Numerical study on the effect of substrate angle on particle impact velocity and normal velocity component in cold gas dynamic spraying based on CFD

Shuo Yin, Xiao Fang Wang, Wen Ya Li, Bao Peng Xu

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Numerical study was conducted to investigate the effect of substrate angle on particle impact velocity and normal velocity component in cold gas dynamic spraying by using three-dimensional models based on computational fluid dynamics. It was found that the substrate angle has significant effect on particle impact velocity and normal velocity component. With increasing the substrate angle, the bow shock strength becomes increasingly weak, which results in a gradual rise in particle impact velocity. The distribution of the impact velocity presents a linearly increase along the substrate centerline due to the existence of the substrate angle and the growth rate rises gradually with increasing the substrate angle. Furthermore, the normal velocity component reduces steeply with the increase in substrate angle, which may result in a sharp decrease in deposition efficiency. In addition, the study on the influence of procedure parameters showed that gas pressure, temperature, type, and particle size also play an important role in particle acceleration.

Original languageEnglish
Pages (from-to)1155-1162
Number of pages8
JournalJournal of Thermal Spray Technology
Volume19
Issue number6
DOIs
StatePublished - Dec 2010

Keywords

  • bow shock
  • cold gas dynamic spray
  • impact velocity
  • numerical simulation
  • substrate angle
  • Three-dimensional model

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