AAE517_Presentation[1] - Vortex Source : Wing Rotation and...

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Click to edit Master subtitle style 10/25/10 NATURES UNSTEADINESS Kevin Fernandes Hwan Song 11
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10/25/10 OUTLINE Motivation Basic introduction into insect flight Unsteady effects encountered Fluent set up Results Discussion 22
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10/25/10 Motivation MAVs (Micro Air Vehicles) Understanding Insect Aerodynamics gives a good idea about MAVs 33
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10/25/10 OVERVIEW OF INSECT FLIGHT Translational Phases Upstroke Downstroke Rotational Phases Pronation Supination Source : Wing Rotation and the Aerodynamic Basic of Insect Flight by S.P.Sane 44
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10/25/10 BASIC AERODYNAMICS Leading edge Vortex Steady state aerodynamic force Wing contact with previous wake 55
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10/25/10 UNSTEADY EFFECTS Wagner Effect Source : Wing Rotation and the Aerodynamic Basic of Insect Flight by S.P.Sane 66
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10/25/10 UNSTEADY EFFECTS Source : Wing Rotation and the Aerodynamic Basic of Insect Flight by S.P.Sane 77
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10/25/10 UNSTEADY EFFECTS Delayed Stall and the Leading Edge
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Unformatted text preview: Vortex Source : Wing Rotation and the Aerodynamic Basic of Insect Flight by S.P.Sane 88 10/25/10 Initial set-up Basic dimensions of the wing Chord Length : 5mm (0.005m) Half Span : 2cm (0.02m) Free Stream Velocity : 1m/s Density : 1kg/(m^3) Reynolds Number : = 200 Viscosity = 1.7e-5 kg/ms Reduced Frequency : k = = 0.6 = 10*pi Hz b = 2cm (0.02m) 99 10/25/10 Gambit Set Up Figure 1. Grid in Gambit Figure 2. Grid in Gambit II 10 10/25/10 Result & Discussion at Negative Cl Figure 1. Cl vs Flow Time (Negative Cl) Figre 2. Pressure Contour Figure 3. Velocity Vector I Figure 4. Velocity Vector II 11 10/25/10 Result & Disussion at Positive Cl Figure 1. Cl vs Flow Time (Positive Cl) Figure 2. Pressure Contour Figure 3. Velocity Vector I Figure 4. Velocity Vector II 12 10/25/10 Questions?? 13...
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AAE517_Presentation[1] - Vortex Source : Wing Rotation and...

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