A numerical analysis of transpiration cooling as an air cooling mechanism
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Tarih
2018
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The present study is focused on investigation of heat transfer from a porous plate by cooling of air with transpiration cooling. Effects of Reynolds number of hot gas stream, inlet temperature of air and mass flow rate of water on local wall temperature and cooling effectiveness of porous flat plate and efficiency of the system inside a rectangular channel with air as a hot gas stream and water as a coolant were investigated numerically. Increasing Reynolds number causes an increase on surface temperature and a decrease on cooling effectiveness of porous plate and efficiency of the system. Increasing of air inlet temperature does not cause a significant increase on cooling efficiency of the system. An increase of water flow rate causes a decrease on surface temperature and an increase on effectiveness of porous plate and cooling efficiency of the system. Numerical results prepared by RNG k-epsilon turbulence model have a good approximation and show a similar flow characteristic with experimental results.
Açıklama
Anahtar Kelimeler
Computational fluid dynamics, Heat transfer, Navier-stokes-equation, RNG k-epsilon model, Structured surface, Transpiration cooling
Kaynak
Heat and Mass Transfer
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
54
Sayı
12
