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Xiaoxi DUAN 《等离子体科学和技术》2019,21(8):85401-46
In this paper, various patterns of dielectric barrier glow discharge simulated by a phenomenological dynamic model are reported. The model is constructed based on the basic dynamic process of dielectric barrier glow discharge and involves the voltage-transfer characteristic as well as the lateral inhibition effect. In simulations, different driving voltage profiles are applied to achieve one or two pulsed discharges in each half-period and the corresponding pattern evolution is investigated. The final stable patterns driven by a rectangular wave voltage organize simply as stationary striations or hexagonal lattices. The patterns driven by a multi-step wave appear to be much more complicated, with complementary striations, concentric rings and square superlattices observed. The evolutions of these patterns from the initial uniform state are described and it is found that the spreading of the inhibition effect plays a key role in these evolutions. The numerical simulations in the present work are in excellent accordance with previous experiments and fluid modeling. This dynamic model proves to be a convenient and promising approach to reproducing different pattern structures and pattern evolutions in dielectric barrier glow discharge systems. 相似文献
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在冷轧连续退火机组生产带钢的过程中,退火炉炉辊表面常常结瘤,影响其使用寿命和带钢的表面质量。为此,通过金相检验、能谱分析等研究了炉辊结瘤的原因,并通过模拟试验进行了验证。结果表明:炉辊结瘤主要是Mn和Fe的氧化物。在生产过程中,带钢进入退火炉时合金元素发生选择性氧化,其表面形成不稳定的Mn氧化物,与炉辊发生化学反应产生结瘤的基础层。炉辊涂层具有抑制Fe氧化物结瘤的作用,但如果Mn氧化物富集厚度超过炉辊涂层元素的扩散范围,涂层抑制Fe氧化物结瘤的作用将消失。此外,简述了涂层炉辊的优缺点和应用。 相似文献
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