Control of spray spot shape in cold spray technology. Part 2. Spraying process
V.N. Zaikovskii, S.V. Klinkov, V.F. Kosarev, B.M. Melamed, and G.V. Trubacheev
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
E-mail: vkos@itam.nsc.ru
Keywords: supersonic jet, gas-dynamic cold spray, spray spot
Abstract
The present paper studies high-velocity heterogeneous flows produced with nozzle designs unconventional for cold spray; the process of coating deposition was studied under these conditions. The possibility of using uncon-ventional gas dynamic tools (swirling of main flow, nozzles with permeable profiles and with slots in the supersonic part of nozzle) for control of particle distribution in the supersonic jet is investigated: this might be useful for obtaining a proper shape of the spray spot. These experiments offered a method of gas-dynamic design for the spray spot shape, which extends the possibilities of cold spray technique.
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