Periodic alternating current drive low-temperature plasma ignition method and system

Abstract

The invention discloses a periodic alternating current drive low-temperature plasma ignition method and a periodic alternating current drive low-temperature plasma ignition device, an relates to the technical field of aerospace engine ignition, combustion and propulsion. The method comprises the following steps of: arranging an ignitor at a proper position of a combustion chamber, wherein a high voltage electrode and a low voltage electrode of the ignitor are connected with a high voltage end and a low voltage end of a low-temperature plasma power source, and a frequency controller is connected with the low-temperature plasma power source; triggering the low-temperature plasma power source and a frequency controller switch and adjusting power output parameters; adjusting control discharge frequency of the frequency controller and discharge time of each period; and providing a trigger signal to the low-temperature plasma power source by the frequency controller, discharging by the power source, and discharging to ignite according to certain frequency by the ignitor. The invention also discloses the corresponding periodic alternating current drive low-temperature plasma ignition device. The method and the device have the advantages of large-size ignition, capabilities of shortening ignition delay time, realizing high-efficiency reliable ignition in the aspects of high-altitude low-voltage supersonic speed combustion, lean burn and the like and improving the performance of an engine, industrial energy conservation and emission reduction.

Description

technical field [0001] The invention relates to the technical field of ignition and combustion propulsion of aerospace engines, in particular to a method and system for periodically AC-driven low-temperature plasma ignition. Background technique [0002] With the development of the arms race, aircraft powered by aero-engines and ramjet engines are gradually moving towards adjacent space, with the purpose of improving the anti-reconnaissance and anti-interception capabilities of aircraft. Engines flying at high altitude, high speed, low pressure, and low temperature have very bad working conditions in the combustion chamber, which is prone to problems such as difficulty in low-pressure ignition, poor combustion stability, and reduced combustion efficiency. In order to improve the reliability of engine ignition and broaden the stable working range, a reliable ignition method is very important, so it is urgent to develop a new high-efficiency ignition technology. [0003] Comm...

AI Technical Summary

Problems solved by technology

[0012] The existing AC-driven low-temperature plasma power supplies manually adjust the voltage step by step, implement discharge, and generate low-temperature plasma. Therefore, the existing power supply equipment and usage methods cannot meet the ignition requirements of aeroengines, especially PDE ignition. Detonation and test DDT process requirements, which limit the use of low-temperature plasma for ignition and application prospects

Images