Numerical simulation of thermal spray processing

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:377761

Eidelman, S; Yang, X; Lottati, I; Grossmann, W ^[1]

---

1. SAIC, McLean, VA (United States)

The rapid, multiphase, multicomponent, and reactive flow processes occurring on different time and spatial scales complicate both numerical and experimental analysis of thermal spray (TS) systems. In addition, practical applications call for consideration of geometric details of the jet spray/three-dimensional substrate or powder collector interaction. In the paper, the authors apply a newly developed system of numerical tools for analysis of TS processes. These CFD tools are based on unstructured, adaptive griding techniques implemented on triangles or tetrahedrals. The unstructured grids allow consideration of the complex geometric details of the gun or substrate. The unstructured grids were used with a structured, three-dimensional grid for simulation of the Metco DJ gun and TAFA JP-5000 gun. The numerical results were validated by comparison with the experimental data. The numerical and experimental results show less than 10 percent divergence for the velocity field data, both along the jet axis and in the jet cross section at the gun exit. The methodology has a potential to significantly improve TS gun performance through control of its parameters. This approach also will be a key for process scalability and reliability improvement.

• OSTI ID: 377761
• Report Number(s): CONF-9509182--; ISBN 0-87170-541-9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMBUSTION
DENSITY
FLAME SPRAYING
GAS FLOW
LAGRANGIAN FUNCTION
MATHEMATICAL MODELS
NUMERICAL SOLUTION
PARTICULATES
POWDERS
TEMPERATURE DEPENDENCE
THREE-DIMENSIONAL CALCULATIONS
TRAJECTORIES
VALIDATION
VELOCITY