Electrical studies and plasma characterization of an atmospheric pressure plasma jet operated at low frequency

Abstract

Low-temperature, high-pressure plasma jets have an extensive use in medical and biological applications. Much work has been devoted to study these applications while comparatively fewer studies appear to be directed to the discharge itself. In this work, in order to better understand the kind of electrical discharge and the plasma states existing in those devices, a study of the electrical characteristics of a typical plasma jet, operated at atmospheric pressure, using either air or argon, is reported. It is found that the experimentally determined electrical characteristics are consistent with the model of a thermal arc discharge, with a highly collisional cathode sheet. The only exception is the case of argon at the smallest electrode separation studied, around 1 mm in which case the discharge is better modeled as either a non-thermal arc or a high-pressure glow. Also, variations of the electrical behavior at different gas flow rates are interpreted, consistently with the arc model, in terms of the development of fluid turbulence in the external jet. V C 2013 AIP Publishing LLC.

A review on plasma combustion of fuel in internal combustion engines

“…Their study also demonstrated that the vibrational temperature can effectively be used to explain the electron and ionization energy mechanism of DBD plasma. 41 Results have shown that airflow has significant influence on the length and brightness of plasma. Nanosecond-DBD plasma has been characterized by using simultaneous current-voltage measurement and Schlieren imaging according to Dawson and Little.…”

“…45 Voltage amplitude and gas flow rate method has also been applied to characterize plasma jet. 41 Results have shown that airflow has significant influence on the length and brightness of plasma. The increase in voltage led to a corresponding decrease in current and vice versa.…”

“…Nanosecond-DBD plasma has been characterized by using simultaneous current-voltage measurement and Schlieren imaging according to Dawson and Little. Other model that have been found to be effective in the characterization of different types of plasma include Laframboise theory for superconducting proton linear accelerator Plasma, 44 Elenbaas-Heller equation (thermal arc model) for plasma jet, 41 and finite difference method couple with classical computing algorithm, and Jacobi matrix for three-liquid plasma. They also demonstrated that the DBD thickness has no significant effect on the plasma characteristics.…”

Modeling of Streamer Dynamics in Atmospheric‐Pressure Air Plasma Jets

“…However, because of high cost of inert gases, it is of interest to consider possibility to work with much cheaper feed gases. Recently, several plasma jet experiments using air or nitrogen flows have been performed . It has been shown that air and nitrogen APPJs can be driven, depending on experimental conditions, by convective transport, with the gas flow, of plasma formed inside the tubes, or, like in helium and argon APPJs, by guided streamers …”

“…Recently, several plasma jet experiments using air or nitrogen flows have been performed. [10][11][12][13][14][15][16][17][18][19][20][21][22] It has been shown that air and nitrogen APPJs can be driven, depending on experimental conditions, by convective transport, with the gas flow, of plasma formed inside the tubes, [14,15] or, like in helium and argon APPJs, by guided streamers. [13,20] The specific feature of APPJs feeded with molecular gases is substantial gas heating by discharges inside the tubes.…”