speed refluxing zone generated by swirl air entering the combustion chamber from a pre-combustion fraction swirler; and after being sprayed out by a main combustion fraction nozzle, the fuel oil needed by the main combustion fraction first form an oil-gas mixed gas through atomization under the action of an air flow in a prefilming air ring in the main combustion fraction nozzle and then flows to the premixing and pre-evaporating fraction to be evaporated and further blended with the air, so a uniform oil-gas mixed gas jet flow is formed at the position of the outlet of the premixing and pre-evaporating fraction and enters the combustion liner to be ignited by flame in the pre-combustion fraction to combust. The combustion chamber is simple in structure and can effectively reduce pollutant discharge while ensuring an aeroengine works normally.

Description

technical field [0001] The invention relates to an aviation gas turbine combustor adopting a premixed pre-evaporative combustion organization mode. The combustor adopting the premixed pre-evaporative combustion organization mode has a simple structure, and can reduce combustion pollution emissions while ensuring efficient and stable operation of the combustor . Background technique [0002] The basic performance and structural distribution of modern aero-engine combustors have reached a fairly high level, but for modern aero-engine combustors, there are still a lot of problems and challenges. The development of new materials, new processes, new structures, and new concepts Application is the source to ensure its continuous progress. [0003] The main development trend of modern aero-engine combustors is low-pollution combustion. Aeroengine combustors must meet increasingly stringent aeroengine pollution emission standards. The currently adopted CAEP4 (Committee on Aviatio...

Claims

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Application Information

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IPC IPC(8): F23R3/30F23R3/52F23R3/58
Inventor 林阳林宇震许全宏张弛刘高恩
Owner BEIHANG UNIV
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