TY - JOUR
T1 - Heat transfer enhancement by shot peening of stainless steel
AU - Koowattanasuchat, Pramote
AU - Mahayotsanun, Numpon
AU - Sucharitpwatskul, Sedthawatt
AU - Mahabunphachai, Sasawat
AU - Dohda, Kuniaki
N1 - Funding Information:
Funding: This research was funded by the NSTDA University-Industry Research Collaboration (NUI-RC), grant number NUI-RC-M33-12-56-002D. The APC was funded by Khon Kaen University.
Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2020/6
Y1 - 2020/6
N2 - In heat exchange applications, the heat transfer efficiency could be improved by surface modifications. Shot peening was one of the cost-effective methods to provide different surface roughness. The objectives of this study were (1) to investigate the influences of the surface roughness on the heat transfer performance and (2) to understand how the shot peening process parameters affect the surface roughness. The considered specimens were 316L stainless steel hollow tubes having smooth and rough surfaces. The computational fluid dynamics (CFD) simulation was used to observe the surface roughness effects. The CFD results showed that the convective heat transfer coefficients had linear relationships with the peak surface roughness (Rz). Finite element (FE) simulation was used to determine the effects of the shot peening process parameters. The FE results showed that the surface roughness was increased at higher sandblasting speeds and sand diameters.
AB - In heat exchange applications, the heat transfer efficiency could be improved by surface modifications. Shot peening was one of the cost-effective methods to provide different surface roughness. The objectives of this study were (1) to investigate the influences of the surface roughness on the heat transfer performance and (2) to understand how the shot peening process parameters affect the surface roughness. The considered specimens were 316L stainless steel hollow tubes having smooth and rough surfaces. The computational fluid dynamics (CFD) simulation was used to observe the surface roughness effects. The CFD results showed that the convective heat transfer coefficients had linear relationships with the peak surface roughness (Rz). Finite element (FE) simulation was used to determine the effects of the shot peening process parameters. The FE results showed that the surface roughness was increased at higher sandblasting speeds and sand diameters.
KW - Heat transfer
KW - Shot peening
KW - Stainless steel
KW - Surface roughness
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U2 - 10.3390/coatings10060584
DO - 10.3390/coatings10060584
M3 - Article
AN - SCOPUS:85096236105
SN - 2079-6412
VL - 10
SP - 1
EP - 15
JO - Coatings
JF - Coatings
IS - 6
M1 - 584
ER -