A Plasma-Based Orbital Sliding Arc Actuator

Abstract

The invention discloses a rail type sliding arc exciter based on plasma. The rail type sliding arc exciter based on the plasma comprises an exciter body and electrodes, wherein the number of the electrodes is at least two, and the electrodes are used for generating electric arcs; the exciter body comprises a first contact, a rotational flow section and a second connect, wherein the shape of the first contact and the shape of the second contact both are cylindrical, the shape of the rotational flow section is in a circular truncated cone shape, the first connect, the second connect and the rotational flow section are of an integrated forming structure, the axes of the first connect, the second connect and the rotational flow section are positioned on the same straight line, the small end ofthe rotational flow section is arranged at one end of the first connect, and the large end of the rotational flow section is arranged at one end of the second connect. According to the rail type sliding arc exciter, the structure is simple, the plasma is used for reinforcing combustion, the ignition boundary of an engine is expanded, the ignition success rate and the combustion efficiency of theengine are improved, and the rail type sliding arc exciter can be popularized and used.

Description

technical field [0001] The invention relates to the technical field of aerodynamic plasma ignition and combustion enhancement, in particular to a plasma-based orbital sliding arc exciter. Background technique [0002] With the continuous development and progress of aviation equipment, higher requirements are placed on the performance of the engine. At present, the aero-turbine engines used on aircraft basically use the head of the combustion chamber with a swirler, and at the same time use electric sparks for ignition. Insert the spark plug in the appropriate place in the low pressure recirculation area to ignite. This ignition method has many disadvantages: first, the ignition energy of the spark plug is relatively small, and the air pressure, oil-gas ratio, oxygen content and other conditions required for ignition are relatively harsh, which directly limits the ignition range of the engine and affects the performance of the engine; Ignition completely relies on the low-p...

AI Technical Summary

Problems solved by technology

[0005] For example, the transient plasma igniter disclosed in the Chinese utility model patent application number 201320339282.9 for the combustion chamber of an internal combustion engine, and the air swirl plasma igniter disclosed in the Chinese invention patent application number 201310084697.0, Both of these igniters adopt the idea of ​​plasma ignition, which improves the ignition characteristics to a certain extent, but still faces the problems of complex discharge structure and limited discharge area.

[0006] In addition, as disclosed in the Chinese invention patent application document with the application number 201711344497.9, the rotary sliding arc plasma fuel cracking head of the aero-engine combustor, this scheme is to set the discharge area of ​​the fuel cracking head in the small Venturi of the inner channel between the large venturi tube and the outer channel, but the plasma sliding arc has more contact with the air in the outer channel, and the contact time with the atomized fuel is shorter, which fails to maximize the cracking effect of the sliding arc plasma on the fuel

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