Application of High Voltage Power Supply in Plasma Jet
As we all know, the application of jet flow is not only liquid, but also gas. This paper mainly discusses the application of jet plasma generation under atmospheric pressure air environment. Gas jet, also known as gas turbulent jet, when the fluid is injected into a static environment, there is a discontinuity surface with different speeds between it and the surrounding static fluid. The surrounding fluid is sucked into the jet, and at the same time, it is constantly moving, deforming, and splitting to generate turbulence, and its influence gradually develops to the inner and outer sides to form a freely turbulent mixed layer. At present, because the atmospheric pressure non-equilibrium plasma jet device can generate plasma in an open space, instead of only in the discharge gap of the traditional discharge, this remarkable feature is very useful for many applications, especially in the plasma medicine that has emerged in recent years. application is particularly prominent.
For low-pressure discharge, due to the low density of the gas, the collision frequency between electrons and neutral particles is relatively low, so electrons are easier to obtain higher energy under the action of an electric field. This makes ionization easier to occur, resulting in easier access to higher density plasma under low pressure conditions, which makes low pressure non-equilibrium plasma widely used in industry, such as plasma etching, material surface modification properties and cleaning, improving the biocompatibility of materials, generating nanomaterials, etc. In addition, it is relatively easy to generate a uniform plasma at low pressure, which is crucial for many applications such as surface modification, etching, etc.
The propagation mechanism of physical properties of non-equilibrium plasma jets under atmospheric pressure can be divided into electric field-driven plasma jets and fluid-driven plasma jets. In addition to the reasonable arrangement of metal electrodes in the generated device, a stable and reliable high-voltage power supply is a very important link, which directly affects the plasma generation effect.
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