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Journal articles on the topic 'DBD nanoseconde'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Zhao, Zi-Jie, Y. D. Cui, Jiun-Ming Li, Jian-Guo Zheng, and B. C. Khoo. "On the boundary flow using pulsed nanosecond DBD plasma actuators." Modern Physics Letters B 32, no. 12n13 (May 10, 2018): 1840035. http://dx.doi.org/10.1142/s0217984918400353.

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Our previous studies in quiescent air environment [Z. J. Zhao et al., AIAA J. 53(5) (2015) 1336; J. G. Zheng et al., Phys. Fluids 26(3) (2014) 036102] reveal experimentally and numerically that the shock wave generated by the nanosecond pulsed plasma is fundamentally a microblast wave. The shock-induced burst perturbations (overpressure and induced velocity) are found to be restricted to a very narrow region (about 1 mm) behind the shock front and last only for a few microseconds. These results indicate that the pulsed nanosecond dielectric barrier discharge (DBD) plasma actuator has stronger local effects in time and spatial domain. In this paper, we further investigate the effects of pulsed plasma on the boundary layer flow over a flat plate. The present investigation reveals that the nanosecond pulsed plasma actuator generates intense perturbations and tends to promote the laminar boundary over a flat plate to turbulent flow. The heat effect after the pulsed plasma discharge was observed in the external flow, lasting a few milliseconds for a single pulse and reaching a quasi-stable state for multi-pulses.

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2

Liu, Chong, Alexander Fridman, and Danil Dobrynin. "Uniformity analysis of nanosecond and sub-nanosecond pulsed DBD in atmospheric air." Plasma Research Express 1, no. 1 (November 28, 2018): 015007. http://dx.doi.org/10.1088/2516-1067/aaf067.

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3

Rai, S. K., A. K. Dhakar, and U. N. Pal. "A compact nanosecond pulse generator for DBD tube characterization." Review of Scientific Instruments 89, no. 3 (March 2018): 033505. http://dx.doi.org/10.1063/1.5017564.

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4

Rethmel, Chris, Jesse Little, Keisuke Takashima, Aniruddha Sinha, Igor Adamovich, and Mo Samimy. "Flow Separation Control Using Nanosecond Pulse Driven DBD Plasma Actuators." International Journal of Flow Control 3, no. 4 (December 2011): 213–32. http://dx.doi.org/10.1260/1756-8250.3.4.213.

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5

Fan, Yangyang, Jiushan Cheng, and Qiang Chen. "Degradation of metronidazole simulated water by nanosecond pulsed DBD plasma." IOP Conference Series: Earth and Environmental Science 687, no. 1 (March 1, 2021): 012074. http://dx.doi.org/10.1088/1755-1315/687/1/012074.

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6

Shahrbabaki, A. Nazarian, M. Bazazzadeh, and R. Khoshkhoo. "Investigation on Supersonic Flow Control Using Nanosecond Dielectric Barrier Discharge Plasma Actuators." International Journal of Aerospace Engineering 2021 (July 14, 2021): 1–14. http://dx.doi.org/10.1155/2021/2047162.

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In this paper, the effects of streamwise Nanosecond Dielectric Barrier Discharge (NS-DBD) actuators on Shock Wave/Boundary Layer Interaction (SWBLI) are investigated in a Mach 2.5 supersonic flow. In this regard, the numerical investigation of NS-DBD plasma actuator effects on unsteady supersonic flow passing a 14° shock wave generator is performed using simulation of Navier-Stokes equations for 3D-flow, unsteady, compressible, and k ‐ ω SST turbulent model. In order to evaluate plasma discharge capabilities, the effects of plasma discharge length on the flow behavior are studied by investigating the flow friction factor, the region of separation bubble formation, velocity, and temperature distribution fields in the SWBLI region. The numerical results showed that plasma discharge increased the temperature of the discharge region and boundary layer temperature in the vicinity of flow separation and consequently reduced the Mach number in the plasma discharge region. Plasma excitation to the separation bubbles shifted the separation region to the upstream around 6 mm, increased SWBLI height, and increased the angle of the separation shock wave. Besides, the investigations on the variations of pressure recovery coefficient illustrated that plasma discharge to the separation bubbles had no impressive effect and decreased pressure recovery coefficient. The numerical results showed that although the NS-DBD plasma actuator was not effective in reducing the separation area in SWBLI, they were capable of shifting the separation shock position upstream. This feature can be used to modify the structure of the shock wave in supersonic intakes in off-design conditions.

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7

Elkholy, A., S. Nijdam, E. van Veldhuizen, N. Dam, J. van Oijen, U. Ebert, and L. Philip H. de Goey. "Characteristics of a novel nanosecond DBD microplasma reactor for flow applications." Plasma Sources Science and Technology 27, no. 5 (May 21, 2018): 055014. http://dx.doi.org/10.1088/1361-6595/aabf49.

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8

Wu, Yun, Yifei Zhu, Wei Cui, Min Jia, and Yinghong Li. "Simulation of Nanosecond Pulsed DBD Plasma Actuation with Different Rise Times." Plasma Processes and Polymers 12, no. 7 (January 19, 2015): 642–54. http://dx.doi.org/10.1002/ppap.201400175.

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9

Paulauskas, R., D. Martuzevičius, R. B. Patel, J. E. H. Pelders, S. Nijdam, N. J. Dam, M. Tichonovas, N. Striūgas, and K. Zakarauskas. "Biogas combustion with various oxidizers in a nanosecond DBD microplasma burner." Experimental Thermal and Fluid Science 118 (October 2020): 110166. http://dx.doi.org/10.1016/j.expthermflusci.2020.110166.

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10

Miller, Vandana, Abraham Lin, Gregory Fridman, Alexander Fridman, and Peter Friedman. "Nanosecond-Pulsed DBD Plasma For A Clinical Trial Of Actinic Keratosis." Clinical Plasma Medicine 9 (February 2018): 44. http://dx.doi.org/10.1016/j.cpme.2017.12.068.

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11

Chen, Kun, Chen-Yao Wei, and Zhi-Wei Shi. "Effect of NS-DBD Actuator Parameters on the Aerodynamic Performance of a Flap Lifting Device." Applied Sciences 9, no. 23 (November 30, 2019): 5213. http://dx.doi.org/10.3390/app9235213.

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The flap lift device is an important part of the conventional configuration of aircrafts and has an important impact on the aerodynamic performance. In this paper, a high-efficiency, simple, and energy-saving nanosecond dielectric barrier discharge (DBD) plasma actuator is placed in the vicinity of the flap lift device to improve the aerodynamic performance of the flap by controlling the flow field. The two-dimensional airfoil GAW-1 and its 29% flap were selected as the research objects, and the nanosecond (NS) DBD actuators were fixed at different locations near the deflection angle of the 10°flap. The excitation frequency, pulse width, and energy density parameters of the pulse discharge were adjusted, and then, the effects of parameter changes on aerodynamic characteristics of the airfoil were studied by numerical simulation. The simulation results show that adjusting the excitation frequency on the aerodynamic drag is weak and that the effect on the aerodynamic lift is obvious. The increase of the discharge pulse width will have a more significant effect on the flow field, i.e., a proper increase of the discharge pulse width can achieve better drag reduction, and increase lift after a stall at a high angle of attack. Although the increase of discharge energy density can strengthen the pulse perturbation effect on the flow field, it also contributes to some adverse effects and has no obvious optimization effect on the control efficiency of lift increase and drag reduction.

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12

Lin, Abraham, Billy Truong, Gregory Fridman, Alexander A. Fridman, and Vandana Miller. "Immune Cells Enhance Selectivity of Nanosecond-Pulsed DBD Plasma Against Tumor Cells." Plasma Medicine 7, no. 1 (2017): 85–96. http://dx.doi.org/10.1615/plasmamed.2017019666.

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13

Zheng, J. G., J. Li, Z. J. Zhao, Y. D. Cui, and B. C. Khoo. "Numerical Study of Nanosecond Pulsed Plasma Actuator in Laminar Flat Plate Boundary Layer." Communications in Computational Physics 20, no. 5 (November 2016): 1424–42. http://dx.doi.org/10.4208/cicp.090615.140316a.

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AbstractNanosecond (ns) pulsed dielectric barrier discharge (DBD) actuator in a laminar flat plate boundary layer is investigated numerically in an attempt to gain some new insights into the understanding of ns DBD actuation mechanism. Special emphasis is put on the examination, separation and comparison of behaviors of discharge induced micro shock wave and residual heat as well as on the investigation of response of external flow to the two effects. The shock wave is found to introduce highly transient, localized perturbation to the flow and be able to significantly alter the flow pattern shortly after its initiation. The main flow tends to quickly recover to close to its undisturbed state due to the transient nature of perturbation. However, with the shock decay and final disappearance, another perturbation source in the vicinity of discharge region, which contains contribution from both residual heat and shock, becomes increasingly pronounced and eventually develops into a perturbation wave train in the boundary layer. The perturbation is relatively weak and may not be a Tollmien-Schlichting (TS) wave and not trigger the laminar-turbulent transition of boundary layer. Instead, it is more likely to manipulate the flow stability to achieve the strong control authority of this kind of actuation in the case of flow separation control. In addition, a parametric study over the different electrical and hydrodynamic parameters is also conducted.

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14

TANG, Jingfeng, Miao TANG, Desheng ZHOU, Putong KANG, Ximing ZHU, and Chaohai ZHANG. "Hysteresis characteristics of the initiating and extinguishing boundaries in a nanosecond pulsed DBD." Plasma Science and Technology 21, no. 4 (February 25, 2019): 044001. http://dx.doi.org/10.1088/2058-6272/aafbdb.

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15

Tao Shao, Zheng Niu, Cheng Zhang, Yang Yu, Hui Jiang, Wenfeng Li, Ping Yan, and Yuanxiang Zhou. "ICCD Observation of Homogeneous DBD Excitated by Unipolar Nanosecond Pulses in Open Air." IEEE Transactions on Plasma Science 39, no. 11 (November 2011): 2062–63. http://dx.doi.org/10.1109/tps.2011.2131686.

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16

Shao, Tao, Cheng Zhang, Kaihua Long, Dongdong Zhang, Jue Wang, Ping Yan, and Yuanxiang Zhou. "Surface modification of polyimide films using unipolar nanosecond-pulse DBD in atmospheric air." Applied Surface Science 256, no. 12 (April 2010): 3888–94. http://dx.doi.org/10.1016/j.apsusc.2010.01.045.

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17

Zhao, Guangyin, Yinghong Li, Hua Liang, Menghu Han, and Yun Wu. "Flow separation control on swept wing with nanosecond pulse driven DBD plasma actuators." Chinese Journal of Aeronautics 28, no. 2 (April 2015): 368–76. http://dx.doi.org/10.1016/j.cja.2014.12.036.

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18

Han, Menghu, Jun Li, Zhongguo Niu, Hua Liang, Guangyin Zhao, and Weizhuo Hua. "Aerodynamic performance enhancement of a flying wing using nanosecond pulsed DBD plasma actuator." Chinese Journal of Aeronautics 28, no. 2 (April 2015): 377–84. http://dx.doi.org/10.1016/j.cja.2015.02.006.

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19

Ndong, A. C. Aba'a, N. Zouzou, N. Benard, and E. Moreau. "Geometrical optimization of a surface DBD powered by a nanosecond pulsed high voltage." Journal of Electrostatics 71, no. 3 (June 2013): 246–53. http://dx.doi.org/10.1016/j.elstat.2012.11.030.

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20

Ahn, S., J. Chae, H. J. Kim, J. Y. Shin, and K. H. Kim. "ANALYSIS AND VERIFICATION OF NON-EQUILIBRIUM PLASMA FLOW FOR MULTI-SCALE MODELLING OF NANOSECOND-PULSE DIELECTRIC BARRIER DISCHARGE PLASMA." Journal of Computational Fluids Engineering 24, no. 1 (March 31, 2019): 48–54. http://dx.doi.org/10.6112/kscfe.2019.24.1.048.

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21

Zhang, Shen, Zhenli Chen, Binqian Zhang, and Yingchun Chen. "Numerical Investigation on the Effects of Dielectric Barrier on a Nanosecond Pulsed Surface Dielectric Barrier Discharge." Molecules 24, no. 21 (October 31, 2019): 3933. http://dx.doi.org/10.3390/molecules24213933.

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In order to understand the impacts of dielectric barrier on the discharge characteristics of a nanosecond pulsed surface dielectric barrier discharge (NS-DBD), the effects of dielectric constant and dielectric barrier thickness are numerically investigated by using a three-equation drift–diffusion model with a 4-species 4-reaction air chemistry. When the dielectric constant increases, while the dielectric barrier thickness is fixed, the streamer propagation speed (V), the maximum streamer length (L), the discharge energy ( Q D _ e i ), and the gas heating ( Q G H ) of a pulse increase, but the plasma sheath thickness (h), the fast gas heating efficiency η , and the charge densities on the wall surface decrease. When the dielectric barrier thickness increases, while the dielectric constant is fixed, V, L, Q D _ e i , and Q G H of a pulse decrease, but h, η , and the charge densities on the wall surface increase. It can be concluded that the increase of the dielectric constant or the decrease of the dielectric barrier thickness results in the increase of the capacitance of the dielectric barrier, which enhances the discharge intensity. Increasing the dielectric constant and thinning the dielectric barrier layer improve the performance of the NS-DBD actuators.

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22

Kimura, Taichi, Keisuke Udagawa(Takashima), and Hiroyuki Yamasaki. "Experimental Study on DBD Plasma Actuator with Combination of AC and Nanosecond Pulse Voltage." IEEJ Transactions on Power and Energy 131, no. 8 (2011): 701–7. http://dx.doi.org/10.1541/ieejpes.131.701.

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23

Long, Yuexiao, Huaxing Li, Xuanshi Meng, Feng Liu, and Shijun Luo. "Influence of Actuating Position on Asymmetric Vortex Control With Nanosecond Pulse DBD Plasma Actuators." IEEE Transactions on Plasma Science 44, no. 11 (November 2016): 2785–95. http://dx.doi.org/10.1109/tps.2016.2583543.

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24

YAO, Junkai, Danjie ZHOU, Haibo HE, Chengjun HE, Zhiwei SHI, and Hai DU. "Experimental investigation of lift enhancement for flying wing aircraft using nanosecond DBD plasma actuators." Plasma Science and Technology 19, no. 4 (March 10, 2017): 044002. http://dx.doi.org/10.1088/2058-6272/aa57f1.

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25

Kimura, Taichi, Keisuke Udagawa Takashima, and Hiroyuki Yamasaki. "Experimental Study of DBD Plasma Actuator with Combination of AC and Nanosecond Pulse Voltage." Electrical Engineering in Japan 185, no. 2 (July 16, 2013): 21–29. http://dx.doi.org/10.1002/eej.22292.

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26

Skourides, Christoforos, Dimitrios Nyfantis, Pénélope Leyland, Hugo Bosse, and Peter Ott. "Mechanisms of Control Authority by Nanosecond Pulsed Dielectric Barrier Discharge Actuators on Flow Separation." Applied Sciences 9, no. 15 (July 25, 2019): 2989. http://dx.doi.org/10.3390/app9152989.

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The mechanisms that should be considered for separation flow control applications of nanosecond pulsed dielectric barrier discharge (DBD) actuators were investigated on a NACA 0015 profile for velocities of 10 m / s ( R e = 100,000 ) and 20 m / s ( R e = 200,000 ) in ambient wind tunnel conditions. Near and post-stall angles of attack were considered ( 16 ∘ and 24 ∘ ). The dominant frequencies existing in the flow were measured. Moderate voltage levels were applied (4 and 7 kV ) and the actuator was operated at these identified dominant frequencies and compared with known effective frequencies from literature. In all cases, influences by the actuator on the flow structures were observed and the operation of the actuator at the dominant flow frequencies of a stalled airfoil was shown to give control authority.

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27

Shao, Tao, Cheng Zhang, Yang Yu, Zheng Niu, Hui Jiang, Jiayu Xu, Wenfeng Li, Ping Yan, and Yuanxiang Zhou. "Discharge characteristic of nanosecond-pulse DBD in atmospheric air using magnetic compression pulsed power generator." Vacuum 86, no. 7 (February 2012): 876–80. http://dx.doi.org/10.1016/j.vacuum.2011.03.022.

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28

Šimek, M., P. F. Ambrico, T. Hoder, V. Prukner, G. Dilecce, S. De Benedictis, and V. Babický. "Nanosecond imaging and emission spectroscopy of argon streamer micro-discharge developing in coplanar surface DBD." Plasma Sources Science and Technology 27, no. 5 (May 29, 2018): 055019. http://dx.doi.org/10.1088/1361-6595/aac240.

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29

Selivonin, I., C. Ding, S. Starikovskaia, and I. Moralev. "The effect of the exposed electrode oxidation on the filamentation thresholds of a nanosecond DBD." Journal of Physics: Conference Series 1698 (December 2020): 012028. http://dx.doi.org/10.1088/1742-6596/1698/1/012028.

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30

Xiaohua, Wang, Su Biao, Liu Dingxin, Wang Junhua, and Rong Mingzhe. "Study on SO2 Removal Efficiency by Nanosecond Rising Edge Pulse DBD Under Different Environmental Conditions." Plasma Science and Technology 9, no. 6 (December 2007): 728–31. http://dx.doi.org/10.1088/1009-0630/9/6/21.

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31

Liu, Feng, Haijing Chu, Yue Zhuang, and Zhi Fang. "Influence of dielectric materials on discharge characteristics of coaxial DBD driven by nanosecond pulse voltage." Plasma Research Express 2, no. 3 (August 6, 2020): 034001. http://dx.doi.org/10.1088/2516-1067/abaa36.

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32

Xu, Jiayu, Cheng Zhang, Tao Shao, Zhi Fang, and Ping Yan. "Formation of hydrophobic coating on PMMA surface using unipolar nanosecond-pulse DBD in atmospheric air." Journal of Electrostatics 71, no. 3 (June 2013): 435–39. http://dx.doi.org/10.1016/j.elstat.2012.12.011.

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33

Jiang, Hui, Tao Shao, Cheng Zhang, Zheng Niu, Yang Yu, Ping Yan, and Yuanxiang Zhou. "Comparison of AC and Nanosecond-Pulsed DBDs in Atmospheric Air." IEEE Transactions on Plasma Science 39, no. 11 (November 2011): 2076–77. http://dx.doi.org/10.1109/tps.2011.2146280.

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34

Boselli, Marco, Vittorio Colombo, Emanuele Ghedini, Matteo Gherardi, Romolo Laurita, Anna Liguori, Paolo Sanibondi, and Augusto Stancampiano. "High-Speed Multi-Imaging of Repetitive Unipolar Nanosecond-Pulsed DBDs." IEEE Transactions on Plasma Science 42, no. 10 (October 2014): 2744–45. http://dx.doi.org/10.1109/tps.2014.2330954.

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35

Pons, Jerome, Herve Rabat, Annie Leroy, and Dunpin Hong. "Experimental Study of a Surface DBD Actuator Supplied by an Atypical Nanosecond Rising High-Voltage Pulse." IEEE Transactions on Plasma Science 42, no. 6 (June 2014): 1661–68. http://dx.doi.org/10.1109/tps.2014.2321255.

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36

Elkholy, A., Y. Shoshyn, S. Nijdam, J. A. van Oijen, E. M. van Veldhuizen, U. Ebert, and L. P. H. de Goey. "Burning velocity measurement of lean methane-air flames in a new nanosecond DBD microplasma burner platform." Experimental Thermal and Fluid Science 95 (July 2018): 18–26. http://dx.doi.org/10.1016/j.expthermflusci.2018.01.011.

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37

Takana, Hidemasa, and Hideya Nishiyama. "Numerical simulation of nanosecond pulsed DBD in lean methane–air mixture for typical conditions in internal engines." Plasma Sources Science and Technology 23, no. 3 (May 22, 2014): 034001. http://dx.doi.org/10.1088/0963-0252/23/3/034001.

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38

Jiang, Peng-Chao, Wen-Chun Wang, Shuai Zhang, Li Jia, De-Zheng Yang, Kai Tang, and Zhi-Jie Liu. "An uniform DBD plasma excited by bipolar nanosecond pulse using wire-cylinder electrode configuration in atmospheric air." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 122 (March 2014): 107–12. http://dx.doi.org/10.1016/j.saa.2013.10.004.

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39

Laurita, R., D. Barbieri, M. Gherardi, V. Colombo, and P. Lukes. "Chemical analysis of reactive species and antimicrobial activity of water treated by nanosecond pulsed DBD air plasma." Clinical Plasma Medicine 3, no. 2 (December 2015): 53–61. http://dx.doi.org/10.1016/j.cpme.2015.10.001.

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40

Meropoulis, S., G. Rassias, V. Bekiari, and C. A. Aggelopoulos. "Structure-Degradation efficiency studies in the remediation of aqueous solutions of dyes using nanosecond-pulsed DBD plasma." Separation and Purification Technology 274 (November 2021): 119031. http://dx.doi.org/10.1016/j.seppur.2021.119031.

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41

Mi, Yan, Jiaxi Gou, Lulu Liu, Xin Ge, Hui Wan, and Quan Liu. "Enhanced Breakdown Strength and Thermal Conductivity of BN/EP Nanocomposites with Bipolar Nanosecond Pulse DBD Plasma Modified BNNSs." Nanomaterials 9, no. 10 (September 30, 2019): 1396. http://dx.doi.org/10.3390/nano9101396.

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Filling epoxy resin (EP) with boron nitride (BN) nanosheets (BNNSs) can effectively improve the thermal conductivity of BN/EP nanocomposites. However, due to the few hydroxyl groups on the surface of BNNSs, silane coupling agent (SCA) cannot effectively modify BNNSs. The agglomeration of BNNSs is severe, which significantly reduces the AC breakdown strength of the composites. Therefore, this paper uses atmospheric pressure bipolar nanosecond pulse dielectric barrier discharge (DBD) Ar+H2O low temperature plasma to hydroxylate BNNSs to improve the AC breakdown strength and thermal conductivity of the composites. X-ray photoelectron spectroscopy (XPS) shows that the hydroxyl content of the BNNSs surface increases nearly two fold after plasma modification. Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) show that plasma modification enhances the dehydration condensation reaction of BNNSs with SCA, and the coating amount of SCA on the BNNSs surface increases by 45%. The breakdown test shows that the AC breakdown strength of the composites after plasma modification is improved under different filling contents. With the filling content of BNNSs increasing from 10% to 20%, the composites can maintain a certain insulation strength. Meanwhile, the thermal conductivity of the composites increases by 67% as the filling content increases from 10% (SCA treated) to 20% (plasma and SCA treated). Therefore, the plasma hydroxylation modification method used in this paper can provide a basis for the preparation of high thermal conductivity insulating materials.

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42

Yang, Dezheng, Wenchun Wang, Shuai Zhang, Zhijie Liu, Li Jia, and Leyang Dai. "Atmospheric air homogenous DBD plasma excited by bipolar nanosecond pulse used for improving the hydrophilic property of polypropylene." EPL (Europhysics Letters) 102, no. 6 (June 1, 2013): 65001. http://dx.doi.org/10.1209/0295-5075/102/65001.

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43

Zhao, Guang-yin, Ying-hong Li, Wei-zhuo Hua, Hua Liang, Meng-hu Han, and Zhong-guo Niu. "Experimental study of flow control on delta wings with different sweep angles using pulsed nanosecond DBD plasma actuators." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 229, no. 11 (December 15, 2014): 1966–74. http://dx.doi.org/10.1177/0954410014562630.

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44

Cheng Zhang, Tao Shao, Kaihua Long, Yang Yu, Jue Wang, Dongdong Zhang, Ping Yan, and Yuanxiang Zhou. "Surface Treatment of Polyethylene Terephthalate Films Using DBD Excited by Repetitive Unipolar Nanosecond Pulses in Air at Atmospheric Pressure." IEEE Transactions on Plasma Science 38, no. 6 (June 2010): 1517–26. http://dx.doi.org/10.1109/tps.2010.2045660.

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45

Zhu, Yifei, Yun Wu, Wei Cui, Yinghong Li, and Min Jia. "Numerical investigation of energy transfer for fast gas heating in an atmospheric nanosecond-pulsed DBD under different negative slopes." Journal of Physics D: Applied Physics 46, no. 49 (November 19, 2013): 495205. http://dx.doi.org/10.1088/0022-3727/46/49/495205.

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46

Zhang, Shen, Zhenli Chen, Binqian Zhang, and Yingchun Chen. "Numerical Investigation on the Effects of Chemical Reactions on the Discharge Characteristics and Energy Balance of a Nanosecond Repetitive Pulsed Dielectric Barrier Discharge." Applied Sciences 9, no. 24 (December 11, 2019): 5429. http://dx.doi.org/10.3390/app9245429.

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Numerical investigation on a nanosecond repetitively pulsed dielectric barrier discharge (NS-DBD) in air is a temporal and spatial multi-scale problem involving a large number of species and chemical reactions. To know the effects of the species and chemical reactions on the discharge characteristics and energy balance, a high voltage repetitive plane to plane NS-DBD is numerically studied. Four groups of species and the corresponding chemical reactions are adopted in the investigation. The most complex one has 31 species and 99 chemical reactions that contains all reaction types, in particular, the vibrational-translational relaxation reactions, whereas the simplest one has only 4 species and 4 reactions, which represents the main kinetic processes. The others are in between. The discharge energy reaches to a periodic phase equality state after the second pulse in the repetitive pulses, and the present analysis is focused on the 7th pulse. All the N 2 / O 2 mixture reaction models predict almost the same discharge energies, which are qualitatively similar with that in the simplified 4-species model. The prediction of the discharge energy is determined by the electronic excitation and the energy gain by ions, but the vibrational excitation, negative ions, associative ionization, dissociation of nitrogen and oxygen molecules have very weak effects. The gas heating is determined by the exothermic reactions and the ions. The main processes in the fast and slow gas heating are the energy release of ions and the exothermic reactions, respectively. The negative ions, vibrational excitation, and associative ionization have very weak effects on the gas heating during the high voltage pulse, but they have considerable effects at a larger time scale. The magnitudes of the fast gas heating efficiency ( η G H ) are in the range of 41%∼47% in the N 2 / O 2 mixture reduced kinetic models, but η G H is higher in the 4-reaction model.

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47

Wang, Yaogong, Xiaoqin Ma, Long Hu, Xuan Zhou, Zhenxing Wang, and Xiaoning Zhang. "Ionization wave propagation characteristics under different polarity of pulse waveforms in micro-DBD device driven by bipolar nanosecond pulse waveform." Physics of Plasmas 26, no. 11 (November 2019): 112103. http://dx.doi.org/10.1063/1.5096547.

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48

Sun, Hao, Shuai Zhang, Yuan Gao, Cheng Zhang, and Tao Shao. "Self-heating effect on stability of a nanosecond pulsed DBD interacting with heptane and methylnaphthalene as heavy oil model compounds." IEEE Transactions on Dielectrics and Electrical Insulation 26, no. 2 (April 2019): 431–38. http://dx.doi.org/10.1109/tdei.2018.007745.

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Turrini, Eleonora, Romolo Laurita, Augusto Stancampiano, Elena Catanzaro, Cinzia Calcabrini, Francesca Maffei, Matteo Gherardi, Vittorio Colombo, and Carmela Fimognari. "Cold Atmospheric Plasma Induces Apoptosis and Oxidative Stress Pathway Regulation in T-Lymphoblastoid Leukemia Cells." Oxidative Medicine and Cellular Longevity 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/4271065.

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Abstract:

Cold atmospheric plasma (CAP) has shown its antitumor activity in both in vitro and in vivo systems. However, the mechanisms at the basis of CAP-cell interaction are not yet completely understood. The aim of this study is to investigate CAP proapoptotic effect and identify some of the molecular mechanisms triggered by CAP in human T-lymphoblastoid leukemia cells. CAP treatment was performed by means of a wand electrode DBD source driven by nanosecond high-voltage pulses under different operating conditions. The biological endpoints were assessed through flow cytometry and real-time PCR. CAP caused apoptosis in Jurkat cells mediated by p53 upregulation. To test the involvement of intrinsic and/or extrinsic pathway, the expression of Bax/Bcl-2 and caspase-8 was analyzed. The activation of caspase-8 and the upregulation of Bax and Bcl-2 were observed. Moreover, CAP treatment increased ROS intracellular level. The situation reverts after a longer time of treatment. This is probably due to compensatory cellular mechanisms such as the posttranscriptional upregulation of SOD1, CAT, and GSR2. According to ROS increase, CAP induced a significant increase in DNA damage at all treatment conditions. In conclusion, our results provide a deeper understanding of CAP potential in the oncological field and pose the basis for the evaluation of its toxicological profile.

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Zhang, Cheng, Yang Zhou, Tao Shao, Qing Xie, Jiayu Xu, and Wenjin Yang. "Hydrophobic treatment on polymethylmethacrylate surface by nanosecond-pulse DBDs in CF4 at atmospheric pressure." Applied Surface Science 311 (August 2014): 468–77. http://dx.doi.org/10.1016/j.apsusc.2014.05.091.

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