A direct-firing fan-shaped nozzle applied to the concave cavity structure of an afterburner
A technology of afterburner and fan-shaped nozzle, applied in the direction of combustion chamber, continuous combustion chamber, combustion method, etc., can solve the problems of poor fuel atomization effect, fuel accumulation and dripping at the outlet, etc., to achieve easy ignition, sufficient combustion, increase The effect of fogging properties
Active Publication Date: 2021-10-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Aiming at the deficiencies of the direct jet nozzle and the fan nozzle in the afterburner existing in the prior art, the present invention proposes a new direct jet fan nozzle applied to the cavity structure of the afterburner, which combines the atomization of the fan nozzle The advantage of both the effect and the simple processing of the direct-injection nozzle, by setting up a plurality of direct-injection nozzle holes on the side of the fuel injection rod, the fan-shaped oil mist arc surface formed by the nozzle holes of the present invention solves the problem of fuel accumulation and dripping at the outlet existing in the prior art , the technical defect of the downstream fuel atomization effect is poor
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] In order to make the purpose and effect of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be pointed out that the specific implementations described here are only used to explain the present invention, not to limit the present invention.
[0030] Such as figure 1 Shown is a structural diagram of a turbofan aero-engine that adopts a direct-injection fan nozzle and a concave cavity structure afterburner of the present invention. A fan 1 and a compressor 2 are sequentially arranged along the direction of air flow 100, that is, the central axis 500 of the gas turbine, and the air flows into the combustion chamber 3 after passing through the compressor; A blender 5 is arranged between the side walls of the afterburner chamber 15 , and a diffuser section 6 is formed between the blender 5 and the support plate 7 .
[0031] The structure after the turbine 4 belongs to the af...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a direct-injected fan-shaped nozzle applied to the concave cavity structure of an afterburner, and relates to a direct-injected fan-shaped nozzle installed in the concave cavity of an afterburner for enhancing flame stability performance and cross-flame performance. It belongs to the field of aero-engines. In the present invention, a plurality of direct injection holes in a certain arrangement shape are provided at the bottom of the fuel injection rod to inject fuel into the concave cavity structure in the afterburner. Torus shape, the fan-shaped oil mist surfaces of two adjacent fuel injection rods intersect, forming an oil mist ring concentric with the casing in the concave cavity structure, which strengthens the fuel atomization effect, enhances the performance of circumferential cross-flame, and improves combustion efficiency. The invented straight-injected fan-shaped nozzle is less difficult to process, has higher machining accuracy, and has a smaller nozzle hole diameter, so the fuel atomization effect is better, and the overall performance of the afterburner is greatly improved.
Description
technical field [0001] The invention belongs to the field of fuel atomization of aero-engines, and relates to a direct-shooting fan nozzle with simple structure and convenient processing, which is installed in the cavity of an afterburner chamber and enhances the ability to stabilize fire and cross-flame. Direct fan nozzle with concave cavity structure. Background technique [0002] The invention of the nozzle structure is to turn a certain liquid into a droplet atomization structure. According to the atomization mechanism, it can be divided into pressure atomization and air atomization nozzles; according to the spray form, it can be divided into direct nozzles, cone nozzles, and fan nozzles. In the field of aero-engines, in order to organize the high-efficiency combustion of aviation kerosene in a small space and a short time, a centrifugal nozzle (belonging to the pressure atomization nozzle) is usually used to couple the air swirler to form a fuel-air mixture in the main...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F23R3/28
CPCF23R3/28
Inventor 李伟颜应文邸东李井华刘勇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS