Research on the characteristics of atmospheric pressure air pulse gas-liquid discharge using a needle-water electrode
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摘要: 利用纳秒脉冲电源激励大气压空气中针-水结构气液放电，研究了不同脉冲参数下的放电特性、等离子体特性和活化水中活性粒子浓度的变化规律。结果表明，在一个脉冲周期内放电分为3个阶段，其中发生在脉冲持续时间内和下降沿的两次放电较强，上升沿的放电较弱。当脉冲电压增大时，放电电流、平均功率、发光强度和发射光谱强度均逐渐增大；当频率增大时，放电电流几乎不变，但是功率显著增大，放电发光强度和发射光谱强度均增大。电压上升沿时间的增大则会减弱放电强度，相应的放电发光强度和发射光谱强度均减弱。而电压下降沿的增大则会增强放电，发光强度和发射光谱强度增大。当脉冲电压、频率和下降沿时间增大，H2O2，
${\rm{NO}}_2^ - $ 和${\rm{NO}}_3^ - $ 浓度逐渐增大；而电压上升沿时间增大会导致3种活性粒子浓度逐渐降低。Abstract: In this paper, a nanosecond pulse power supply is employed to excite the gas-liquid discharge in atmospheric air, and the discharge characteristics, plasma characteristics and the composition of activated water under different pulse parameters are studied. The results show that the discharge consists of three stages in one pulse period, among which the two discharges that occur during the pulse duration and the falling edge are stronger, and the discharge on the rising edge is weaker. When the pulse voltage increases, the discharge current, average power, luminous intensity and spectra intensity all gradually increase. When the frequency increases, the discharge current is almost unchanged, but the power increases significantly, the discharge luminous and spectra intensity also increase. The increase of the voltage rising edge time will weaken the discharge intensity, and the corresponding luminous intensity and spectra intensity will be weakened. The increase of the voltage falling edge enhances the discharge, and the luminous intensity and emission spectra intensity increase. When the pulse voltage, frequency and falling edge time increase, the concentration of H2O2,${\rm{NO}}_2^ - $ and${\rm{NO}}_3^ - $ gradually increases. The increase of the rising edge time results in the decrease of the three active species concentrations. These results are helpful to understand the mechanisms of gas-liquid discharge characteristics under different conditions, so as to control plasma and solution activity, which will promote further practical application of nanosecond pulse gas-liquid discharge.-
Key words:
- nanosecond pulse /
- gas-liquid discharge /
- atmospheric air /
- discharge characteristics
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图 1 大气压空气脉冲气-液放电实验平台
Figure 1. Experimental setup of nanosecond pulse gas-liquid discharge in atmospheric air
图 2 脉冲气液放电典型电压电流波形图
Figure 2. Typical waveforms of pulse voltage and discharge current in the pulse gas-liquid discharge
图 3 放电电流和平均功率随脉冲参数的变化
Figure 3. Variation of discharge current and average power with pulse parameters
图 5 脉冲气液放电典型发射光谱图（脉冲电压Up＝10 kV，频率f＝600 Hz，上升沿时间tr＝50 ns，下降沿时间tf＝50 ns）
Figure 5. Typical emission spectra of pulsed gas-liquid discharge (Up＝10 kV, f＝600 Hz, tr=50 ns, tf＝50 ns)
图 6 发射光谱强度随脉冲参数的变化
Figure 6. Variations of emission spectra intensity with pulse parameters
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[1] 梅丹华, 方志, 邵涛. 大气压低温等离子体特性与应用研究现状[J]. 中国电机工程学报, 2020, 40(4):1339-1358. (Mei Danhua, Fang Zhi, Shao Tao. Recent progress on characteristics and applications of atmospheric pressure low temperature plasmas[J]. Proceedings of the CSEE, 2020, 40(4): 1339-1358 [2] 戴栋, 宁文军, 邵涛. 大气压低温等离子体的研究现状与发展趋势[J]. 电工技术学报, 2017, 32(20):1-9. (Dai Dong, Ning Wenjun, Shao Tao. A review on the state of art and future trends of atmospheric pressure low temperature plasmas[J]. Transactions of China Electrotechnical Society, 2017, 32(20): 1-9 [3] 孔刚玉, 刘定新. 气体等离子体与水溶液的相互作用研究——意义、挑战与新进展[J]. 高电压技术, 2014, 40(10):2956-2965. (Kong Gangyu, Liu Dingxin. Researches on the interaction between gas plasmas and aqueous solutions: significance, challenges and new progresses[J]. High Voltage Engineering, 2014, 40(10): 2956-2965 [4] 侯世英, 曾鹏, 刘坤, 等. 单介质与双介质结构介质阻挡放电水处理性能的比较[J]. 高电压技术, 2012, 38(7):1562-1567. (Hou Shiying, Zeng Peng, Liu Kun, et al. Comparison of water treatment performance employ dielectric barrier discharge in single and double dielectric structure[J]. High Voltage Engineering, 2012, 38(7): 1562-1567 [5] Zhou Renwu, Zhou Rusen, Wang Peiyu, et al. Plasma-activated water: generation, origin of reactive species and biological applications[J]. Journal of Physics D: Applied Physics, 2020, 53: 303001. doi: 10.1088/1361-6463/ab81cf [6] Bradu C, Kutasi K, Magureanu M, et al. Reactive nitrogen species in plasma-activated water: generation, chemistry and application in agriculture[J]. Journal of Physics D: Applied Physics, 2020, 53: 223001. doi: 10.1088/1361-6463/ab795a [7] Hoeben W F L M, van Ooij P P, Schram D C, et al. On the possibilities of straightforward characterization of plasma activated water[J]. Plasma Chemistry and Plasma Processing, 2019, 39(3): 597-626. doi: 10.1007/s11090-019-09976-7 [8] Zhou Renwu, Zhou Rusen, Wang Peiyu, et al. Microplasma bubbles: reactive vehicles for biofilm dispersal[J]. ACS Applied Materials & Interfaces, 2019, 11(23): 20660-20669. [9] Hefny M M, Pattyn C, Lukes P, et al. Atmospheric plasma generates oxygen atoms as oxidizing species in aqueous solutions[J]. Journal of Physics D: Applied Physics, 2016, 49: 404002. doi: 10.1088/0022-3727/49/40/404002 [10] 顾建伟, 章程, 王瑞雪, 等. 不同条件下大气压脉冲弥散放电特性[J]. 强激光与粒子束, 2016, 28:015023. (Gu Jianwei, Zhang Cheng, Wang Ruixue, et al. Characteristics of pulsed diffuse discharges under different conditions in atmospheric air[J]. High Power Laser and Particle Beams, 2016, 28: 015023 doi: 10.11884/HPLPB201628.015023 [11] 姜慧, 章程, 邵涛, 等. 纳秒脉冲表面介质阻挡放电特性实验研究[J]. 强激光与粒子束, 2012, 24(3):592-596. (Jiang Hui, Zhang Cheng, Shao Tao, et al. Experimental study on characteristics of nanosecond-pulse surface dielectric barrier discharge[J]. High Power Laser and Particle Beams, 2012, 24(3): 592-596 doi: 10.3788/HPLPB20122403.0592 [12] Wang Sen, Yang Dezheng, Zhou Rusen, et al. Mode transition and plasma characteristics of nanosecond pulse gas-liquid discharge: effect of grounding configuration[J]. Plasma Processes and Polymer, 2020, 17: 1900146. doi: 10.1002/ppap.201900146 [13] 王琪, 王萌, 王珏, 等. 纳秒脉冲下变压器油两相流注放电仿真研究[J]. 强激光与粒子束, 2020, 32:025011. (Wang Qi, Wang Meng, Wang Jue, et al. Two-phase streamer characteristics in transformer oil under nanosecond impulses voltages[J]. High Power Laser and Particle Beams, 2020, 32: 025011 doi: 10.11884/HPLPB202032.190370 [14] Brandt S, Schütz A, Klute F D, et al. Dielectric barrier discharges applied for optical spectrometry[J]. Spectrochimica Acta Part B: Atomic Spectroscopy, 2016, 123: 6-32. doi: 10.1016/j.sab.2016.07.001 [15] Zhang Shuai, Wang Wenchun, Jiang Pengchao, et al. Comparison of atmospheric air plasmas excited by high-voltage nanosecond pulsed discharge and sinusoidal alternating current discharge[J]. Journal of Applied Physics, 2013, 114: 163301. doi: 10.1063/1.4825053 [16] Shao Tao, Long Kaihua, Zhang Cheng, et al. Experimental study on repetitive unipolar nanosecond-pulse dielectric barrier discharge in air at atmospheric pressure[J]. Journal of Physics D: Applied Physics, 2008, 41: 215203. doi: 10.1088/0022-3727/41/21/215203 [17] Zhou Xiongfeng, Liang Jianping, Zhao Zilu, et al. Ultra-high synergetic intensity for humic acid removal by coupling bubble discharge with activated carbon[J]. Journal of Hazardous Materials, 2021, 403: 123626. doi: 10.1016/j.jhazmat.2020.123626 [18] Wandell R J, Wang Huihui, Bulusu R K M, et al. Formation of nitrogen oxides by nanosecond pulsed plasma discharges in gas–liquid reactors[J]. Plasma Chemistry and Plasma Processing, 2019, 39(3): 643-666. doi: 10.1007/s11090-019-09981-w [19] Zhou Xiongfeng, Wang Wenchun, Yang Dezheng, et al. Controlling of reactive species in atmospheric Ar bubble discharge by adding N2/O2a[J]. Plasma Processes and Polymer, 2019, 16: 1800124. doi: 10.1002/ppap.201800124 [20] Bulusu R K M, Wandell R J, Gallan R O, et al. Nitric oxide scavenging of hydroxyl radicals in a nanosecond pulsed plasma discharge gas–liquid reactor[J]. Journal of Physics D: Applied Physics, 2019, 52: 504002. doi: 10.1088/1361-6463/ab431a -
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