PIV Measurement and Numerical Simulation of the Particle Velocity in a HVAF Spray

A computational fluid dynamics model for understanding the HVAF process and the influence of the process parameters on the particle flight properties is investigated. Achieving this objective involves a novel approach to modeling the HVAF process with pressure inlet boundary conditions and integration of the mixing chamber. The study comprises the prediction of the flow fields described by a set of equations consisting of continuity, momentum, energy, and species transport. These equations are then solved with realizable k-ε turbulence model, a two-step chemistry model and eddy dissipation model to simulate the combustion reaction. Consequently, the interaction between the CoNiCrAlY alloy particles and the flow is modeled using a Lagrangian approach considering the forces acting on the particles and the heat transfer. The results show that the gas flow field is mainly affected by the compressed air and propane parameters. Furthermore, the flight behavior of the smaller particles is significantly influenced by the gas flow, while the larger particles tend to maintain their momentum and energy. Through the simulation model, an in-depth process understanding of the HVAF process can be achieved. More importantly, the model can be used as a tool for efficient process development.

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Microstructural Evolution and Tribological Responses of Heat-Treated AlFeCoNiCr–Cr3C2 Coating

Liu,

Ji,

Yang

et al. 2024

J Therm Spray Tech

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PIV Measurement and Numerical Simulation of the Particle Velocity in a HVAF Spray

Cited by 4 publications

References 0 publications

Effect of Nozzle Geometry on the Microstructure and Properties of HVAF-Sprayed WC-10Co4Cr and Cr3C2-25NiCr Coatings

Effect of Nozzle Geometry on the Microstructure and Properties of HVAF-Sprayed WC-10Co4Cr and Cr3C2-25NiCr Coatings

Correlation Between Process Parameters and Particle In-flight Behavior in AC-HVAF

Microstructural Evolution and Tribological Responses of Heat-Treated AlFeCoNiCr–Cr3C2 Coating

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