A Numerical Simulation Model of Gas-solid Two-Phase Flow Mixed Dielectric Discharge

What is it about?

The gas-solid two-phase flow mixed dielectric discharge has important theoretical and practical value for the external insulation protection of power systems under extreme conditions such as wind-sand, and the application of discharge plasma technology in various fields. In this work, based on Townsend’s discharge theory, a novel theoretical physical model of gas-solid two-phase flow mixed dielectric discharge for a short air gap in a uniform field is presented for the first time. This model extends the classical Townsend’s theory to be applicable to the quantitative analysis of dielectric discharge questions related to gas-solid two-phase flow environment, reveals the influence mechanism of flowing gases and solid-phase particles on discharge, and provides a theoretical basis for expanding the application of discharge plasma technology in various fields.

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Photo by Jeremy Thomas on Unsplash

Photo by Jeremy Thomas on Unsplash

Why is it important?

The theoretical and experimental studies on the physical properties and basic laws of the gas-solid two-phase flow discharge phenomenon are not only helpful for the protection and design of high-voltage external insulation systems under extreme weather conditions, such as strong wind-sand and the understanding of natural phenomena such as wind-sand electrification, but also have important application value in various areas such as pollutant removal, organic waste gas treatment, ozone preparation and material synthesis. At present, a theoretical analysis model applicable to quantitatively describe the comprehensive influence factors and discharge mechanism of the gas-solid two-phase flow mixed dielectric has not been obtained, and the dielectric breakdown voltage cannot be quantitatively calculated and effectively predicted. Therefore, it is necessary to consider the influence of gas flow and solid-phase particles on the basic physical process of discharge in a gas-solid two-phase flow mixed dielectric, and present a theoretical model for the discharge in a gas-solid two-phase flow mixed dielectric to quantitatively describe and calculate the questions related to the discharge of gas-solid two-phase flow.

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