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Discharge and mass transfer characteristics of atmospheric pressure gas-solid two-phase gliding arc

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摘要 In this work,a gas-solid two-phase gliding arc discharge(GS-GAD)reactor was built.Gliding arc was formed in the gap between the blade electrodes,and solid powder was deposited on the sieve plate positioned beneath the blade electrodes.A range of experimental parameters,including the inter-electrode spacing,gas flow rate,applied voltage,and the type of the powder,were systematically varied to elucidate the influence of solid powder matter on the dynamics of gliding arc discharge(GAD).The discharge images were captured by ICCD and digital camera to investigate the mass transfer characteristics of GS-GAD,and the electrical parameters,such as the effective values of voltage,current,and discharge power were record to reveal the discharge characteristics of GS-GAD.The results demonstrate that powder undergoes spontaneous movement towards the upper region of the gliding arc due to the influence of electric field force.Increasing the discharge voltage,decreasing relative dielectric constant of the powder and reducing the electrode-to-sieve-plate distance all contribute to a greater involvement of powder in the GAD process,subsequently resulting in an enhanced powder concentration within the GAD region.Additionally,powder located beneath the gliding arc experiences downward resistance caused by the opposing gas flow and arc.Excessive gas flow rate notably hampers the powder concentration within the discharge region,and the velocity of powder motion in the upper part of the GAD region is reduced.Under the condition of electrode-to-sieve-plate distance of 30 mm,gas flow rate of 1.5 L/min,and peak-to-peak voltage of 31 kV,the best combination of arc gliding and powder spark discharge phenomena can be achieved with the addition of Al_(2)O_(3) powder.
作者 Min ZHU Yuchen PING Yinghao ZHANG Chaohai ZHANG Shuqun WU 朱珉;平宇辰;张英豪;张潮海;吴淑群(Department of Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,People’s Republic of China)
出处 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第9期88-96,共9页 等离子体科学和技术(英文版)
基金 supported by 173 Program of China,and National Natural Science Foundation of China(No.92271116).
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