Advanced

AN EXPERIMENTAL AND NUMERICAL STUDY OF FLOW AND HEAT TRANSFER IN RIBBED CHANNELS WITH LARGE RIB PITCH-TO-HEIGHT RATIOS

Li, Shian LU ; Ghorbani-Tari, Zahra LU ; Xie, Gongnan and Sundén, Bengt LU (2013) In Journal of Enhanced Heat Transfer 20(4). p.305-319
Abstract
This paper presents an experimental and numerical study of flow and heat transfer char teristics in rectangular cross-section ribbed channels with continuous transverse ribs with large pitch-to-height ratios. Five ribs are regularly placed on the bottom wall of the channels with varied rib pitch-to-height ratios ranging from 10 to 30. The channel inlet Reynolds number ranges from 57,000 to 127,000 based on the channel hydraulic diameter. The studied geometry is relevant for hot internal structures in aircraft engines. In this study, the steady state, liquid crystal thermography (LCT) technique is used to obtain detailed heat transfer coefficients in the inter-rib surface regions. Then a computational fluid dynamics (CFD) technique based on... (More)
This paper presents an experimental and numerical study of flow and heat transfer char teristics in rectangular cross-section ribbed channels with continuous transverse ribs with large pitch-to-height ratios. Five ribs are regularly placed on the bottom wall of the channels with varied rib pitch-to-height ratios ranging from 10 to 30. The channel inlet Reynolds number ranges from 57,000 to 127,000 based on the channel hydraulic diameter. The studied geometry is relevant for hot internal structures in aircraft engines. In this study, the steady state, liquid crystal thermography (LCT) technique is used to obtain detailed heat transfer coefficients in the inter-rib surface regions. Then a computational fluid dynamics (CFD) technique based on the solution of the Reynolds-averaged Navier-Stokes (RANS) equations is employed to study flow and heat transfer characteristics in ribbed channels. The realizable k - epsilon turbulence model is used as the turbulence closure. The numerical results show a good agreement with the experimental data. An important purpose of this study is to investigate the flow and heat transfer behavior between the first repeated ribs, i.e., in the regions where the flow and thermal fields are not yet periodically fully developed. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cooling channel, heat transfer enhancement, rib turbulator, large, pitch-to-height ratio, liquid crystal thermography (LCT), numerical, simulation
in
Journal of Enhanced Heat Transfer
volume
20
issue
4
pages
305 - 319
publisher
Begell House
external identifiers
  • wos:000340978800002
  • scopus:84906666532
ISSN
1563-5074
DOI
10.1615/JEnhHeatTransf.2014010155
language
English
LU publication?
yes
id
f2f31ca9-30e3-4a0c-aaaf-3ad1056c9d47 (old id 4656023)
date added to LUP
2014-09-24 12:41:30
date last changed
2019-07-21 03:02:41
@article{f2f31ca9-30e3-4a0c-aaaf-3ad1056c9d47,
  abstract     = {This paper presents an experimental and numerical study of flow and heat transfer char teristics in rectangular cross-section ribbed channels with continuous transverse ribs with large pitch-to-height ratios. Five ribs are regularly placed on the bottom wall of the channels with varied rib pitch-to-height ratios ranging from 10 to 30. The channel inlet Reynolds number ranges from 57,000 to 127,000 based on the channel hydraulic diameter. The studied geometry is relevant for hot internal structures in aircraft engines. In this study, the steady state, liquid crystal thermography (LCT) technique is used to obtain detailed heat transfer coefficients in the inter-rib surface regions. Then a computational fluid dynamics (CFD) technique based on the solution of the Reynolds-averaged Navier-Stokes (RANS) equations is employed to study flow and heat transfer characteristics in ribbed channels. The realizable k - epsilon turbulence model is used as the turbulence closure. The numerical results show a good agreement with the experimental data. An important purpose of this study is to investigate the flow and heat transfer behavior between the first repeated ribs, i.e., in the regions where the flow and thermal fields are not yet periodically fully developed.},
  author       = {Li, Shian and Ghorbani-Tari, Zahra and Xie, Gongnan and Sundén, Bengt},
  issn         = {1563-5074},
  keyword      = {cooling channel,heat transfer enhancement,rib turbulator,large,pitch-to-height ratio,liquid crystal thermography (LCT),numerical,simulation},
  language     = {eng},
  number       = {4},
  pages        = {305--319},
  publisher    = {Begell House},
  series       = {Journal of Enhanced Heat Transfer},
  title        = {AN EXPERIMENTAL AND NUMERICAL STUDY OF FLOW AND HEAT TRANSFER IN RIBBED CHANNELS WITH LARGE RIB PITCH-TO-HEIGHT RATIOS},
  url          = {http://dx.doi.org/10.1615/JEnhHeatTransf.2014010155},
  volume       = {20},
  year         = {2013},
}