The Influence of Powder Feeding Rate on the External Flow Field of a Three Channel Coaxial Powder Feeding Nozzle

Shisong Wang

doi:10.6919/ICJE.202408_10(8).0008

Authors

Shisong Wang

DOI:

https://doi.org/10.6919/ICJE.202408_10(8).0008

Keywords:

Additive Manufacturing; Laser Metal Deposition; Powder Flow Behavior; Numerical Simulation; Coaxial Nozzles.

Abstract

This article introduces the numerical simulation of the powder outflow flow field of laser metal deposition (LMD) coaxial powder feeding nozzle software under different powder feeding rates. The simulation results under different powder feeding rates show that as the powder feeding rate increases, the position of the powder convergence point remains unchanged, and the focus is located 14mm below the axis; The powder concentration on the convergence point plane increases, but the powder flow velocity slightly decreases; The powder aggregation area increases, and more powder particles gather on the nozzle axis. The results of this study have certain reference value for optimizing the process parameters of laser metal deposition processing.

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