Experimental and numerical evaluation of the performance of supersonic two-stage high-velocity oxy-fuel thermal spray (Warm Spray) gun View Full Text


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Article Info

DATE

2011-02

AUTHORS

H. Katanoda, H. Morita, M. Komatsu, S. Kuroda

ABSTRACT

The water-cooled supersonic two-stage high-velocity oxy-fuel (HVOF) thermal spray gun was developed to make a coating of temperature-sensitive material, such as titanium, on a substrate. The gun has a combustion chamber (CC) followed by a mixing chamber (MC), in which the combustion gas is mixed with the nitrogen gas at room temperature. The mixed gas is accelerated to supersonic speed through a converging-diverging (C-D) nozzle followed by a straight passage called the barrel. This paper proposes an experimental procedure to estimate the cooling rate of CC, MC and barrel separately. Then, the mathematical model is presented to predict the pressure and temperature in the MC for the specific mass flow rates of fuel, oxygen and nitrogen by assuming chemical equilibrium with water-cooling in the CC and MC, and frozen flow with constant specific heat from stagnant condition to the throat in the CC and MC. Finally, the present mathematical model was validated by comparing the calculated and measured stagnant pressures of the CC of the two-stage HVOF gun. More... »

PAGES

88-92

References to SciGraph publications

  • 1992-06. A pragmatic analysis and comparison of HVOF processes in JOURNAL OF THERMAL SPRAY TECHNOLOGY
  • 2009-09. Mathematical Modeling and Experimental Validation of the Warm Spray (Two-Stage HVOF) Process in JOURNAL OF THERMAL SPRAY TECHNOLOGY
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/s11630-011-0440-2

    DOI

    http://dx.doi.org/10.1007/s11630-011-0440-2

    DIMENSIONS

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