Computational and Experimental Studies on Cavity Filling Process by Cold Gas Dynamic Spray-Reference-Cited by-同舟云学术

Computational and Experimental Studies on Cavity Filling Process by Cold Gas Dynamic Spray

Published:2010-02-01 Issue:2 Volume:132 Page:
ISSN:0098-2202
Container-title:Journal of Fluids Engineering
language:en
Short-container-title:

Author:

Takana Hidemasa¹,Li HongYang²,Ogawa Kazuhiro³,Kuriyagawa Tsunemoto⁴,Nishiyama Hideya⁵¹

Affiliation:

1. Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

2. Department of Mechanical Systems and Design, Graduate School of Engineering, Tohoku University, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

3. Fracture and Reliability Research Institute, Tohoku University, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

4. Department of Nanomechanics, Graduate School of Engineering, Tohoku University, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

5. Mem. ASME

Abstract

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.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/fluidsengineering/article-pdf/doi/10.1115/1.4000802/5738870/021302_1.pdf

Reference24 articles.

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2. Alkhimov, A. P., Papyrin, A. N., Kosarev, V. F., and Nesterovich, N. I., 1995, “Method and Device for Coating,” European Patent EP 0,484,533 B1.

3. Structure of Aluminum Powder Coatings Prepared by Cold Gasdynamic Spraying;Tokarev;Metal Science and Heat Treatment

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