[TOPIC 01] : Flutter prediction and analysis
Flutter prediction and analysis
motivation :
Turbomachinery components are subject to interactions between aerodynamics and structural dynamics. The aero-structural system has aeroelastic eigenmodes, whose properties (e.g. damping) vary significantly with operating conditions. Aeroelastic eigenmodes can be unstable, leading to flutter and high-cycle fatigue. Flutter avoidance remains a challenge in turbomachinery design and validation.
topics of interest :
- Turbine airfoil flutter
- Flutter analysis and design criteria in high-speed Low-Pressure Turbines (LPT)
- Flutter in supersonic multistage turbines
- Turbine flutter of segmented sector structures (vane packets)
- Seal flutter
- Fan flutter
- High fidelity modeling for supersonic fan flutter
- ‘Flutter Bite’ (intake contribution to fan flutter) at part-speed and/or high-speed
- Acoustic flutter due to rotor/cavity interaction
- Flutter analysis and design methods
- Pre-conceptual flutter screening methods (low fidelity)
- Embedded blade row flutter analysis—applicable to multistage compressors
- AI/ML-based prediction of aero-damping
expected deliverables :
Deliverables may include the following, but other deliverables may be proposed.
- Description of design and/or analysis method and design sensitivity to flutter, including the impact of these designs on compressor performance
- Developed software tools, documentation, validation, and training material
- New insight into flutter mechanisms, conditions, mitigation strategies
- Measurements and experimental data and associated reports
- Damping identification and measurement- both opline and total damping
subtopics :
- Flutter analysis and design criteria in high-speed LPT
- Flutter in supersonic multistage turbines
- Seal flutter
- Fan flutter
- High fidelity modeling for supersonic fan flutter
- Pre-conceptual flutter screening methods (low-fidelity)
- Embedded blade row flutter analysis
- AI/ML-based prediction of aero-damping
- Acoustic flutter due to rotor/cavity interaction
- Turbine flutter of segmented sector structures (vane packets)
Other contributors to RfP
- Shreyas Hegde (Duke)
- Atsushi Tateishi (IHI)
- Mani Sadeghi (Pratt & Whitney)
- Jennifer Hall (Pratt & Whitney)
- Eijiro Kitamura (Honda)