Tomographic Measurements of Temperature Fluctuations in an Air Plasma Cutting Torch

被引：2
作者：
Hlina, Jan [1 ]
Sonsky, Jiri [1 ]
Gruber, Jan [1 ]
机构：
[1] Czech Acad Sci, Inst Thermomech CAS, Vvi, Dolejskova 5, Prague 18200 8, Czech Republic
来源：
PLASMA CHEMISTRY AND PLASMA PROCESSING | 2017年 / 37卷 / 03期
关键词：
Cutting arc; Air plasma; Tomography; Temperature distribution; Fluctuation;
D O I：
10.1007/s11090-017-9794-x
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A tomographic optical system and method based on evaluations of plasma radiation in a wavelength range of 559-601 nm were used to acquire temperature distributions in an air plasma cutting torch in planes perpendicular to the arc axis with a time resolution of 1 mu s. The derived frequency spectra and distributions of temperature fluctuations represented by standard deviations have shown significant variations in distributions of instabilities, depending on the time scales which are taken into account. The results confirmed the decisive role of arc current ripple modulation in the arc temperature fluctuations.
引用
收藏
页码：689 / 699
页数：11
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