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Computational analysis of heat transfer enhancement in square ducts with V-shaped ribs: Turbine blade cooling

Jia, Rongguang LU ; Sundén, Bengt LU and Faghri, M (2005) In Journal of Heat Transfer 127(4). p.425-433
Abstract
Experimental studies have revealed that both downstream and upstream pointing V-shaped ribs result in more heat transfer enhancement than transverse straight ribs in ducts. However, based on the available experimental results, contradiction exists whether the upstream or the downstream pointing V-shaped ribs orientation is superior for better enhancement in heat transfer. Further investigations are thus needed concerning the heat transfer and fluid flow phenomena in ducts with V-shaped ribs to clarify this. In the present investigation a numerical approach is taken and the heat and fluid flow is numerically simulated by a multi-block parallel 3D solver For turbulence modeling, the (v(2)) over bar f-k epsilon model is employed but results... (More)
Experimental studies have revealed that both downstream and upstream pointing V-shaped ribs result in more heat transfer enhancement than transverse straight ribs in ducts. However, based on the available experimental results, contradiction exists whether the upstream or the downstream pointing V-shaped ribs orientation is superior for better enhancement in heat transfer. Further investigations are thus needed concerning the heat transfer and fluid flow phenomena in ducts with V-shaped ribs to clarify this. In the present investigation a numerical approach is taken and the heat and fluid flow is numerically simulated by a multi-block parallel 3D solver For turbulence modeling, the (v(2)) over bar f-k epsilon model is employed but results from previous EASM calculations are also considered in analyzing and attempting to understand the various expert. mental data. Large eddy simulations (LES) are also carried to evaluate the accuracy and reliability of the results of Reynolds-averaged Navier-Stokes (RANS) methods and to understand the underlying physical phenomena. It is suggested that the discrepancy between the various experiments most probably is due to the measurement methods, or the number of sampling points. With the TC (thermocouples) technique, a few sampling points are not sufficient to represent the heat transfer behavior in V-shaped ribs, due to the uneven distribution of the heat transfer coefficients. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Heat Transfer
volume
127
issue
4
pages
425 - 433
publisher
American Society Of Mechanical Engineers (ASME)
external identifiers
  • wos:000228754600009
  • scopus:18844407340
ISSN
0022-1481
DOI
10.1115/1.1865220
language
English
LU publication?
yes
id
4e142d6a-6ef8-4e95-91ac-b114f0c199e0 (old id 244364)
date added to LUP
2007-08-07 14:37:05
date last changed
2017-09-10 04:42:44
@article{4e142d6a-6ef8-4e95-91ac-b114f0c199e0,
  abstract     = {Experimental studies have revealed that both downstream and upstream pointing V-shaped ribs result in more heat transfer enhancement than transverse straight ribs in ducts. However, based on the available experimental results, contradiction exists whether the upstream or the downstream pointing V-shaped ribs orientation is superior for better enhancement in heat transfer. Further investigations are thus needed concerning the heat transfer and fluid flow phenomena in ducts with V-shaped ribs to clarify this. In the present investigation a numerical approach is taken and the heat and fluid flow is numerically simulated by a multi-block parallel 3D solver For turbulence modeling, the (v(2)) over bar f-k epsilon model is employed but results from previous EASM calculations are also considered in analyzing and attempting to understand the various expert. mental data. Large eddy simulations (LES) are also carried to evaluate the accuracy and reliability of the results of Reynolds-averaged Navier-Stokes (RANS) methods and to understand the underlying physical phenomena. It is suggested that the discrepancy between the various experiments most probably is due to the measurement methods, or the number of sampling points. With the TC (thermocouples) technique, a few sampling points are not sufficient to represent the heat transfer behavior in V-shaped ribs, due to the uneven distribution of the heat transfer coefficients.},
  author       = {Jia, Rongguang and Sundén, Bengt and Faghri, M},
  issn         = {0022-1481},
  language     = {eng},
  number       = {4},
  pages        = {425--433},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  series       = {Journal of Heat Transfer},
  title        = {Computational analysis of heat transfer enhancement in square ducts with V-shaped ribs: Turbine blade cooling},
  url          = {http://dx.doi.org/10.1115/1.1865220},
  volume       = {127},
  year         = {2005},
}