Computational and experimental studies on cavity filling process by cold gas dynamic spray

Hidemasa Takana, Hong Yang Li, Kazuhiro Ogawa, Tsunemoto Kuriyagawa, Hideya Nishiyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Real-time computational simulations on cavity filling process by cold gas dynamic spray and powder jet deposition process with covering from micro to macroscale were carried out in order to give an insight for their advanced applications to joining, crack repair and dental treatment. It was made clear that shock wave appears in front of the substrate due to under-expansion of jet, even in a micro nozzle-substrate distance in the powder jet deposition process. By clarifying the relation between shock wave, cavity configuration and particle in-flight behavior in supersonic jet in detail, optimum cavity configuration for cavity filling process has been proposed both numerically and experimentally. When the the shock wave covers up the cylindrical cavity, cavity cannot be filled at all. Under the condition of shock wave appearing inside the cylindrical cavity, cone-shape deposition was formed due to the back flow jet near the cavity side wall. By adopting cone-shape cavity, cavity can be filled completely resulting from the suppression of the back flow jet near the cavity side wall.

Original languageEnglish
Title of host publication2008 Proceedings of ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Pages435-444
Number of pages10
EditionPART A
DOIs
Publication statusPublished - 2009 Sep 15
Event2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008 - Boston, MA, United States
Duration: 2008 Oct 312008 Nov 6

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
NumberPART A
Volume10

Other

Other2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
CountryUnited States
CityBoston, MA
Period08/10/3108/11/6

ASJC Scopus subject areas

  • Mechanical Engineering

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