Abstract
To clarify the characteristics of gas flow in high velocity oxy-fuel (HVOF) thermal spray gun, aerodynamic research is performed using a special gun. The gun has rectangular cross-sectional area and sidewalls of optical glass to visualize the internal flow. The gun consists of a supersonic nozzle with the design Mach number of 2.0 followed by a straight passage called barrel. Compressed dry air up to 0.78 MPa is used as a process gas instead of combustion gas which is used in a commercial HVOF gun. The high-speed gas flows with shock waves in the gun and jets are visualized by schlieren technique. Complicated internal and external flow-fields containing various types of shock wave as well as expansion wave are visualized.
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Katanoda, H., Matsuoka, T., Kuroda, S. et al. Aerodynamic study on supersonic flows in high-velocity oxy-fuel thermal spray process. J. of Therm. Sci. 14, 126–129 (2005). https://doi.org/10.1007/s11630-005-0022-2
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DOI: https://doi.org/10.1007/s11630-005-0022-2