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Elucidation of Mechanism for Reducing Porosity in Electric Arc Spraying Through CFD

  • Ryoji Tamaki
  • Masashi Yamakawa
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10860)

Abstract

We elucidated the mechanism for reducing the porosity (a means for achieving smaller globules) through Computational Fluid Dynamics while focusing on the flow of compressed air. A simulation study revealed that a spray gun nozzle comprising a flow splitting plate located upstream of the arc point in the nozzle produces compression waves whereby the flow field made in the nozzle differs substantially from that made in a conventional, plate-less nozzle. Observation using a high-speed camera showed that smaller particles of the molten metal (globules) were made due to the plate, which means that the compression waves generated upstream of the arc point affect the formation of globules at the arc point.

Keywords

Electric arc spraying Compression wave Compression Expansion 

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Daihen Co., Ltd.KobeJapan
  2. 2.Kyoto Institute of TechnologyKyotoJapan

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