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Spiral pipe type air atomizing nozzle

A technology of air atomization and spiral tube, applied in the direction of injection device, liquid injection device, etc., can solve the problem of insufficient fuel atomization, achieve the effect of enhancing atomization effect, improving uniformity and ensuring stability

Active Publication Date: 2021-01-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose a spiral tube air atomizing nozzle to solve the problem of insufficient fuel atomization at the present stage

Method used

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  • Spiral pipe type air atomizing nozzle
  • Spiral pipe type air atomizing nozzle
  • Spiral pipe type air atomizing nozzle

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Embodiment Construction

[0024] The present invention will be further described now in conjunction with accompanying drawing:

[0025] combine figure 1 , The invention provides a helical tube air atomizing nozzle which can effectively improve the atomization effect of liquid fuel and reduce pollution discharge.

[0026] Specific process:

[0027] The gas enters from the nozzle head, part of it passes through the axial swirler 1 to form an outer ring airflow, and the other part enters the spiral tube 5 to form an inner ring airflow. The outer ring airflow forms a high-speed rotating turbulent flow in the inner chamber 2 . The inner ring airflow accelerates and rotates in the spiral tube 5 and flows downstream. The central axis of the inclined hole 8 has a certain distance from the central axis of the spiral pipe at the position, and the pipe body is in a spiral shape, so that the airflow ejected through the inclined hole 8 generates Circumferential velocity; the angle between the central axis of the...

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Abstract

The invention provides a spiral pipe type air atomizing nozzle. The nozzle adopts a three-time atomization scheme so as to solve the problem of insufficient fuel oil atomization at present. A nozzle body is generally in a contracted cone shape, and the joint of an inner cavity of the nozzle body and a mixing cavity is an internal flow channel throat. A spiral pipe is fixed in the inner cavity, inclined holes are distributed in the pipe wall, and small holes are formed in the tail portion. A fuel pipe is fixed to the upstream of a flow channel, and oil holes in an outlet oil cover of the fuel pipe conduct primary atomization on fuel. Gas enters from the head of the nozzle, part of the gas forms outer ring gas through an axial cyclone, and part of the gas enters the spiral pipe to form innerring gas. According to the spiral pipe type air atomizing nozzle, primary atomization is conducted on fuel through the oil cover, then outer ring rotational flow gas and inner ring gas sprayed out ofthe inclined holes of the spiral pipe are mutually sheared and impacted to conduct secondary atomization, third-time atomization is conducted under the strong shearing effect of outer ring mixed gasand the inner ring gas sprayed out of the small holes of the spiral pipe on the throat, the air atomization effect is effectively enhanced, and pollutant emission is reduced.

Description

technical field [0001] The invention belongs to the field of aviation gas turbine combustion chambers, and in particular relates to a spiral tube type air atomizing nozzle. Background technique [0002] Fuel atomization is mainly achieved by the nozzle, which is an important part in the combustion chamber of an aviation gas turbine, and its performance has a great influence on the combustion process. At present, two types of nozzles with different atomization principles are used inside the combustion chamber: pressure atomization and air atomization. Pressure atomization is to convert pressure potential energy into dynamic potential energy, so that the two phases of gas and liquid can be atomized through strong shearing action; air atomization uses air as the medium, so that it collides with liquid fuel, Squeeze, shear, tear, etc. to break up the liquid fuel. [0003] While constantly pursuing high-efficiency combustion in the combustion chamber, the pressure ratio and tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B7/04B05B7/10
CPCB05B7/0491B05B7/10
Inventor 张群王晓燕王紫欣马晓曦高耀红
Owner NORTHWESTERN POLYTECHNICAL UNIV
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