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A centrally staged low-emission combustor head with a pre-combustion stage using a pre-membrane structure

A technology of central grading and pre-combustion, which is applied in the combustion chamber, continuous combustion chamber, combustion method, etc., to achieve the effect of simple structure, good atomization effect and good atomization effect.

Active Publication Date: 2019-12-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in order to achieve the purpose of low-pollution combustion, it is necessary to ensure the atomization quality of fuel under different working conditions

Method used

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  • A centrally staged low-emission combustor head with a pre-combustion stage using a pre-membrane structure
  • A centrally staged low-emission combustor head with a pre-combustion stage using a pre-membrane structure
  • A centrally staged low-emission combustor head with a pre-combustion stage using a pre-membrane structure

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Embodiment Construction

[0026] Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment:

[0027] Such as figure 1 , figure 2 , image 3As shown, a kind of pre-combustion stage described in the embodiment of the present invention adopts the center-staged low-emission combustion chamber head of the pre-diaphragm structure, and adopts the design features of the center stage and pre-combustion stage dual oil circuits, mainly composed of pre-combustion Stage oil rod 1, pre-combustion stage centrifugal nozzle 2, pre-membrane plate 3, pre-combustion stage cyclone 4, interstage section 5, main combustion stage cyclone 6, main combustion stage oil circuit connector 7, main combustion stage Outer ring 8, anti-tempering ring 9 constitute. The pre-membrane plate 3 is welded on the pre-combustion stage cyclone 4 and welded with the interstage section 5 as a whole. The interstage section 5 is used to isolate the flames of the pre-combustion stage and the...

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Abstract

The invention discloses a center split-stage low-emission combustor head having a precombustion stage with pre-film plate structure. The center split-stage low-emission combustor head has split-stagecenter and dual-oil-circuit precombustion stage design. Dual oil circuits of the precombustion stage include a main oil circuit and an auxiliary oil circuit. In case of low fuel flow, only the auxiliary oil circuit of the precombustion stage provides fuel so that a nozzle gains high atomizing quality under small conditions. In case of high fuel flow, the main oil circuit and auxiliary oil circuitof the precombustion stage provide fuel at the same time. The fuel supplied by the main oil circuit of the precombustion stage is sprayed to the inner surface of a pre-film plate through spray holes of the main oil circuit of the precombustion stage, and an oil film is formed. The oil film breaks under the action of internal and external air cyclones, and good atomizing effect can be ensured. Theprecombustion stage dual-oil-circuit design can ensure high atomizing quality for the nozzle within a wide working pressure range, sufficient combustion of the fuel in a combustor is benefited, and pollutant generation is reduced.

Description

technical field [0001] The invention relates to the technical field of the head of a low-emission combustion chamber, in particular to a central staged low-emission combustion chamber head with a pre-combustion stage adopting a pre-membrane structure. Background technique [0002] Civil aviation engines must meet airworthiness regulations when they are put into use, and the requirements for pollutant emissions in airworthiness regulations are getting higher and higher. According to the regulations of the International Civil Aviation Organization (ICAO), carbon monoxide (CO), unburned hydrocarbons (UHC), smoke (Smoke), and nitrogen oxides (NOx) are the main pollutants produced by aero-engines. Among them, CO and UHC are mainly generated in low power state in large quantities, and Smoke and NOx are mainly generated in high power state. The core of reducing pollution emissions is to control temperature and temperature uniformity, lean oil premixed pre-evaporation (low emission...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23R3/16F23R3/28F23R3/38
CPCF23R3/16F23R3/286F23R3/38
Inventor 王建臣宋恒王志超林宇震张弛
Owner BEIHANG UNIV