1. NASA Green Aviation Challenge
David Axel Virzi
Marina Correia
William Tejada

2. The Challenge
Design non-conventional aircraft to assist in the goals set forth in the NASA metrics below
Noise reduction, reduced fuel consumption, and weight reduction

3. Problem Statement Aerodynamic design of a 200 passenger aircraft for
Drag reduction
Reduced fuel consumption
Lower acoustic signature
Weight reduction
Incorporation of co-flow jet on a morphing wing to assist in aforementioned requirements by
Increased laminar flow
Adaptability to various flight conditions
Reduction of mechanical components

4. Conventional Aircraft
Tube design is not the most aerodynamically efficient design
Design features several surfaces such as the vertical and horizontal stabilizers that increase the overall drag of the aircraft
Passenger and cargo limitations – large aircraft such as the Boeing 747 and Airbus A380 feature tall designs that induce a lot of drag

5. Airframe Design Comparison
Type of Design
Drag Coefficient
Lift Coefficient
Fuel Efficiency
Acoustic Signature
Maneuverability
Cargo Area
Conventional Aircraft
Canard
Blended Wing Body
Flying Wing
(A star signifies an option that best fits that category)
Canard Design
Flying Wing Design

6. Blended Wing Body Design
BWB designs feature lower drag coefficients and higher lift coefficients than conventional passenger aircraft designs
Unconventional designs can carry 800 passengers while using 20-25% less fuel

7. Conventional Wings
Conventional wings on passenger aircraft contain thousands of moving parts that add weight and contribute to difficulty in maintenance
Control surfaces needed to control the aircraft cannot adapt to different flight conditions
Current control surfaces disrupt smooth airflow

8. Morphing Wings Can compensate for various flight stages
Smoothly redirect airflow with minimal turbulence and drag
Overall weight can be reduced through elimination of excessive mechanical parts
In conjunction with carbon fiber reinforced composites, wings can be designed to deform to their desired shape

9. Actuation Design Alternatives
Method
Comments
Shape Memory Alloy
Easy shape design, low power required
Piezo-electric
Can be very small, high voltage required
Electromagnetic
Relatively large, require high force
Servo
Cheap, weak force for actuation
Shape Memory Alloy
Piezo-Electric Actuation

10. Co-Flow Jet
CFJ flow control significantly enhances properties of lift and drag
Maintaining attached flow reduces fuel consumption and noise emissions

11. Performance Metrics Flight Condition Altitude Velocity Metric Take off
Sea Level
0 - VLO
Min Accel. Time
Climb 1
Vbest rate of climb
Max R.O.C.
Climb 2
30,000 ft
Cruise 1
Vbest range
Max Range
Cruise 2
Acceleration
M = 0.5
Max Accel.
Instant Turn
Corner Speed
Max Turn Rate
Sustained Turn
Vbest turn rate
Landing
Vapproach
Min Power

12. Timeline

13. The End
Questions?