REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

MODELING OF SPRAY DEPOSITION PROCESS FOR SUBSTRATE OF AXISYMMETRIC GEOMETRY

Milan Prokolab

Institute Gosa, Belgrade, milan.prokolab@institutgosa.rs

Mirjana Prvulović,

Institute Gosa, Belgrade, mirjanaprvulovic@gmail.com

MARKO RISTIĆ

Institute Gosa, Belgrade, marko.ristic@institutgosa.rs

Abstract: Modeling of the spray process for axisymmetric rotating substrate in a nitrogen atmosphere has been performed. Mathematical model of the spray deposition process is solved numerically by Runge –Kutta method. The numerical computer simulation is developed in order to define process parameters and obtain deposits with exactly determined geometry and controlled level of porosity. The influence of the relevant process parameters on the porosity of the obtained deposit has been analyzed. Numerical experiments show that the main condition for growth of good quality spray deposit is a balance of both the solidification rate of the semi-solid/semi liquid surface layer and the spray deposition rate.

Keywords: spray deposition process, numerical simulation, rotating substrate.