Modelling of gas-powder transportation during coaxial laser cladding

Two-phase gas-powder flow modeling for a triple coaxial nozzle were carried out, based on equations of viscous gas dynamics and the SST-model of turbulence. Particles trajectories were calculated using of the Lagrangian approach simultaneously for all particles in the considered volume. The solution of the problem was realized using open source code OpenFoam and the author’s code. The verification of calculations is presented by comparison with the experimental data, obtained by the authors using the visualization system and their statistical processing. The performed calculations demonstrate the features of the flows of gas-powder jets in the outlet part of the nozzle and further in the free space, which performed for improving the effectiveness of its work.Two-phase gas-powder flow modeling for a triple coaxial nozzle were carried out, based on equations of viscous gas dynamics and the SST-model of turbulence. Particles trajectories were calculated using of the Lagrangian approach simultaneously for all particles in the considered volume. The solution of the problem was realized using open source code OpenFoam and the author’s code. The verification of calculations is presented by comparison with the experimental data, obtained by the authors using the visualization system and their statistical processing. The performed calculations demonstrate the features of the flows of gas-powder jets in the outlet part of the nozzle and further in the free space, which performed for improving the effectiveness of its work.