Design and Study of a Large-Scale Microwave Plasma Torch with Four Ports
Design and Study of a Large-Scale Microwave Plasma Torch with Four Ports
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DOI：
10.3390/pr11092589
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发表时间：
2023-08
期刊：
影响因子：
3.5
通讯作者：
Yedai Hu;Wencong Zhang;Jiahui Han;Huacheng Zhu;Yang Yang-Yang
中科院分区：
文献类型：
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作者：
Yedai Hu;Wencong Zhang;Jiahui Han;Huacheng Zhu;Yang Yang-Yang
微波等离子体炬(MPT)由于具有高能量密度、高电离能级和高温等优点，在工业上得到了广泛的应用。然而，微波等离子体源产生的不均匀和不稳定的等离子体限制了大规模MPTS的生产。本文提出了一种利用四端口微波源(2.45 GHz，4kW)来解决这些问题的新型MPT器件。新结构改善了等离子体的均匀性和稳定性，并通过在耦合腔中引入聚焦介质提高了微波效率。利用三维电磁场模型、微波等离子体模型和流体模型，对MPT器件的几何结构和进气方式进行了优化。实验结果表明，这种新型MPT器件可以产生最大高度为545 mm的等离子体炬，工作范围为10-95 L/min，微波效率高达86%。该器件不仅满足了工业应用的要求，而且为未来的MPT器件提供了设计思路和方法。
The microwave plasma torch (MPT) has gained popularity in industrial applications due to its high energy density, ionization levels, and high temperature. However, the non-uniform and unstable plasma generated by microwave plasma sources has limited the production of large-scale MPTs. This paper proposes a novel MPT device utilizing a four-port microwave source (2.45 GHz, 4 kW) to address these issues. The improved plasma uniformity and stability are achieved through the new structure, and the microwave efficiency is enhanced by introducing the focusing dielectric in the coupled cavity. Using a 3D electromagnetic field model, microwave plasma model and fluid model, the paper optimizes the geometry and inlet mode of the MPT device. Experimental results show that the novel MPT device can generate a plasma torch with a maximum height of 545 mm, a working range of 10–95 L/min, and a microwave efficiency up to 86%. The proposed device not only competently meets industrial requirements, but also provides design ideas and methods for future MPT devices.