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Method for generating large-volume uniform plasma in air flow or nitrogen flow

A plasma, large-volume technology, applied in the field of plasma, can solve problems such as easy to be blown out, and achieve the effect of easy cutting, cost reduction and expensive cost reduction

Inactive Publication Date: 2021-12-10
DALIAN UNIV OF TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the current limitation that the uniform discharge of atmospheric pressure air and nitrogen can only be produced in a partial discharge area or a small gap, and the shortcoming that the discharge is easily blown out in the air flow environment, the present invention provides a Method for generating large volume uniform plasma

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  • Method for generating large-volume uniform plasma in air flow or nitrogen flow
  • Method for generating large-volume uniform plasma in air flow or nitrogen flow
  • Method for generating large-volume uniform plasma in air flow or nitrogen flow

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] A method for generating a large-volume uniform plasma in an air flow or a nitrogen flow, capable of generating a large-volume uniform plasma at a gap of 1-10mm. Plasma generation systems such as figure 1 As shown, it includes nanosecond pulse power supply, air duct system and dielectric barrier discharge plate electrode unit. The air duct system consists of a single-stage impeller scroll air pump (for air discharge) or a nitrogen bottle (for nitrogen discharge), air duct and Laval nozzle; the air flow is generated by a single-stage impeller scroll air pump, and the nitrogen flow passes through the air Provided by the bottle; the airflow flows through the air duct and the Laval nozzle into the discharge gap; the airflow speed can be adjusted by the ball valve at the front end of the Laval nozzle, the adjustment range of the air flow is 0-240m / s, and th...

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Abstract

The invention belongs to the technical field of atmospheric pressure low-temperature plasma application, and relates to a method for generating large-volume uniform plasma in air flow or nitrogen flow. According to the discharge mode adopted by the invention, the airflow is introduced into the discharge space in parallel, and uniform discharge is generated and maintained through the redistribution effect of the airflow on heat and particles in the discharge space. The discharge mode adopted by the invention is combined with the required discharge gap and airflow velocity to dynamically adjust discharge parameters, and large-volume uniform plasma can be realized under the required working condition. The method has beneficial technical effects in related application fields, and is beneficial for improving the processing uniformity and efficiency.

Description

technical field [0001] The invention belongs to the technical field of low-temperature plasma at atmospheric pressure, and relates to a method for generating large-volume uniform plasma in an air flow or a nitrogen flow. Background technique [0002] Dielectric barrier discharge is an economical and reliable way to generate low-temperature plasma at atmospheric pressure. By inserting an insulating medium between the discharge electrodes, the conversion of discharge to arc discharge can be suppressed, thereby avoiding ablation of electrode materials and damage to processed materials. Because it does not require a vacuum system, can work directly under atmospheric pressure, and has a flexible and simple device structure, it has a wide range of applications and can be used in many fields such as flow control, material processing, ozone generation, and waste gas treatment. But in atmospheric air and nitrogen dielectric barrier discharges, the discharge is usually in a filamenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H1/24
CPCH05H1/2406
Inventor 王玉英闫慧杰李婷
Owner DALIAN UNIV OF TECH
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