A long-distance high-energy plasma igniter with jet arc ignition

Abstract

A jet arc ignition type long-distance high-energy plasma igniter, which is composed of an anode 109, an inner layer insulator 108, an intermediate arc ignition electrode 107, an outer layer insulator 106, and a cathode 105; these parts are nested and installed from inside to outside in sequence : the anode 109 is embedded in the inner insulating member 108 as a whole and embedded in the middle arc electrode 107; these three parts are embedded in the inner insulating member 106 as a whole, and the above four parts are embedded in the cathode 105 to form the overall structure of the igniter. The plasma jet propagates outward through the designed jet holes, and finally contacts with the external cathode, so that the air between the external cathode 105 and the anode 107 breaks down and conducts, forming a large-space discharge, thereby increasing the discharge distance and improving energy utilization, which can solve the problem of At present, the electric spark igniter has the problems of small spacing and low efficiency, and cannot meet the demand for large energy discharge.

Description

technical field [0001] The invention relates to plasma technology, in particular to a high-efficiency and high-energy plasma igniter that utilizes synthetic jets to strike arcs so as to realize long-distance discharge. Background technique [0002] Spark plug nozzles based on spark discharge are widely used in aero-engines, gas turbines, and scramjets. Electrode spacing is a key parameter in designing spark plug nozzles. If the distance is too large, a higher breakdown voltage is required, which will affect the reliability of the ignition system; if the distance is too small, the discharge efficiency will be reduced and the ignition performance of the ignition system will be affected. [0003] At present, 0.8-1.2mm is generally used as the electrode spacing in the industry. At this time, the single storage energy of the ignition system is usually not more than 20J, and the typical discharge efficiency is 10% to 30%. For a scramjet, the high flow velocity and the high turb...

AI Technical Summary

Problems solved by technology

[0005] In view of this, in order to solve the outstanding problem of low efficiency caused by the too small distance between the spark plug and nozzle electrodes in the case of high energy, the present invention proposes a high-energy plasma igniter that uses synthetic jets to achieve arc ignition and increases the distance between discharge electrodes

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