Time-dependent computational simulations on cavity filling process by cold gas dynamic spray and powder jet deposition process ranging from microscale to macroscale were carried out in order to give an insight for their advanced applications to joining, crack repair, and dental treatment. Shock wave appears in front of the substrate due to underexpansion of jet and in-flight particles interact with the shock wave before their impact. The relation between shock wave, cavity configuration, and particle in-flight behavior in supersonic jet has been discussed in detail. Based on numerical and experimental studies, it was found that when the shock wave covers up the cylindrical cavity, the cavity cannot be filled at all by deposited powders. Moreover, under the condition of shock wave appearing inside the cylindrical cavity, conical deposition was formed due to the secondary back flow jet along the cavity side wall. By adopting conical cavity, cavity can be filled completely resulting from the suppression of the secondary back flow jet along the cavity side wall.
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e-mail: takana@paris.ifs.tohoku.ac.jp
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February 2010
Research Papers
Computational and Experimental Studies on Cavity Filling Process by Cold Gas Dynamic Spray
Hidemasa Takana,
Hidemasa Takana
Senior Assistant Professor
Institute of Fluid Science,
e-mail: takana@paris.ifs.tohoku.ac.jp
Tohoku University
, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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HongYang Li,
HongYang Li
Department of Mechanical Systems and Design, Graduate School of Engineering,
Tohoku University
, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
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Kazuhiro Ogawa,
Kazuhiro Ogawa
Associate Professor
Fracture and Reliability Research Institute,
Tohoku University
, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
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Tsunemoto Kuriyagawa,
Tsunemoto Kuriyagawa
Professor
Department of Nanomechanics, Graduate School of Engineering,
Tohoku University
, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
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Hideya Nishiyama
Hideya Nishiyama
Professor
Mem. ASME
Institute of Fluid Science,
Tohoku University
, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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Hidemasa Takana
Senior Assistant Professor
Institute of Fluid Science,
Tohoku University
, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japane-mail: takana@paris.ifs.tohoku.ac.jp
HongYang Li
Department of Mechanical Systems and Design, Graduate School of Engineering,
Tohoku University
, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
Kazuhiro Ogawa
Associate Professor
Fracture and Reliability Research Institute,
Tohoku University
, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
Tsunemoto Kuriyagawa
Professor
Department of Nanomechanics, Graduate School of Engineering,
Tohoku University
, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
Hideya Nishiyama
Professor
Mem. ASME
Institute of Fluid Science,
Tohoku University
, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JapanJ. Fluids Eng. Feb 2010, 132(2): 021302 (9 pages)
Published Online: February 4, 2010
Article history
Received:
December 16, 2008
Revised:
November 16, 2009
Online:
February 4, 2010
Published:
February 4, 2010
Citation
Takana, H., Li, H., Ogawa, K., Kuriyagawa, T., and Nishiyama, H. (February 4, 2010). "Computational and Experimental Studies on Cavity Filling Process by Cold Gas Dynamic Spray." ASME. J. Fluids Eng. February 2010; 132(2): 021302. https://doi.org/10.1115/1.4000802
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