Propellers TRIZ Cases
- Rotorcraft Blade Dynamics Isolation via Hub-Blade Sensor Fusion
A rotorcraft control system fuses hub and blade sensor data to isolate specific blade dynamics from fuselage maneuvering motions.
- Turbomachine Leading Edge Sweep Profile Design
Continuous mathematical functions define the leading edge sweep profile, eliminating flow discontinuities and boundary layer separation in turbomachinery.
- Wind Turbine Rotor Blade Shape Adaptation
A rotor blade with a compliant region bends under centrifugal force to optimize its aerodynamic profile.
- Wind Wheel Shaft Sleeve Connecting Structure for Blower Alignment
Convex bottom plate on shaft sleeve guides motor shaft perpendicular insertion, preventing installation slant and dynamic imbalance in blowers.
- Wind Turbine Pitch Control for Overspeed Prevention
Estimating overspeed via rotor speed and rate of change reduces transient loads and prevents resonant vibrations.
- Ducted Fan Casing Over-Rotor Cavity for Tip Vortex Control
An annular recess in the fan casing redirects tip clearance flow and vortices, reducing boundary layer disruption and improving hover stability.
- Unbalanced Spar Layup for Propeller Blade Thermal Stress
Asymmetrical spar layup reduces thermal expansion mismatch in propeller blades.
- Rotor Blade Trailing Edge Assembly with Varying Cross-Section
A composite trailing edge assembly with a varying cross-section integrates into turbine rotor blades to enhance structural integrity.
- Torque-Sensitive Locking Mechanism for Bistable Pitch Propellers
A torque-sensitive clutch module with detents and springs locks a bistable pitch propeller, replacing RPM switching to maintain natural flight patterns.
- Wrinkle-Preventing Interlayer for Fibre Reinforced Laminate
Stiff intermediary layers confine wrinkles in fibre reinforced laminates, maintaining mechanical strength without complex process control.
- Wind Turbine Blade Pitch Control for Load Reduction
Independent blade pitch control adjusts aerodynamic lift to manage mechanical stress on wind turbine components during operation.
- Turbine Blade Platform Undercut for Stress Reduction
A compound fillet undercut in the turbine blade platform redirects stress loads away from the airfoil trailing edge joint.
- Dual Rotor Shrouded Thrust Unit for Drag Reduction
Segmented rotor assemblies with selective shrouding reduce drag in transversal flow while maintaining axial efficiency.
- Transonic Rotor Blade Noise Reduction via Local Quality
Local quality modifications to the airfoil section reduce supersonic shock strength while maintaining high-speed aerodynamic efficiency.
- Variable Diameter Downstream Propeller for CROF Noise Reduction
Electric motors adjust downstream propeller diameter to reduce takeoff noise while maintaining cruise thrust and aerodynamic efficiency.
- Turbojet Rotor Balancing Weight with Integrated Peg Lock
An integrated locking peg eliminates nut-tightening space, reducing axial size and weight while securing the rotor.
- Non-intrusive Blade Pitch Measurement Using Optical Markers
Optical acquisition device captures visual marker patterns to deduce blade pitch angles.
- Centerline Hydraulic Pitch Actuator for Fan Blade Stability
A centerline-mounted hydraulic actuator angularly displaces fan blades to enable uniform pitch adjustment across the assembly.
- Flexible Stirrer Tool with Radial and Distal Projections
Radial and distal flexible projections reach container corners to dislodge sediment without damaging walls.
- Monolithic Hub Fitting for Ducted-Rotor Aircraft
Integrating stator supports and motor mounts into a monolithic hub fitting reduces weight and stress by eliminating separate joints.
- Modular Counter-Rotating Propeller System Integration
A self-contained counter rotating propeller system uses a separate gear train for independent blade rotation.