Details
| Original language | English |
|---|---|
| Title of host publication | Structures and Dynamics |
| Publisher | American Society of Mechanical Engineers(ASME) |
| ISBN (electronic) | 9780791849842 |
| Publication status | Published - 20 Sept 2016 |
| Event | ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016 - Seoul, Korea, Republic of Duration: 13 Jun 2016 → 17 Jun 2016 |
Publication series
| Name | Proceedings of the ASME Turbo Expo |
|---|---|
| Volume | 7B-2016 |
Abstract
In jet engines, blade repair is often more economical than the replacement of damaged blades with spare parts. Besides such regeneration of turbine blades, blade rubbing and erosion lead to a deviation of the geometry in the tip region of the original blade. These geometric variations can introduce nonuniform flow conditions which in turn may lead to an excitation of the blades. An analysis of the aerodynamic excitation due to typical geometric variations of the radial tip gap, introduced through substantial wear, is numerically investigated using a fluid-structure interaction (FSI) approach. The model was previously validated against experimental data. The results of the analysis show up to 1.6 times higher excitation than in the reference case, because rotor blades are excited by the wakes of the stator vanes and are amplified by a modified tip flow in the rotor passage.
ASJC Scopus subject areas
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Structures and Dynamics. American Society of Mechanical Engineers(ASME), 2016. (Proceedings of the ASME Turbo Expo; Vol. 7B-2016).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Aerodynamic Excitation Analysis for Variable Tip Gap
AU - Hauptmann, Thomas
AU - Seume, Joerg R.
PY - 2016/9/20
Y1 - 2016/9/20
N2 - In jet engines, blade repair is often more economical than the replacement of damaged blades with spare parts. Besides such regeneration of turbine blades, blade rubbing and erosion lead to a deviation of the geometry in the tip region of the original blade. These geometric variations can introduce nonuniform flow conditions which in turn may lead to an excitation of the blades. An analysis of the aerodynamic excitation due to typical geometric variations of the radial tip gap, introduced through substantial wear, is numerically investigated using a fluid-structure interaction (FSI) approach. The model was previously validated against experimental data. The results of the analysis show up to 1.6 times higher excitation than in the reference case, because rotor blades are excited by the wakes of the stator vanes and are amplified by a modified tip flow in the rotor passage.
AB - In jet engines, blade repair is often more economical than the replacement of damaged blades with spare parts. Besides such regeneration of turbine blades, blade rubbing and erosion lead to a deviation of the geometry in the tip region of the original blade. These geometric variations can introduce nonuniform flow conditions which in turn may lead to an excitation of the blades. An analysis of the aerodynamic excitation due to typical geometric variations of the radial tip gap, introduced through substantial wear, is numerically investigated using a fluid-structure interaction (FSI) approach. The model was previously validated against experimental data. The results of the analysis show up to 1.6 times higher excitation than in the reference case, because rotor blades are excited by the wakes of the stator vanes and are amplified by a modified tip flow in the rotor passage.
UR - http://www.scopus.com/inward/record.url?scp=84991633851&partnerID=8YFLogxK
U2 - 10.1115/gt2016-57217
DO - 10.1115/gt2016-57217
M3 - Conference contribution
AN - SCOPUS:84991633851
T3 - Proceedings of the ASME Turbo Expo
BT - Structures and Dynamics
PB - American Society of Mechanical Engineers(ASME)
T2 - ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016
Y2 - 13 June 2016 through 17 June 2016
ER -