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Numerical Study on the Effect of Substrate Angle on Particle Impact Velocity and Normal Velocity Component in Cold Gas Dynamic Spraying Based on CFD

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Abstract

Numerical study was conducted to investigate the effect of substrate angle on particle impact velocity and normal velocity component in cold gas dynamic spraying by using three-dimensional models based on computational fluid dynamics. It was found that the substrate angle has significant effect on particle impact velocity and normal velocity component. With increasing the substrate angle, the bow shock strength becomes increasingly weak, which results in a gradual rise in particle impact velocity. The distribution of the impact velocity presents a linearly increase along the substrate centerline due to the existence of the substrate angle and the growth rate rises gradually with increasing the substrate angle. Furthermore, the normal velocity component reduces steeply with the increase in substrate angle, which may result in a sharp decrease in deposition efficiency. In addition, the study on the influence of procedure parameters showed that gas pressure, temperature, type, and particle size also play an important role in particle acceleration.

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Acknowledgments

The authors would like to acknowledge the financial support by National 973 Basics Science Research Program (No. 2009CB724303) and the National Natural Science Foundation of China (No. 50476075).

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Authors and Affiliations

  1. School of Energy and Power Engineering, Dalian University of Technology, Dalian, 116024, Liaoning, China

    Shuo Yin & Xiao-fang Wang

  2. Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi’ an, 710072, China

    Wen-ya Li

  3. Faculty of Engineering, Kingston University, Friars Avenue, London, SW15 3DW, UK

    Bao-peng Xu

Authors
  1. Shuo Yin
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  2. Xiao-fang Wang
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  3. Wen-ya Li
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  4. Bao-peng Xu
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Correspondence to Shuo Yin.

Additional information

This article is an invited paper selected from presentations at the 4th Asian Thermal Spray Conference (ATSC 2009) and has been expanded from the original presentation. ATSC 2009 was held at Nanyang Hotel, Xi’an Jiaotong University, Xi’an, China, October 22-24, 2009, and was chaired by Chang-Jiu Li.

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Yin, S., Wang, Xf., Li, Wy. et al. Numerical Study on the Effect of Substrate Angle on Particle Impact Velocity and Normal Velocity Component in Cold Gas Dynamic Spraying Based on CFD. J Therm Spray Tech 19, 1155–1162 (2010). https://doi.org/10.1007/s11666-010-9510-3

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  • DOI: https://doi.org/10.1007/s11666-010-9510-3

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