Supersonic Nozzle Flow Simulations for Particle Coating Applications: Effects of Shockwaves, Nozzle Geometry, Ambient Pressure, and Substrate Location upon Flow Characteristics
- Authors
- Park, Jung-Jae; Lee, Min-Wook; Yoon, Sam S.; Kim, Ho-Young; James, Scott C.; Heister, Stephen D.; Chandra, Sanjeev; Yoon, Woon-Ha; Park, Dong-Soo; Ryu, Jungho
- Issue Date
- 3월-2011
- Publisher
- SPRINGER
- Keywords
- nano-particle coating; nozzle optimization; shockwave; supersonic flow; thin-film deposition
- Citation
- JOURNAL OF THERMAL SPRAY TECHNOLOGY, v.20, no.3, pp.514 - 522
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THERMAL SPRAY TECHNOLOGY
- Volume
- 20
- Number
- 3
- Start Page
- 514
- End Page
- 522
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112888
- DOI
- 10.1007/s11666-010-9542-8
- ISSN
- 1059-9630
- Abstract
- Characteristics of supersonic flow are examined with specific regard to nano-particle thin-film coating. Effects of shockwaves, nozzle geometry, chamber pressure, and substrate location were studied computationally. Shockwaves are minimized to reduce fluctuations in flow properties at the discontinuities across diamond shock structures. Nozzle geometry was adjusted to ensure optimal expansion (i.e., P(exit) = P(ambient)), where shock formation was significantly reduced and flow kinetic energy maximized. When the ambient pressure was reduced from 1 to 0.01316 bar, the nozzle's diverging angle must be increased to yield the optimum condition of minimized adversed effects. Beyond some critical distance, substrate location did not seem to be a sensitive parameter on flow characteristics when P(amb) = 0.01316 bar; however, overly close proximity to the nozzle exit caused flow disturbances inside the nozzle, thereby adversely affecting coating gas flow.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholar.korea.ac.kr/handle/2021.sw.korea/112888)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.