Experimental device and method for obtaining annular uniform plasmas in barometric pressure air

Abstract

The invention relates to an experimental device and method for obtaining annular uniform plasma in atmospheric pressure air, belonging to the technical field of plasma. The tubular ground electrode (3) is tightly wrapped around the quartz dielectric tube (2), pasted and fixed, and grounded firmly through the wire; the tubular high-voltage electrode (1) is inserted into the quartz dielectric tube (2), and the tubular high-voltage electrode (1 ) is at the position slightly below the bottom of the ground electrode (3), and the tubular high-voltage electrode (1) is connected to the bipolar nanosecond pulse power supply (4) through a wire; the tubular high-voltage electrode (1) and the tubular ground electrode (3) An annular discharge area is formed between them. The discharge plasma is excited by a bipolar nanosecond pulse power supply (4), and an electrical diagnosis system, an optical diagnosis system, and an image acquisition system are used to perform real-time characteristic diagnosis on the generated annular surface plasma.

Description

technical field [0001] The invention belongs to the field of plasma technology. In particular, it relates to a low-temperature plasma technology that is driven by a bipolar nanosecond pulse power supply and uses a ring-shaped tubular electrode structure to obtain a uniform ring-shaped dielectric barrier surface discharge in atmospheric pressure air. Background technique [0002] Surface discharge, especially surface dielectric barrier discharge, has a wide range of applications, such as air flow controllers, ozone generators, surface treatment, and pollutant treatment. Generally speaking, the surface dielectric barrier discharge has a flat plate "sandwich" structure, that is, a dielectric plate is sandwiched between two electrodes, and there is no discharge gap. However, the plasma generated by this planar discharge structure usually covers the surface of the dielectric plate without a fixed boundary, and it is difficult to confine the generated plasma within a certain spac...

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Problems solved by technology

[0005] In order to solve the traditional problem of uneven surface discharge, uncertain plasma boundary, and low energy utilization rate, the present invention provides an experimental device for obtaining annular uniform plasma in atmospheric pressure air, which mainly consists of annular electrodes, bipolar nanosecond pulses Power supply, electrical diagnostic system, optical diagnostic system, and image acquisition system

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