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Machining ring type pre-film cyclone

A machine-added ring, swirler technology, applied in lighting and heating equipment, combustion methods, combustion chambers, etc., can solve the problems of oscillating combustion flame tubes or heads, ablation, etc., to eliminate angular vortices and save costs , the effect of improving performance and structural reliability

Inactive Publication Date: 2021-12-31
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Angular vortices can also cause oscillatory combustion phenomena and flame tube or head ablation failures

Method used

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  • Machining ring type pre-film cyclone
  • Machining ring type pre-film cyclone
  • Machining ring type pre-film cyclone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and the specific implementation process.

[0033] 1) The present invention is mainly composed of a central nozzle A, a primary cyclone B, a secondary cyclone C, a venturi tube D, cold air passages E and H, a machined ring straight section F, and a machined ring arc surface section G .

[0034] 2) working principle of the present invention sees image 3 , the impact of the fuel sprayed from the center nozzle A forms a thin liquid film on the inner wall of the venturi tube D, and is discharged at the lip or trailing edge of the venturi tube D, and flows through the primary swirler B and the secondary swirler C Oil mist is formed under the shear action. In the process of moving downstream, the oil mist passes through the machined ring arc surface section G to form a secondary pre-film to further improve the fuel atomization effect, and the oil mist and air are well mixed b...

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Abstract

The invention provides a machining ring type pre-film cyclone. An outlet section of a sleeve of a conventional cyclone is designed into a machining ring structure, fuel oil sprayed out of a center nozzle impacts on a venturi tube to form an oil film, primary pre-film atomization is formed under the shearing action of primary cyclone gas and secondary cyclone gas, then oil mist passes through the arc surface of the machining ring structure to be subjected to secondary pre-film atomization, the fuel oil atomization quality can be effectively improved, the mixing and distribution of the fuel oil at an outlet of the cyclone are enhanced, the ignition performance of a combustion chamber is improved, and the temperature distribution of the outlet is improved. In addition, due to the introduction of a machining ring, the secondary cyclone gas flow enters the ring and can play a cooling role, meanwhile, due to the existence of a slope limiting area, the angle vortex of the combustion chamber can be weakened or eliminated, then the combustion instability is inhibited, and the ablation risk of a flame tube is reduced. The machining ring type pre-film cyclone can be used in the fields of gas turbine engines and the like.

Description

technical field [0001] The invention relates to the fields of gas turbine engines and the like, in particular to a machine-added ring type pre-film cyclone. Background technique [0002] The continuous development of high-performance aero-engines has put forward higher requirements for fuel atomization technology, and it is necessary to ensure complete combustion in a shorter combustion zone to shorten the length and weight of the combustion chamber; better organize the concentration field in the main combustion zone , because the high-temperature rise combustor is used to adjust the gas volume shortage of the outlet temperature field; higher requirements for ignition performance and lean flameout range; lower pollutant emissions to meet the low pollution emission requirements of future aviation gas turbines. [0003] With the continuous improvement of the pressure ratio and temperature rise of the aero-engine combustion chamber, some problems have been exposed in the use of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/28F23R3/38F23R3/10
CPCF23R3/286F23R3/38F23R3/10F23R2900/03043
Inventor 王志凯范玮赵明皓张三省
Owner NORTHWESTERN POLYTECHNICAL UNIV
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