Accomplishments: Army Technology Barrier Problems
Black Hawk Airloads
Using CFD + Comprehensive
Rotor Analysis:
- Lift Phase error resolved
- Vibratory air loads resolved
- Transonic pitching moments captured
- High thrust condition resolved
Issues under investigation
- Maneuvering flights
Collaboration:
- NASA, Army & Industry
Technology Barrier Problems (2000-2007)
- Rotor loads prediction: Resolving phase issue for predicted vs measured loads
(Collaboration with NASA, Army & Industry) - Composite rotor blade modeling: adequate coupled beam modeling, comprehensive
aeromechanics analysis and unique vacuum chamber and wind tunnel test data - Active vibration control (HHC & IBC) coupling with flight control stability (issue with
hingeless and bearingless rotors) - Power minimization with 2/rev active pitch input: expect nominal gain less than 5%
- Smart rotor development: smart actuator stroke limitation and innovative amplification
- Rotor wakes: resolving vortex core issue and its interaction, precise model under
steady flight condition - Rotor wakes in maneuvering flight: Time domain non-steady model and resolving offaxes response issues
- Unsteady aerodynamics of flapping rotor
- CFD couplings with comprehensive aeroelastic analyses: issue of moment coupling
- HUMS for transmissions & drive-trains: Robust ID schemes to overcome false alarms
- Comprehensive aeromechanics analyses for advanced rotor systems: bearingless
(multiple load paths), tiltrotor, circulation-control, trailing-flap and smart rotor - Flight stability and acoustics analysis in maneuvering flight
RCOEs Accomplishments:
Technology Barrier Problems
RCOEs Accomplishments:
Army Technology Barrier Problems
Major Accomplishments over past 25 years:
Research
Projects | Research | Technology Transfers | Example1 | Example2 | Example3
