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Numerical and experimental study of the slot film cooling jet with various angles

Jia, Rongguang LU ; Sundén, Bengt LU ; Miron, Petre and Leger, Bruno (2003) ASME Summer Heat Transfer Conference (HT2003), 2003 In Proceedings of the ASME Summer Heat Transfer Conference 2003. p.845-856
Abstract
Numerical simulations coupled with LDV experiments were carried out to investigate a slot jet issued into a cross flow, which is relevant in the film cooling of gas turbine combustors. The film cooling fluid injection from slots or holes into a cross-flow produces highly complicated flow fields. In this paper, the time-averaged Navier-Stokes equations were solved on a collocated body-fitted grid system with the V2F turbulence model. The fluid flow and turbulent Reynolds stress fields were compared with the LDV experiments for three jet angles, namely, 30-deg, 60-deg, and 90-deg, and the jet blowing ratio is ranging from 2 to 9. Good agreement was obtained. Therefore, the present solution procedure was also adopted to calculations of 15-deg... (More)
Numerical simulations coupled with LDV experiments were carried out to investigate a slot jet issued into a cross flow, which is relevant in the film cooling of gas turbine combustors. The film cooling fluid injection from slots or holes into a cross-flow produces highly complicated flow fields. In this paper, the time-averaged Navier-Stokes equations were solved on a collocated body-fitted grid system with the V2F turbulence model. The fluid flow and turbulent Reynolds stress fields were compared with the LDV experiments for three jet angles, namely, 30-deg, 60-deg, and 90-deg, and the jet blowing ratio is ranging from 2 to 9. Good agreement was obtained. Therefore, the present solution procedure was also adopted to calculations of 15-deg and 40-deg jets. In addition, the temperature fields, which were difficult to measure by experimental methods, were also computed with a simple eddy diffusivity model to obtain the film cooling effectiveness which was used for evaluation of the various jet-cross-flow arrangements. The results show that a recirculation bubble downstream the jet exists for jet angles larger than 40-deg, but it vanishes when the angle is less than 30-deg, which is in good accordance with the experiments. The blowing ratio has a large effect on the size of the recirculation bubble, and consequently on the film cooling effectiveness. In addition, the influence of boundary conditions for the jet and cross-flow are also addressed in the paper. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Slot film cooling, Recirculation bubbles
in
Proceedings of the ASME Summer Heat Transfer Conference
volume
2003
pages
845 - 856
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME Summer Heat Transfer Conference (HT2003), 2003
external identifiers
  • scopus:1842640018
ISBN
0791836959
language
English
LU publication?
yes
id
360b8e01-9029-4ba1-a3a5-d93ebccc5d6b (old id 612412)
date added to LUP
2007-11-30 10:36:21
date last changed
2017-01-01 08:06:46
@inproceedings{360b8e01-9029-4ba1-a3a5-d93ebccc5d6b,
  abstract     = {Numerical simulations coupled with LDV experiments were carried out to investigate a slot jet issued into a cross flow, which is relevant in the film cooling of gas turbine combustors. The film cooling fluid injection from slots or holes into a cross-flow produces highly complicated flow fields. In this paper, the time-averaged Navier-Stokes equations were solved on a collocated body-fitted grid system with the V2F turbulence model. The fluid flow and turbulent Reynolds stress fields were compared with the LDV experiments for three jet angles, namely, 30-deg, 60-deg, and 90-deg, and the jet blowing ratio is ranging from 2 to 9. Good agreement was obtained. Therefore, the present solution procedure was also adopted to calculations of 15-deg and 40-deg jets. In addition, the temperature fields, which were difficult to measure by experimental methods, were also computed with a simple eddy diffusivity model to obtain the film cooling effectiveness which was used for evaluation of the various jet-cross-flow arrangements. The results show that a recirculation bubble downstream the jet exists for jet angles larger than 40-deg, but it vanishes when the angle is less than 30-deg, which is in good accordance with the experiments. The blowing ratio has a large effect on the size of the recirculation bubble, and consequently on the film cooling effectiveness. In addition, the influence of boundary conditions for the jet and cross-flow are also addressed in the paper.},
  author       = {Jia, Rongguang and Sundén, Bengt and Miron, Petre and Leger, Bruno},
  booktitle    = {Proceedings of the ASME Summer Heat Transfer Conference},
  isbn         = {0791836959},
  keyword      = {Slot film cooling,Recirculation bubbles},
  language     = {eng},
  pages        = {845--856},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {Numerical and experimental study of the slot film cooling jet with various angles},
  volume       = {2003},
  year         = {2003},
}