Abstract
The gas dynamics of high-velocity oxyfuel (HVOF) spraying can be described by conservation continuum equations of mass continuity, κ-ε models for turbulence, Navier-Stokes, and the equation of state, the latter accounting for density variations in the flow field. In previous work, a reduced kinetic eddy dissipation model has been validated against measured data, but only for constant mass flow. In this study, the equation of state for HVOF spraying is implemented in numerical modeling software in order to correlate variations in mass flow density with pressure and temperature. The results show how the temperature and pressure of the gases at the inlet of the nozzle, prior to entering the combustion chamber, influence combustion pressure as well as the compressibility of the gases before expanding to ambient pressure.
