Ignition system for afterburner

Abstract

The invention relates to the technical field of ignition systems for turbojet engines, in particular to an ignition system for an afterburner, and solves the problems that ignition systems and oil waysystems of the afterburners of small and medium-sized turbojet engines are complex and the engine thrust-weight ratio is insufficient in the prior art. The ignition system comprises an ignition oil way system, wherein the ignition oil way system comprises an oil pump; the oil pump is respectively connected to an ignition device and an afterburner fuel manifold through a pipeline; the ignition device comprises a shell; an electric heating plug is arranged in the shell; a cable is arranged above the electric heating plug; an afterburner ignition oil pipe is arranged on the shell and is connected to the pipeline; a fuel circuit is formed by a circular seam between the electric heating plug and the inner wall of the shell; and the fuel circuit communicates with the afterburner ignition oil pipe. According to the ignition system, only two oil ways are arranged, the design of the oil way system is simpler, and the engine thrust-weight ratio can be improved by improving the ignition device and the oil way system.

Description

technical field [0001] The invention relates to the technical field of turbojet engine ignition systems, in particular to an ignition system for a small turbojet engine with afterburner, and more particularly to an afterburner ignition system. Background technique [0002] The engine is a highly complex and precise thermodynamic machine. A high-performance engine should have a relatively wide afterburner ignition range and a relatively fast ability to turn on the afterburner, which puts higher requirements on the ignition performance of the afterburner. The hot jet ignition method is commonly used abroad. [0003] Such as figure 1 As shown, the thermal jet ignition system in the prior art includes an oil circuit, an oil pump, a jet nozzle, a relay nozzle, and an afterburner fuel manifold. , relay nozzle, fuel main pipe connection. Among them, the jet nozzle (generally a direct injection nozzle) is installed in the middle and rear section of the main combustion chamber, an...

AI Technical Summary

Problems solved by technology

[0005] Based on the above problems, the object of the present invention is to provide an afterburner ignition system, which is used to solve the problems in the prior art that the ignition system and oil circuit system of the afterburner of small and medium-sized turbojet engines are complicated, and the thrust-to-weight ratio of the engine is insufficient.

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