Influence of nitrogen impurities on the performance of multiple-current-pulse behavior in a homogeneous helium dielectric-barrier discharge at atmospheric pressure

Abstract

Detailed corrections are given as follows.1. On page 3, the term describing the power input from the electric field in equation ( 2) should read E•Γ e instead of E•Γ ε . The corrected equation is given below:2. On page 3, the sentence 'A non-linear solver PARDISO [52,53] is employed to…' should be corrected to 'A direct solver PARDISO [52,53] is employed to…'. 3. In figure 2, the correct unit of 'Time' should be 'μs' instead of 'ms'. 4. In figures 6, 8 and 9, the correct unit of 'Average reaction rate' should be 'mol 9 should be revised to: 'figure 9. The caption of figureTemporal variations of (a), (c) and (e) space-averaged electron production rates, (b), (d) and (f) space-averaged charged particle densities over one normalized applied voltage period under three different N 2 levels. The applied voltage amplitude (V am ), driving frequency (f ) and gap width (d g ) are fixed at 1.5 kV, 10 kHz and 1 mm, respectively'.

A Practical Method for Controlling the Asymmetric Mode of Atmospheric Dielectric Barrier Discharges

“…The width of the gas gap d g is fixed to 4.4 mm and the dielectric layer thickness d b is 1 mm. Note that the gap width is not very large (<5 mm) and much shorter compared with the radius of electrodes (≈56.4 mm) [20]; in this case, the radially homogeneous assumption should be reasonable and accepted. On this basis, a one-dimensional fluid model is appropriate to simulate the discharge process, which has also been successfully applied to investigate the nonlinear phenomena in [6,21,22].…”

Influence of Oxygen on the Multiple-Current-Pulse Behavior in an Atmospheric Homogeneous Helium Dielectric Barrier Discharge With Air Impurities

“…It should be noticed that, in practical applications of atmospheric helium HDBDs, air impurities are always unavoidable. Based on the previous studies, it has been well known that in some conditions even a low concentration of air impurities in the atmospheric helium HDBDs would have a significant impact on the discharge characteristics [15], [16], [22], [23]. For example, Golubovskii et al proposed that the symmetry of the discharge current could be affected by N 2 impurities in the case of helium HDBDs [14].…”

“…Besides, the Penning ionization would be enhanced and would further promote the occurrence of multiple breakdowns. In our previous work [23], to simplify our simulation model, we only consider the effect of nitrogen impurity on the MCP behavior of atmospheric helium HDBDs. Then, a question arises whether, in the study of MCP behaviors, the oxygen in air impurities will remarkably affect the discharge characteristics and its ignorance will lead to quantitatively or qualitatively unacceptable results.…”

“…Although several publications have considered the air impurities when performing the simulation works [29]- [32], the detailed evolution mechanism regarding the influence of O 2 in air impurities on the MCP discharge characteristics, such as the dominant effect between N 2 and O 2 , or the difference of considering O 2 compared with previous evolution mechanism only with N 2 impurity [23], have not been investigated yet. Thus, the aim of this paper is to purposely study the influence of oxygen on the MCP behavior in an atmospheric helium HDBD with air impurities (79% N 2 and 21% O 2 ).…”

“…Thus, the aim of this paper is to purposely study the influence of oxygen on the MCP behavior in an atmospheric helium HDBD with air impurities (79% N 2 and 21% O 2 ). This study can be considered as a follow-up of our previous work [23] which is only focused on the influence of nitrogen and completely neglects the oxygen. In this study, the oxygen will be included into the chemical reactions of atmospheric helium HDBDs with trace of air impurities, and the evolution of MCP discharges, as well as the underlying mechanism, would be more complicated due to the combined effects of helium, nitrogen, and oxygen.…”