Low-emission combustion chamber with main combustion stage adopting two-stage vertical mixing

A combustion chamber and main combustion stage 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, uneven local equivalence ratio, etc., and achieve pollution emissions. Reduce and enhance the effect of uniformity

Active Publication Date: 2019-05-10
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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Problems solved by technology

In the small state, the equivalence ratio of the combustion zone is very low, far below the 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 th

Method used

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  • Low-emission combustion chamber with main combustion stage adopting two-stage vertical mixing
  • Low-emission combustion chamber with main combustion stage adopting two-stage vertical mixing
  • Low-emission combustion chamber with main combustion stage adopting two-stage vertical mixing

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the descriptio...

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Abstract

The invention discloses a low-emission combustion chamber with a main combustion stage adopting two-stage vertical mixing, and relates to the technical field of aviation gas turbines. The low-emissioncombustion chamber adopts a classification combustion scheme; the head part of the combustion chamber is divided into a precombustion stage and the main combustion stage; the precombustion stage adopts a centrifugal nozzle to directly spray fuels to form dispersion combustion to stabilize flame of the combustion chamber; and fuels of the main combustion stage adopt an unique two-stage spraying vertical mixing mode to spray into a first-grade cyclone and a second-grade cyclone to form primary mixing; and then, the fuels adopt two-stage vertical mixing to enter a premixing channel for secondarymixing. The fuels of the main combustion stage adopt a twice-division mixing mode to greatly improve the mixing uniformity of the fuels and air, so that the pollution emission of the whole landing and takeoff cycle of an aviation engine combustion chamber is further reduced.

Description

technical field [0001] The invention relates to the technical field of aviation gas turbines, in particular to a low-emission combustion chamber in which the main combustion stage adopts two-stage vertical mixing. Background technique [0002] The basic performance and structural distribution of modern aero-engine combustors have reached a fairly high level, but there are still a lot of problems and challenges for modern aero-engine combustors. The development and application of new materials, new processes, new structures, and new concepts It is the source to ensure its continuous progress. The main development trend of modern civil aeroengine combustors is low-pollution combustion. Combustion chambers of civil aeroengines must meet increasingly stringent aeroengine pollution emission standards. The currently adopted CAEP6 (Committee on Aviation Environmental Protection) standard has very strict regulations on pollutant emissions, especially the requirements for NOx pollu...

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Application Information

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IPC IPC(8): F23R3/28F23R3/12
Inventor 王波甘晓华莫唯书姚强
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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