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A cross-fire device that organizes combustion and conducts the flame to the ducted airflow

A technology for organizing combustion and external ducts, applied in combustion chambers, combustion methods, combustion equipment, etc., can solve the problem of not solving the problem of introducing internal flames into external ducts with fresh air, increasing the blockage area and weight, and improving work efficiency. Efficiency, the effect of making full use of space

Active Publication Date: 2016-01-20
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution solves the combustion problem of the inner airflow, but does not solve how to introduce the inner flame into the outer duct with fresh air

Method used

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  • A cross-fire device that organizes combustion and conducts the flame to the ducted airflow
  • A cross-fire device that organizes combustion and conducts the flame to the ducted airflow
  • A cross-fire device that organizes combustion and conducts the flame to the ducted airflow

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Embodiment 1

[0028] According to an embodiment of the present invention, afterburner (such as figure 1 As shown), remove the device behind the turbine rear support plate 4 and the splitter ring 5, and transform the splitter ring (such as figure 2 shown). The turbine rear strut 4 in the traditional afterburner is used as a flame stabilizer in the connotation channel, and its modification method is detailed in the strut flame stabilizing device with concave cavity and the flame stabilizing method, patent number: 201010135627.X, and The Co-Flame device replaces the original splitter ring, and while maintaining the original layout, it is only 3 to 5 mm thicker than the original layout.

[0029] image 3 Schematically shows the cross-fire device, the direction of air flow and the swirl distribution for flame stabilization in the afterburner of an aero-engine. The internal channel airflow is mixed with the fuel oil through the fuel injection hole of the support plate, and forms a vortex at t...

Embodiment 2

[0032] According to another embodiment of the present invention, the cross-fire device (such as figure 2 Shown) further modified to achieve better results. Add a fuel injection rod in the inner cavity to make it spray fuel upwards, and open a hole on the upper plate of the cross-fire device. In this way, the outer duct is filled and supplied with oil, so that the combustion of the outer duct is more complete, more heat energy is provided, and greater thrust is generated.

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PUM

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Abstract

The invention provides a flame crossover device capable of achieving organization combustion and transferring flames to outer duct airflow. The flame crossover device improves an original afterburning chamber shunt ring, a cavity is arranged on the original afterburning chamber shunt ring, air can be led from an inner duct and an outer duct, and an oil spaying rod is arranged in the cavity. A sudden-expansion structure is arranged on the tail portion of the flame crossover device, the airflow is made to form a vertex at the tail portion of the device, and an oil and gas mixture sprayed out from the gap of the tail portion of the cavity is entrained for combustion. Meanwhile, a small lobe structure at the tail portion of the cavity can transfer the stable flames at the position to an outer duct main flow, and finally the entire afterburning chamber is full of flames. According to the flame crossover device, under the premises that the position is limited, and the flow resistance and the entire weight are not obviously increased, organization combustion can be achieved, the flames are transferred to the outer duct airflow, so that the working performance of the afterburning chamber and the pushing force of an engine are improved, and meanwhile the advantages of being simple in structure and easy to maintain are achieved.

Description

technical field [0001] The invention relates to the technical field of the afterburner, in particular to a cross-flame device for the afterburner of a turbofan engine, which can introduce the flame in the inner duct of the turbofan engine into the outer duct and prevent its combustion. Background technique [0002] In order to improve the combat performance of the aircraft and expand the flight envelope, the power plant of military fighter jets usually increases the thrust through afterburner. Since the gas behind the turbine also contains oxygen, the gas is re-combusted by injecting oil into it, so that the temperature of the airflow is greatly increased, and the thrust can be increased within a certain period of time. The traditional afterburner structure consists of a mixer, a diffuser, a fuel nozzle, and a flame stabilizer. The internal and external airflows are mixed through the mixer, diffused and decelerated in the diffuser, and then mixed with the fuel injected from...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23R3/16
Inventor 刘玉英谢奕季鹤鸣金捷刘邓欢
Owner BEIHANG UNIV