Phase II Final Report - NASA's Institute for Advanced Concepts

Chapter 3.0 Vehicle Design
3.3 Wing Aerodynamics
3
2.5
2
1.5
Coefficient of Lift (CL)
1
0.5
0
0.000 0.020 0.040 0.060 0.080 0.100 0.120 0.140 0.160 0.180
-0.5
Case22
Case21
-1
-1.5
-2
-2.5
Time (t) in secs
Figure 3-129: Variation of Lift Coefficient with Forward Velocity
Figure 3-129 shows that the net lift coefficient will stay almost the same, for variation in
velocity; however, the lift force will increase proportional to the square of velocity.
c. Keeping all variables the same and just changing the flapping frequency results in that
which is depicted in Case 23 and Case 24 of the design-of-experiments array. The results
are shown in Figure 3-130.
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