A multi-channel plasma zone ignition combustion device

Abstract

The invention discloses a multichannel plasma area igniting burner. The igniting burner comprises a plasma power supply, a nozzle, an air inlet fish nozzle, a tangential air hole, an air pipe, a hollow insulator, a high-voltage electrode, an insulation piece, a low-voltage electrode, a housing, a swirl chamber, air vents, barrier mediums, a low-speed area, center jet flow and a flame stabilization chamber. Fuel oil is atomized by the use of a splash plate disposed inside the air inlet pipe, mixed gas composed of high-speed rotation air-flow and direct current jet flow is disposed inside the igniting burner, and the two flows cool the igniting burner. The space between the high-voltage electrode and the low-voltage electrode is filled with the inflammable mixed gas flowing at a low speed, so that multi-point discharge and ignition can be carried out in a low-speed mixed gas area inside the igniting burner; and an on-duty high-temperature combustion thermonuclear area and the flame stabilization chamber have ignition source and flame stabilization functions and form a miniature high-speed combustion chamber, so that the combustion chamber can efficiently and reliably ignite and keep flames stable under poor conditions such as high-speed, low-temperature, low-pressure, coal firing and the like.

Description

technical field [0001] The invention relates to the field of aerospace technology and the field of industrial combustion, in particular to a multi-channel plasma region ignition and combustion device. Background technique [0002] Common ignition methods include hot surface, laser-induced spark, spark plug and plasma flow. They all heat the unburned gas mixture to increase its temperature, generate initial free radicals, and then initiate a chain reaction from these initial free radicals. For hot surface ignition, the ignition delay time is longer and the life is relatively short; laser-induced spark ignition requires focused high-energy laser pulses; spark plug ignition is a widely used and relatively reliable ignition method. The above-mentioned ignition methods all have the problem of small ignition area. When the combustion conditions are very bad, such as high-altitude low-pressure ignition, supersonic combustion, lean combustion, etc., the applicability and reliability...

AI Technical Summary

Problems solved by technology

Spark plug ignition and plasma jet both belong to plasma ignition, but the number and area of ​​ions produced are different. The energy waste of the two is relatively serious. The spark plug with small energy consumption only discharges between the high-voltage electrode and the low-voltage electrode with a small gap. If it is inserted into the air mixture, if the flow velocity is high and the pressure and temperature are low, ignition difficulties will occur, and the airflow velocity near the spark plug is closely related to the working state of the engine and cannot be controlled separately, so ignition difficulties are inevitable

[0008] The engine is in high-altitude, high-speed, low-pressure, and low-temperature flight conditions, and the working conditions of the combustion chamber are very harsh, which is prone to problems such as difficulty in low-pressure ignition, poor combustion stability, and reduced combustion efficiency.

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