A Scramjet Engine Based on Lightning Arc Discharge Ignition Technology

Abstract

The invention discloses a scramjet engine based on lightning arc discharge ignition technology, which belongs to the technical field of scramjet engine, and comprises an engine casing, an inlet cone, a supersonic combustion chamber, a nozzle and a fuel supply mechanism; an air inlet The nose cone and the inner wall of the engine casing form two symmetrical air inlets along its axis; the supersonic combustion chamber and the nozzle are sequentially arranged on the engine casing; multiple transverse fuel jet ports are equidistantly arranged along the circumference of the engine casing; The mechanism is connected with the horizontal fuel injection port through the oil delivery pipe. The invention adopts the technology of cross-jet intensified mixing and applies high voltage to the fuel atomizing nozzle, so that the atomized fuel with positive charge and negative charge, respectively, has a certain penetration depth and flows quickly with the scramjet air. It is mixed and ignited based on the principle of lightning arc discharge generated by the collision of high-pressure fuel atomized clouds, so as to realize the stable ignition and full combustion enhancement effect of the scramjet.

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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