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Investigation of the two-phase flow field of the GTX100 compressor inlet during off-line washing

Engdar, Ulf LU ; Genrup, Magnus LU ; Orbay, Raik LU and Klingmann, Jens LU (2004) 2004 ASME Turbo Expo In ASME Turbo Expo 2004: Power for Land, Sea, and Air 4. p.509-518
Abstract
A modern gas turbine compressor, with its highly aerodynamically loaded blades, is sensitive to changes in profile shape and to surface roughness. Fouling is inevitable, despite highly efficient filtration systems. The remedy to this problem is washing. There are two different approaches, online or off-line washing. The off-line wash is the most effective one, whilst on-line washing only prolongs the interval between off-line washes. Most findings in this field are highly empirical, being based on some 50 years of industrial gas turbine operation. This paper is an investigation of the two-phase flow in the bellmouth of the compressor during off-line washing conditions. The unit under study was the GTX100 turbo-set. Computational fluid... (More)
A modern gas turbine compressor, with its highly aerodynamically loaded blades, is sensitive to changes in profile shape and to surface roughness. Fouling is inevitable, despite highly efficient filtration systems. The remedy to this problem is washing. There are two different approaches, online or off-line washing. The off-line wash is the most effective one, whilst on-line washing only prolongs the interval between off-line washes. Most findings in this field are highly empirical, being based on some 50 years of industrial gas turbine operation. This paper is an investigation of the two-phase flow in the bellmouth of the compressor during off-line washing conditions. The unit under study was the GTX100 turbo-set. Computational fluid dynamics (CFD) is used in this paper to perform a detailed study of the flow field. The main emphasis has been on studying the characteristics of the injected spray used for cleaning of the compressor. The benefit of heating this fluid is of special interest, since if this heating can be avoided, the outage time for the off-line compressor wash can be shortened. To provide the CFD computations with accurate boundary conditions for the spray, laser-based measurements of a spray, originating from an authentic wash nozzle, have been conducted. The commercial CFD program Star-Cd has been used for all computations. The computations show that the water injected, regardless of its inlet temperature, is cooled down to ambient air temperature well before the spray reaches the inlet guide vanes. This indicates that heating of the wash fluid can be abolished. The airflow seems not to be to influenced by the injected fluid to any great extend. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Filtration systems, Inlet guide vanes, Off-line compressors, Rinse cycles
in
ASME Turbo Expo 2004: Power for Land, Sea, and Air
volume
4
pages
10 pages
publisher
American Society Of Mechanical Engineers (ASME)
conference name
2004 ASME Turbo Expo
external identifiers
  • Scopus:10244250391
language
English
LU publication?
yes
id
677a701f-8fb8-47bd-a827-947cb214b699 (old id 613498)
date added to LUP
2007-11-26 18:10:58
date last changed
2017-02-19 04:30:54
@inproceedings{677a701f-8fb8-47bd-a827-947cb214b699,
  abstract     = {A modern gas turbine compressor, with its highly aerodynamically loaded blades, is sensitive to changes in profile shape and to surface roughness. Fouling is inevitable, despite highly efficient filtration systems. The remedy to this problem is washing. There are two different approaches, online or off-line washing. The off-line wash is the most effective one, whilst on-line washing only prolongs the interval between off-line washes. Most findings in this field are highly empirical, being based on some 50 years of industrial gas turbine operation. This paper is an investigation of the two-phase flow in the bellmouth of the compressor during off-line washing conditions. The unit under study was the GTX100 turbo-set. Computational fluid dynamics (CFD) is used in this paper to perform a detailed study of the flow field. The main emphasis has been on studying the characteristics of the injected spray used for cleaning of the compressor. The benefit of heating this fluid is of special interest, since if this heating can be avoided, the outage time for the off-line compressor wash can be shortened. To provide the CFD computations with accurate boundary conditions for the spray, laser-based measurements of a spray, originating from an authentic wash nozzle, have been conducted. The commercial CFD program Star-Cd has been used for all computations. The computations show that the water injected, regardless of its inlet temperature, is cooled down to ambient air temperature well before the spray reaches the inlet guide vanes. This indicates that heating of the wash fluid can be abolished. The airflow seems not to be to influenced by the injected fluid to any great extend.},
  author       = {Engdar, Ulf and Genrup, Magnus and Orbay, Raik and Klingmann, Jens},
  booktitle    = {ASME Turbo Expo 2004: Power for Land, Sea, and Air},
  keyword      = {Filtration systems,Inlet guide vanes,Off-line compressors,Rinse cycles},
  language     = {eng},
  pages        = {509--518},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {Investigation of the two-phase flow field of the GTX100 compressor inlet during off-line washing},
  volume       = {4},
  year         = {2004},
}