Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | ASME 2011 Turbo Expo |
| Untertitel | Turbine Technical Conference and Exposition, GT2011 |
| Seiten | 1197-1208 |
| Seitenumfang | 12 |
| Auflage | PARTS A, B, AND C |
| Publikationsstatus | Veröffentlicht - 3 Mai 2012 |
| Veranstaltung | ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition, GT2011 - Vancouver, BC, Kanada Dauer: 6 Juni 2011 → 10 Juni 2011 |
Publikationsreihe
| Name | Proceedings of the ASME Turbo Expo |
|---|---|
| Nummer | PARTS A, B, AND C |
| Band | 7 |
Abstract
Steady blowing vortex generating jets (VGJ) on highlyloaded low-pressure turbine profiles have shown to be a promising way to decrease total pressure losses at low Reynoldsnumbers by reducing laminar separation. In the present paper, the state of the art turbomachinery design code TRACE with RANS turbulence closure and coupled γ-ReΘ transition model is applied to the prediction of typical aerodynamic design parameters of various VGJ configurations in steady simulations. High-speed cascade wind tunnel experiments for a wide range of Reynolds-numbers, two VGJ positions, and three jet blowing ratios are used for validation. Since the original transition model overpredicts separation and losses at Re2is ≤ 100 · 10 3 an extra mode for VGJ induced transition is introduced. Whereas the criterion for transition is modelled by a filtered Q vortex criterion the transition development itself is modelled by a reduction of the local transition-onset momentum-thickness Reynolds number. The new model significantly improves the quality of the computational results by capturing the corresponding local transition process in a physically reasonable way. This is shown to yield an improved quantitative prediction of surface pressure distributions and total pressure losses.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Allgemeiner Maschinenbau
Zitieren
- Standard
- Harvard
- Apa
- Vancouver
- BibTex
- RIS
ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition, GT2011. PARTS A, B, AND C. Aufl. 2012. S. 1197-1208 (Proceedings of the ASME Turbo Expo; Band 7, Nr. PARTS A, B, AND C).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Transition Modelling for Vortex Generating Jets on Low-Pressure Turbine Profiles
AU - Herbst, Florian
AU - Kožulović, Dragan
AU - Seume, Joerg R.
PY - 2012/5/3
Y1 - 2012/5/3
N2 - Steady blowing vortex generating jets (VGJ) on highlyloaded low-pressure turbine profiles have shown to be a promising way to decrease total pressure losses at low Reynoldsnumbers by reducing laminar separation. In the present paper, the state of the art turbomachinery design code TRACE with RANS turbulence closure and coupled γ-ReΘ transition model is applied to the prediction of typical aerodynamic design parameters of various VGJ configurations in steady simulations. High-speed cascade wind tunnel experiments for a wide range of Reynolds-numbers, two VGJ positions, and three jet blowing ratios are used for validation. Since the original transition model overpredicts separation and losses at Re2is ≤ 100 · 10 3 an extra mode for VGJ induced transition is introduced. Whereas the criterion for transition is modelled by a filtered Q vortex criterion the transition development itself is modelled by a reduction of the local transition-onset momentum-thickness Reynolds number. The new model significantly improves the quality of the computational results by capturing the corresponding local transition process in a physically reasonable way. This is shown to yield an improved quantitative prediction of surface pressure distributions and total pressure losses.
AB - Steady blowing vortex generating jets (VGJ) on highlyloaded low-pressure turbine profiles have shown to be a promising way to decrease total pressure losses at low Reynoldsnumbers by reducing laminar separation. In the present paper, the state of the art turbomachinery design code TRACE with RANS turbulence closure and coupled γ-ReΘ transition model is applied to the prediction of typical aerodynamic design parameters of various VGJ configurations in steady simulations. High-speed cascade wind tunnel experiments for a wide range of Reynolds-numbers, two VGJ positions, and three jet blowing ratios are used for validation. Since the original transition model overpredicts separation and losses at Re2is ≤ 100 · 10 3 an extra mode for VGJ induced transition is introduced. Whereas the criterion for transition is modelled by a filtered Q vortex criterion the transition development itself is modelled by a reduction of the local transition-onset momentum-thickness Reynolds number. The new model significantly improves the quality of the computational results by capturing the corresponding local transition process in a physically reasonable way. This is shown to yield an improved quantitative prediction of surface pressure distributions and total pressure losses.
UR - http://www.scopus.com/inward/record.url?scp=84865526005&partnerID=8YFLogxK
U2 - 10.1115/GT2011-45621
DO - 10.1115/GT2011-45621
M3 - Conference contribution
AN - SCOPUS:84865526005
SN - 9780791854679
T3 - Proceedings of the ASME Turbo Expo
SP - 1197
EP - 1208
BT - ASME 2011 Turbo Expo
T2 - ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition, GT2011
Y2 - 6 June 2011 through 10 June 2011
ER -