Nonlinearity of initiating and extinguishing boundaries of DBDs with airflows

Abstract

Various applications of volume dielectric barrier discharges (DBDs) with airflows have attracted significant attention such as in the fields of plasma medicine, surface modification, ozone synthesis, etc. In this work, the nonlinearity characteristics of DBDs in initiating and extinguishing boundaries with airflows are experimentally investigated. It is found that the difference between initiating pulse repetition frequencies (PRFs) and extinguishing PRFs is affected by the addition of airflows. A hysteresis region is produced between these two PRFs. A topological rule of Thom’s classification theorem is proposed to investigate the hysteresis phenomenon of discharges with airflows. It is concluded that the discharge state is dependent on the operation route. The discharge state would transit from initiating to extinguishing, or in the opposite direction, while passing along a specific operation route. Based on the topological method, two nonlinear laws of discharge structure transition under the typical operation routes are predicted and verified in the discharge experiments.

Chaotic Motion Analysis for a Coupled Magnetic-Flow-Mechanical Model of the Rectangular Conductive Thin Plate

“…The study of geometric nonlinear aeroelasticity differs from general aeroelasticity [1] from the theoretical aspects as follows: One is the structural geometric nonlinear theory, which mainly addresses the static and dynamic analysis of the structure under large deformation [2][3][4]; The other is the study of surface aerodynamic theory [5], which mainly addresses the boundary condition dependent deformation state aerodynamic calculation method under large deformation conditions of the structure [6]; The third is the study of the structural/aerodynamic interface coupling method [7,8], which mainly investigates the multidimensional interpolation problem applicable to large deformation in space. The problem of subsonic aeroelasticity of plates focuses on the fluid-structure coupling between the structure and the airflow [9,10].…”

Special issue on selected papers from HVDP 2020

“…They cover the topics of fundamental processes, diagnostics, and applications of discharge plasmas. Interested readers will find the studies devoted to the microwave transmittance characteristics in plasma photonic crystals [1], the connections between burst pulses and the collective movement of charged species for positive corona discharges in atmospheric air [2], the influence of dilution gas composition on the evolution of graphite electrode characteristics in the spark gap switch [3], the multiple current peaks and spatial characteristics of atmospheric helium dielectric barrier discharges with repetitive unipolar narrow pulse 1009-0630/21/060101+02$33.00 excitation [4], reconstruction of energy spectrum of runaway electrons in nanosecond-pulse discharges in atmospheric air [5], the nonlinearity of initiating and extinguishing boundaries of DBDs with airflows [6], the influence of discharge loop parameters on anode side on generation characteristics of metal plasma jet in a pulsed vacuum discharge [7], charge transfer in plasma assisted dry reforming of methane using a nanosecond pulsed packed-bed reactor discharge [8], diagnostics of OH radicals produced in a DC glow discharge by a laser-induced fluorescence system [9], diagnostics of a microhollow cathode discharge at atmospheric pressure [10], the characteristics of an air arc plasma torch and its application in solidwaste disposal [11], the development and characteristics of a battery-operated floating electrode dielectric barrier discharge plasma device [12], the plasma step gradient modification of epoxy resin [13], the enhanced aerosol deposition by bipolar corona discharge arrays [14]. The objective of this special issue is to bring the up-to-date advances presented on HVDP 2020 to readers of Plasma Science and Technology (PST).…”