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Tomographic Measurements of Temperature Fluctuations in an Air Plasma Cutting Torch

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Abstract

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 μs. 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.

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Acknowledgement

The work was possible with institutional support RVO: 61388998.

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Authors and Affiliations

  1. Institute of Thermomechanics of the CAS, v.v.i., Czech Academy of Sciences, Dolejškova 5, 182 00, Praha 8, Czech Republic

    Jan Hlína, Jiří Šonský & Jan Gruber

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  1. Jan Hlína
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  2. Jiří Šonský
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  3. Jan Gruber
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Correspondence to Jan Hlína.

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Hlína, J., Šonský, J. & Gruber, J. Tomographic Measurements of Temperature Fluctuations in an Air Plasma Cutting Torch. Plasma Chem Plasma Process 37, 689–699 (2017). https://doi.org/10.1007/s11090-017-9794-x

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  • DOI: https://doi.org/10.1007/s11090-017-9794-x

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