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Shock-Wave-Induced Spraying: Modeling and Physics of a New Spray Process

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Abstract

A two-dimensional axisymmetric transient model for the shock-wave-induced spraying process (SISP) is developed. SISP is a new cold spray process used to apply coatings of various metallic materials onto a wide range of different substrates. The model is validated with reference to a simplified one-dimensional approximation of the flow field. The model solves equations for mass, momentum, energy, ideal-gas law, as well as turbulence. The valve is represented as a ball-seat-type valve. The results are presented as contours of flow variables in a space-time domain. Values of pressure, axial velocity, Mach number, as well as static and total temperature are examined. The effects of varying supply pressure and temperature on these flow variables are investigated in detail. Additionally, air and helium are compared as the driving gas.

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Acknowledgments

The authors would like to acknowledge the kind input and help provided by Dr. Ronald Barron of the University of Windsor. This was received through his two courses in computational fluid dynamics as well as his coaching of a course project that created the basis for this study. The research presented here is funded by NSERC through a few different grants, namely, a ‘Alexander Graham Bell’ scholarship held by M. Karimi at University of Windsor, NSERC Discovery grants held by Dr. Rankin at University of Windsor and Dr. Jodoin at University of Ottawa, as well as a NSERC - Idea to Innovation (I2I) grant held by Dr. Jodoin at University of Ottawa. The authors gratefully acknowledge this support.

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Authors and Affiliations

  1. Mechanical Engineering, University of Windsor, Windsor, ON, Canada

    Mo Karimi & Gary Rankin

  2. Mechanical Engineering, University of Ottawa, Ottawa, ON, Canada

    Bertrand Jodoin

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  1. Mo Karimi
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  2. Bertrand Jodoin
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  3. Gary Rankin
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Correspondence to Mo Karimi.

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Karimi, M., Jodoin, B. & Rankin, G. Shock-Wave-Induced Spraying: Modeling and Physics of a New Spray Process. J Therm Spray Tech 20, 866–881 (2011). https://doi.org/10.1007/s11666-011-9622-4

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  • DOI: https://doi.org/10.1007/s11666-011-9622-4

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