Scramjet engine based on lightning arc discharge ignition technology

Abstract

The invention discloses a scramjet engine based on a lightning arc discharge ignition technology, and belongs to the technical field of scramjet engines. The engine comprises an engine shell, an air inlet channel head cone, a supersonic combustion chamber, a spray pipe and an oil supply mechanism; the air inlet channel head cone and the inner wall of the engine shell form two air inlet channels which are symmetrical along the axis of the air inlet channel head cone; the supersonic combustion chamber and the spray pipe are sequentially arranged on the engine shell; a plurality of transverse fuel jet flow openings are formed in the circumferential direction of the engine shell at equal intervals; and the oil supply mechanism is connected with the transverse fuel jet flow openings through anoil conveying pipe. A transverse jet flow intensified mixing technology is adopted, and high voltage is applied to a fuel atomizing nozzle, so that atomized fuel with positive charges and negative charges is quickly mixed with air incoming flow of the scramjet engine under the condition that the atomized fuel has a certain penetration depth, ignition is conducted on the basis of the principle thathigh-pressure fuel atomization cloud clusters collide to generate lightning arc discharge, and then the stable ignition and sufficient combustion enhancing effect of the scramjet engine is achieved.

Description

technical field [0001] The invention belongs to the technical field of scramjet, and more specifically relates to a scramjet based on lightning arc discharge ignition technology. Background technique [0002] As a new type of engine, the scramjet engine has the advantages of simple structure, light weight, low cost, high unit thrust and fast speed. It is one of the key technologies for future hypersonic aircraft and rocket engines, and it is accepted by more and more countries. Pay attention to. However, since the scramjet engine operates in a supersonic environment, the residence time of the fuel in the combustion chamber is only on the order of millimeters. It is necessary to complete the mixing of the fuel and the incoming flow, ignite, form a diffusion flame, and spread to the entire combustion chamber in such a short period of time. , It is very difficult to achieve stable and efficient combustion, which is also a key constraint factor for the combustion efficiency of ...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a scramjet based on the lightning arc discharge ignition technology, thereby solving the problem of cavity flow in the prior art scramjet cavity ignition The field structure is complex, and the fuel at the ignition point will be enriched, resulting in technical problems of ignition failure

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