Sökning: WFRF:(Szasz C.)
> (2005-2009) >
Large Eddy simulati...
Large Eddy simulation of a swirling flame response to swirl modulation with impact on combustion stability
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- Duwig, Christophe (författare)
- Lund University,Lunds universitet,Strömningsteknik,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Fluid Mechanics,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH
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- Szász, Robert-Zoltán (författare)
- Lund University,Lunds universitet,Strömningsteknik,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Fluid Mechanics,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH
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- Fuchs, Laszlo (författare)
- Lund University,Lunds universitet,Strömningsteknik,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Fluid Mechanics,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH
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visa fler...
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Troger, C (författare)
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visa färre...
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(creator_code:org_t)
- 2005
- 2005
- Engelska.
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Ingår i: 43rd AIAA Aerospace Sciences Meeting and Exhibit - Meeting Papers. ; , s. 4929-4940
- Relaterad länk:
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https://lup.lub.lu.s...
Abstract
Ämnesord
Stäng
- A swirl stabilized flame has been studied numerically using Large Eddy Simulation. The response of the flame to a large swirl number modulation has as been determined. Decreasing the swirl number moderately does not destabilize the flame. Decreasing further the swirl number induces a transition from stabilized to a jet flame with increase in the flame fluctuations. Increasing back the swirl restores the original configuration. However, the re-stabilization has been found to be considerably slower as compared to the burner aerodynamic time scale. Further studies, including identification of some characteristic turbulent structures, have been carried out. Both a helical and an axial mode have been identified. The helical mode arises in the central recirculation zone, whereas the axial mode arises in the outer shear-layer. Both modes are possible sources of thermo-acoustic instabilities.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- Swirl modulation
- Swirl number
- Large Eddy simulation (LES)
- Swirling flame
Publikations- och innehållstyp
- kon (ämneskategori)
- ref (ämneskategori)