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A Method to Estimate the Optical Thickness of an Opaque Stream of Particles Based on Particle Rate, Size and Velocity Measurements as A Necessity to Enable Tomographic Analysis

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Abstract

Diagnostic methods using a tomographic reconstruction allow for three-dimensional characterization of spraying processes. Since in many spraying applications, non-rotationally symmetric phenomena occur, the application of emission tomography methods seems most reasonable. Yet, to be able to apply this method the observed object has to be luminous and optically thin. Hence, to investigate a particle stream, the optical thickness of such a stream has to be estimated beforehand. Within this paper, a method to determine this parameter, based on particle rate, size and velocity measurements is presented and applied to a wire arc spray process, proving that it is possible to perform a tomographic investigation of a particle beam.

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Authors and Affiliations

  1. EIT1/Lab for Plasma Technology (LPT), Bundeswehr University Munich, Neubiberg, Germany

    M. Szulc, S. Kirner, M. Bredack, G. Forster & J. Schein

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  1. M. Szulc
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  2. S. Kirner
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  3. M. Bredack
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  4. G. Forster
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  5. J. Schein
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Correspondence to M. Szulc.

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Szulc, M., Kirner, S., Bredack, M. et al. A Method to Estimate the Optical Thickness of an Opaque Stream of Particles Based on Particle Rate, Size and Velocity Measurements as A Necessity to Enable Tomographic Analysis. J Therm Spray Tech 28, 1627–1635 (2019). https://doi.org/10.1007/s11666-019-00910-z

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  • DOI: https://doi.org/10.1007/s11666-019-00910-z

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