Optical emission spectroscopy diagnostics of DBD plasma with particles in a two-dimensional spouted bed
Optical emission spectroscopy diagnostics of DBD plasma with particles in a two-dimensional spouted bed
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DOI：
10.1016/j.ces.2019.05.019
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发表时间：
2019-10
影响因子：
4.7
通讯作者：
Baiqian Zhang;Nobusuke Kobayashi;Y. Itaya;K. Ono;A. Suami
中科院分区：
文献类型：
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作者：
Baiqian Zhang;Nobusuke Kobayashi;Y. Itaya;K. Ono;A. Suami
为了深入了解等离子体增强喷流床中颗粒流化行为对等离子体特性的影响，本文研究了流化颗粒对等离子体光学发射光谱（OES）的影响。在二维喷流床上进行了介质阻挡放电等离子体发生器辐照下的流态化实验。基本的操作参数，如颗粒类型，施加电压，气体速度和颗粒数被改变。测量了粒子的压降、等离子体的发射强度（EI）和等离子体图案的高速相机图像。结果表明，等离子体辐照改变了颗粒的流态化行为，特别是聚丙烯（PP）颗粒。氩等离子体的发射光谱随粒子的变化有明显的变化。与无粒子的情况相比，有PP粒子的ari谱线发射强度增大，arii谱线发射强度减小。无论粒子的加入与否，Ar - I线的发射强度都随外加电压的增加而增强。流态化过程中，喷射强度随气体流速和颗粒数的变化而变化，喷射强度先增大后减小。不同颗粒数下最大发射强度值对应的气体速度与最小喷射速度的变化趋势相似。颗粒的电导率和颜色会影响两种颗粒的压降和探测发射强度的差异。我们的研究扩展了流化行为与等离子体光学特性之间关系的知识。
To gain an insight into the effect of fluidization behavior of particles on the characteristic of plasma in a plasma-enhanced spouted bed, we investigated the changes of plasma optical emission spectroscopy (OES) with fluidized particles in this paper. Fluidization experiments under the irradiation of a dielectric barrier discharge (DBD) plasma generator were performed in a two-dimensional spouted bed. Essential operation parameters, such as particle type, applied voltage, gas velocity, and particle number were changed. The pressure drop of particles, emission intensity (EI) of plasma, and high-speed camera images of plasma pattern were measured. As the results, the fluidization behavior of particles had been changed by the plasma irradiation, especially for polypropylene (PP) particles. The emission spectra of argon (Ar) plasma had been changed significantly with particles. The emission intensities of the Ar I transition lines were increased, and Ar II lines were decreased with PP particles compared to the case of no particle. The emission intensity of Ar I lines was enhanced with the applied voltage regardless of the addition of particles. The emission intensity changed with a gas velocity versus particle numbers was identified with the fluidization behavior, that emission intensity was increased at first and then decreased. The gas velocities corresponded to the highest value of emission intensity with various particle number were similar to the trend of the changes of minimum spouted velocity. The electrical conductivity and color of particles may affect the difference of pressure drop and detected emission intensity for two kinds of particles. Our research extends the knowledge of the relationship between fluidization behavior and plasma optical characteristic.