Atmospheric pressure plasma jet impinging on fiber arrays: Penetration pattern determined by fiber spacing
Atmospheric pressure plasma jet impinging on fiber arrays: Penetration pattern determined by fiber spacing
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DOI：
10.1063/5.0139361
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发表时间：
2023-02-20
影响因子：
4
通讯作者：
Wang, Ruixue
中科院分区：
文献类型：
--
作者：
Kong, Xianghao;Li, Haoyi;Wang, Ruixue
大气压冷等离子体具有很大的表面功能化潜力，等离子体和纤维之间的相互作用对于理解底层物理是必不可少的。本文通过实验和模拟研究了大气压等离子体射流（APPJ）与不同间距纤维支架相互作用的穿透模式和机理。增强的电荷耦合器件图像显示，APPJ在支架的迎风侧上诱导了径向表面流光，在相对侧上诱导了另一个轴向向前流光。径向和轴向流光的传播距离随着间距的减小而减小。2D流体模型也预测了类似的趋势。模拟结果表明，对于大间距脚手架，APPJ中的流注头所携带的高电场可以通过差距，而对于小间距脚手架，流注头所携带的高电场会被高强度电荷阻挡。相反，在后一种情况下产生一个轴向流光。本文对等离子体射流与光纤阵列相互作用的穿透机理的物理认识有助于提高等离子体技术的处理均匀性。
Atmospheric pressure cold plasmas have great potential for surface functionalization, and the interaction between the plasmas and fibers is essential to understand the underlying physics. In this Letter, the penetration pattern and mechanism of an atmospheric pressure plasma jet (APPJ) interacting with different spacing fiber scaffolds were studied by both experiment and modeling. The intensified charge coupled device images showed that APPJ induced a radial surface streamer on the windward side of the scaffold and another axial forward streamer on the opposite side. Propagation distance of both the radial and axial streamers diminished as the spacing decreased. Similar trends were predicted by a 2D fluid model. The simulation results indicated that the high electrical field carried by the streamer head in APPJ was allowed to pass through the gap for large spacing scaffold, while it was blocked by high intensity charges at small spacing. Instead, one axial streamer was generated in the latter case. The physical insight on the penetration mechanism of plasma jet interacting with fiber array in this Letter may contribute to improve treatment uniformity of plasma technology.