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多针-平板电晕介质阻挡放电产生等离子的能量转化效率研究
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摘要
本文研究了等离子激励源工作频率、针电极密度、介质材料、介质厚度对多针—平板电晕介质阻挡放电产生等离子过程中的能量转化效率的影响。在相同输入电压条件下,能量转化效率随等离子体激励源工作频率的增加呈现先增大后减小趋势。当等离子体激励源工作在8.5kHz即系统谐振频率附近时,能量转化效率达到最大值。当针尖距离为2mm时,能量转化效率随着电极密度的增大而减小;当针尖之间的距离为7mm和23mm时,增大电极密度会提高能量转化效率。介质相对介电常数的增加、介质厚度的减小均有利于能量转化效率的提高。
Effects of discharge frequency of the power supple, needle-electrode density, dielectric material and dielectric thickness on the energy efficiency of multi needle-to-plane dielectric barrier discharge plasma was investigated in the present study. Under the condition of the same input voltage, the energy efficiency was found to increase and then decrease with the increase of discharge frequency. When it worked at 8.5 kHz, near the resonance frequency of the circuit, the energy efficiency reached the maximum value. Under the condition of needle-distance 2mm, the energy efficiency decreased with the increase of needle-electrode density, while it increased with needle-electrode density as the needle-distance was 7 mm or 23 mm. Increase of the dielectric constant and decrease of the dielectric thickness both contributed to enhance the energy efficiency.
引文
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