Abstract
The cold gas dynamic spray (CGDS) process is a promising technology to produce high strength, strong corrosion resistance and excellent wear-resistant coating. This technology is able to equip the manufacturers to meet more stringent requirements of engineering components they produce. In this study, a two-step numerical methodology is developed to simulate the powder-laden flow in the CGDS process. In the first step the gas dynamics involved in CGDS process is studied. It essentially consists of a development of supersonic flow within CGDS nozzle followed by a supersonic jet impinging on the substrate. A particle model is then developed to calculate the particle flight path, and the deposition process. The relationships between the nozzle stand-off distance, spray area and such CGDS operating parameters as nozzle pressure ratio, temperature of carrier gas, particle inject locations are investigated and reported.
