Particle behavior in supersonic flow during the cold spray process

Autor:	Sung Ho Cho, Hyungjun Kim, Eui Hyuk Kwon, Changhee Lee, Jeong Whan Han
Rok vydání:	2005
Předmět:	Jet (fluid) Materials science Nozzle Metals and Alloys Gas dynamic cold spray Analytical chemistry Mechanics Condensed Matter Physics Discharge coefficient Ultrasonic nozzle Spray nozzle Physics::Fluid Dynamics Mechanics of Materials Materials Chemistry Particle velocity Choked flow
Zdroj:	Metals and Materials International. 11:377-381
ISSN:	1598-9623
DOI:	10.1007/bf03027508
Popis:	The cold spray process is a relatively new process that uses high velocity metallic particles for surface modifications. Metallic powder particles are injected into a converging-diverging nozzle and accelerated to supersonic velocities. In this study two-dimensional temperature and velocitiy distributions of gas along the nozzle axis are calculated and the effects of gas pressure and temperature on particle velocities and temperature inside and outside the nozzle are investigated. It was found that acceleration of the gas velocity takes place in the area of the nozzle throat, and it increases and reaches a maximum value at the nozzle exit. Due to compression shocks, irregular changes of the gas jet properties were found in the area after the nozzle and these resulted in the experience of the maximum particle velocity by the change of the particle size at a given gas pressure and temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d6cb5ec4017e0a011a19e481724281cb https://doi.org/10.1007/bf03027508 Zobrazit plný text záznamu Full text from SpringerLink