Measurements of 3D slip velocities and plasma column lengths of a gliding arc discharge
Measurements of 3D slip velocities and plasma column lengths of a gliding arc discharge
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DOI：
10.1063/1.4906928
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发表时间：
2015-01
影响因子：
4
通讯作者：
Jiajian Zhu;Jinlong Gao;A. Ehn;M. Aldén;Zhongshan Li;D. Moseev;Y. Kusano;M. Salewski;A. Alpers;P. Gritzmann;M. Schwenk
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文献类型：
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作者：
Jiajian Zhu;Jinlong Gao;A. Ehn;M. Aldén;Zhongshan Li;D. Moseev;Y. Kusano;M. Salewski;A. Alpers;P. Gritzmann;M. Schwenk
在大气压力下，在气流中产生非热滑动电弧放电。用两台同步高速摄像机记录了等离子体柱和示踪粒子的动力学。鉴于此类系统的数据分析以前是在2D中进行的（分析单相机图像），我们在这里提供了一个3D数据分析，包括等离子体柱的3D重建和基于离散断层扫描方法的3D粒子跟踪速度测定。三维分析，特别是等离子体柱和气流之间的三维滑移速度的测定，使对流冷却过程更加真实。此外，通过测定等离子体柱的三维滑移速度和三维长度，可以更准确地估计等离子体柱的阻力、电场强度、单位长度功率和导电区半径。
A non-thermal gliding arc discharge was generated at atmospheric pressure in an air flow. The dynamics of the plasma column and tracer particles were recorded using two synchronized high-speed cameras. Whereas the data analysis for such systems has previously been performed in 2D (analyzing the single camera image), we provide here a 3D data analysis that includes 3D reconstructions of the plasma column and 3D particle tracking velocimetry based on discrete tomography methods. The 3D analysis, in particular, the determination of the 3D slip velocity between the plasma column and the gas flow, gives more realistic insight into the convection cooling process. Additionally, with the determination of the 3D slip velocity and the 3D length of the plasma column, we give more accurate estimates for the drag force, the electric field strength, the power per unit length, and the radius of the conducting zone of the plasma column.