Layered part premixing low-pollution combustor of main combustion level lean oil premixing

A main combustion stage and combustion chamber technology, applied in the combustion chamber, continuous combustion chamber, combustion method, etc., can solve the problems of critical combustion performance, poor combustion stability and ignition performance, long premixing section in the head, etc. The effect of service life, reducing pollutant emissions and improving quality

Active Publication Date: 2015-03-25
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

Combustion chambers using lean premixed combustion technology have a longer head premixing section, which is prone to spontaneous combustion or flashback; in addition, compared with trad

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  • Layered part premixing low-pollution combustor of main combustion level lean oil premixing
  • Layered part premixing low-pollution combustor of main combustion level lean oil premixing
  • Layered part premixing low-pollution combustor of main combustion level lean oil premixing

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and examples.

[0028] figure 1 It is a cross-sectional view of the structure of the lean premixed stratified partial premixed low-pollution combustor of the present invention, which adopts a stratified partial premixed combustion scheme and a short ring structure scheme, including a casing 1 outside the combustion chamber, a casing 2 inside the combustion chamber, Diffuser 3, igniter 4, flame cylinder outer cylinder 5, flame cylinder inner cylinder 6, fuel injection device 7 and fuel injection rod 12.

[0029] figure 2It is a cross-sectional view of the main combustion stage lean premixed layered partial premixed low-pollution combustion chamber flame cylinder structure of the present invention, the main combustion zone flame is divided into duty-level flame 14 and main com...

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Abstract

The invention discloses a layered part premixing low-pollution combustor of main combustion level premixing and pre-evaporation. The layered part premixing low-pollution combustor has a pre-heating function. Fuel oil is divided into a main combustion level and an on-duty level. Diffusive combustion is adopted by the on-duty level, lean oil premixed combustion is adopted by the main combustion level, and the premixed combustion of a layered part is achieved through coupling of the diffusive combustion and the lean oil premixed combustion. The on-duty level is composed of a centrifugal atomizing nozzle and first level rotational flow air. The fuel oil of the main combustion level is supplied through multi-point direct-injection type nozzles, and oil and air mixing is enhanced through preheating of second level rotational flow air by combination of transverse jet air and on-duty level flame. The on-duty level is used in part-load conditions such as starting and slow operation, a stable combustion range can be broadened, combustion efficiency can be improved, and emission of CO and UHC is lowered; the on-duty level and the main combustion level work at the same time in the heavy load working condition, the on-duty level provides stable ignition sources for the main combustion level, a main combustion area is in a lean oil state, the temperature is far lower than the adiabatic flame temperature, and emission of NOx of high-load conditions can be reduced remarkably.

Description

technical field [0001] The invention relates to a lean premixed low-pollution combustor with a preheating function, in particular to a stratified partial premixed low-pollution combustor which utilizes duty-level preheating to strengthen the mixing of oil and gas in the main fuel stage. Background technique [0002] For gas turbine engines using liquid fuels, fuel atomization and mixing have a decisive impact on engine combustion performance, combustion efficiency and pollutant emissions. Therefore, research on fuel atomization has received attention, which has also promoted the development of fuel atomization nozzles. [0003] The International Civil Aviation Organization's pollutant emission standards for aviation gas turbines are becoming more and more stringent, especially for NOx pollution emission requirements. Low-pollution combustion has become the development trend of modern aero-engine combustors. The requirements of the currently implemented CAEP6 standards are al...

Claims

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Application Information

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IPC IPC(8): F23R3/38F23R3/20
Inventor 刘存喜杨金虎刘富强阮昌龙穆勇徐纲
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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