Igniting device of liquid ramjet motor capable of stabilizing the flame at the end of ignitor

Abstract

The invention discloses an igniting device of liquid ramjet motor capable of stabilizing the flame at the end of ignitor, comprising an ignitor, an oil supplying channel, a gas supplying channel, a front housing, a middle housing, a connection ring, a back housing, a fastening plug, an expanding tube and a flame stabilizer, wherein the front housing is fixedly connected with middle housing. Middle housing and back housing are fixedly connected with connection ring. The ignitor is provided at the connection between middle housing and back housing.The segmented design of housing is convenient for the ignitor to be installed. One end of fixing plug is captured between connection ring and middle housing and the other end of fixing plug is captured in ignitor for fixing ignitor. Oil supplying channel and gas supplying channel separately extend beyond the outer wall of middle housing and protrude into housing and is fixedly connected with ignitor. Expanding tube is fixedly connected with ignitor and flame stabilizer is connected with back housing. The design can ensure that pioneer torch which is not easy to go out forms at the end of ignitor under high speed airflow. The torch is used to ignite gas-oil mixture in main combustion chamber and make motor work normally.

Description

technical field [0001] The invention belongs to the technical field of ramjet engines, and in particular relates to an ignition device for a liquid ramjet engine capable of stabilizing the flame at the end of an igniter. Background technique [0002] A ramjet is an aeroengine with a simple structure, and its structure is generally composed of an air inlet, an ignition device, a combustion chamber, a flame stabilizer, and a nozzle. Due to the advantages of light weight and low cost, the ramjet engine is widely used as the power device for the cruising stage of the aircraft. Ignition device is an essential part set in the combustion chamber of liquid fuel ramjet engine for reliable ignition and stable combustion. [0003] As far as the widely used spark plug igniter is concerned, its advantages are: simple equipment and high frequency; its disadvantages are: low ignition energy, only suitable for igniting gaseous fuel or atomized liquid fuel, low temperature of oil-gas mixtur...

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Problems solved by technology

[0003] As far as the widely used spark plug igniter is concerned, its advantages are: simple equipment and high frequency; its disadvantages are: low ignition energy, only suitable for igniting gaseous fuel or atomized liquid fuel, low temperature of oil-gas mixture, The ignition area is small, and when there are pollutants between the electrodes, it is easy to cause ignition failure. When the gas flow rate is too high, it is difficult to ignite or it is easy to extinguish

[0004] Li Qing, Pan Yu, Tan Jianguo, etc. published in the "Comparative Analysis of the Performance of Flame Stabilizers with V-groove and V-grooves in Subcombustible Ramjet Engines [J]" (Journal of Aerodynamics, 2010, 25(01):35-40.) A liquid ramjet ignition device that can stabilize the flame at the end of the igniter is developed. Its working principle is to use the spark plug to ignite the mixed gas of hydrogen and oxygen, and then use the gas flame to ignite the mixed fuel of oil and gas. The ignition success rate has been improved, but it needs another Adding a hydrogen supply device greatly increases the complexity of the structure

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