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Combustion chamber head oil and gas mixer

A blender and combustor technology, applied in the field of gas turbine engine combustors, can solve problems such as difficult ignition, achieve the effect of improving fuel atomization quality and combustion efficiency, and reducing pollutant emissions

Inactive Publication Date: 2019-02-15
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing pre-combustion nozzles generally use centrifugal nozzles, and the main combustion nozzles mostly use circular direct injection nozzles. The two cooperate with each other to achieve fuel atomization. However, the existing pre-combustion centrifugal nozzles mostly use oil-rich combustion to improve ignition performance. , it is difficult to achieve ignition under low oil pressure

Method used

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specific Embodiment approach

[0012] Combustor head oil-gas blender of the present invention, its preferred embodiment is:

[0013] It includes a pre-combustion stage assembly located in the center and a main combustion stage assembly located on the periphery of the pre-combustion stage assembly. Arranged pre-combustion stage swirler, the main combustion stage assembly includes a main combustion stage swirler and a plurality of main combustion stage direct injection nozzles arranged on the side wall of the main combustion stage swirl channel, the pre-combustion stage central nozzle and The auxiliary oil passage is communicated, and the direct injection nozzle of the main combustion stage is communicated with the main oil passage.

[0014] The pre-combustion stage swirler includes a first-stage axial swirler and a second-stage radial swirler, the first-stage axial swirler is directly arranged on the periphery of the central nozzle, and the second The first-stage radial swirler is arranged near the outlet o...

specific Embodiment

[0023] Such as figure 1 , figure 2 As shown, the oil-gas blender at the head of the combustion chamber of the present invention includes pre-combustion stage components (1, 2, 3, 4) located in the center and main combustion stage components (5, 6) located on the periphery of the pre-combustion stage components. The pre-combustion stage assembly includes the pre-combustion stage central nozzle 1 and the pre-combustion stage swirlers 2 and 3 arranged on the periphery of the pre-combustion stage central nozzle 1 and arranged coaxially with it. The pre-combustion stage swirler consists of two stages of swirlers , the first stage is the axial swirler 2, the second stage is the radial swirler 3, the fuel injected by the central nozzle 1 of the pre-combustion stage is in the first stage swirl channel 4 and the first stage axial swirler The swirl air of 2 is subjected to preliminary swirl atomization, and under the action of the second-stage radial swirler 3, it is further mixed wit...

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Abstract

The invention discloses a combustion chamber head oil and gas mixer. The combustion chamber head oil and gas mixer comprises a pre-combustion level assembly located in the center and a main combustionlevel assembly located on the periphery of the pre-combustion level assembly; the pre-combustion level assembly comprises a pre-combustion level central nozzle and a pre-combustion level cyclone arranged on the periphery of the pre-combustion level central nozzle and coaxially arranged with the pre-combustion level central nozzle; the main combustion level assembly comprises a main combustion level cyclone and a plurality of main combustion level directly-jetting nozzles arranged on the side wall of a main combustion cyclone channel, the pre-combustion level central nozzle communicates with an auxiliary oil path, and the main combustion level directly-jetting nozzles communicate with a main oil path; and the pre-combustion level cyclone comprises a first-level axial cyclone and a second-level radial cyclone, and the main combustion level cyclone serves as the first level axial cyclone. By improving the angles of pre-combustion level cyclone blades, atomization of the centrifugal nozzle under the working condition of the small oil pressure is guaranteed, the fuel atomization quality is improved, the combustion efficiency is improved, and ignition and quenching performance is improved.

Description

technical field [0001] The invention relates to a combustion chamber of a gas turbine engine, in particular to an oil-gas mixer at the head of the combustion chamber. Background technique [0002] At present, the oil-air blender at the head of the combustor with dual oil circuits is widely used in the combustor of gas turbine engines. The fuel enters the pre-combustion stage and the main Entering the main combustion stage to achieve premixed and partially premixed combustion, thereby reducing the temperature of the main combustion zone, thereby reducing the emission of nitrogen oxides, and a small part of the fuel is supplied into the combustion chamber through the nozzle of the pre-combustion stage. The existing pre-combustion nozzles generally use centrifugal nozzles, and the main combustion nozzles mostly use circular direct injection nozzles. The two cooperate with each other to achieve fuel atomization. However, the existing pre-combustion centrifugal nozzles mostly use...

Claims

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Application Information

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IPC IPC(8): F23R3/38
CPCF23R3/38
Inventor 刘美丽马佳敏张迪王博韬
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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