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

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Planetary Exploration Using Biomimetics An Entomopter for Flight on Mars Figure 3-25: CAD Wing Section for the Hollow, Tapered Baseline Geometry--Root to Tip from Wing Top Figure 3-26: CAD Wing Section for the Hollow, Tapered Baseline Geometry - Top View 64 Phase II Final Report
Chapter 3.0 Vehicle Design 3.3 Wing Aerodynamics Figure 3-27: CAD Wing Section for the Hollow, Tapered Baseline Geometry--Leading Edge View 3.3 Wing Aerodynamics 3.3.1 Computational Fluid Dynamics 3.3.1.1 Introduction Low Reynolds number, unsteady aerodynamics of thin cambered wings is of current interest because of technological applications such as micro air vehicles (MAV). High lift associated with insect flight, not predicted by conventional quasi-steady aerodynamics, has been a fascinating subject for many researchers. Several mechanisms, such as the “clap-and-fling” (Weis-Fogh mechanism) and the “delayed-stall-rotational-lift-wake-capture” (Dickinson mechanism), have been proposed to explain how lift is generated during the cyclic motion of the insect wing. Forward flight, requiring both lift and thrust, has been more easily analyzed than hovering flight. Studies on tethered live animals have been conducted to measure forces and visualize flow patterns. Experimental studies using models with basic wing kinematics, such as heaving, flapping, and pitching, have also been undertaken [115, 129]. Gaining a thorough understanding of insect wing aerodynamics and incorporating their desirable features into MAV design have become one of the critical technologies of MAV development. In this work, we use computational fluid dynamics (CFD) tools to simulate low Reynolds number, unsteady aerodynamics that incorporate geometries and kinematics representative of insect wings. Leading edge vortex (LEV) dynamics, span-wise flow features, and dynamic camber variation during the wingbeat are of particular interest. CFD is an extremely powerful tool for flow field visualization and provides a tremendous amount of data on the flow field (e.g., lift, drag). It is especially useful for simulating environments that are either too dangerous or too 65
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Planetary Exploration Using Biomime
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Table of Contents Table of Contents
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List of Tables List of Tables Table
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List of Figures List of Figures Fig
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List of Figures Figure 3-54: Pressu
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List of Figures Figure 3-138: Stere
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List of Figures Figure 4-24: Averag
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List of Contributors List of Contri
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Executive Summary Executive Summary
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Chapter 1.0 Introduction Chapter 1.
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Chapter 1.0 Introduction Figure 1-2
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Chapter 1.0 Introduction 1.1 Histor
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Chapter 1.0 Introduction 1.2 Origin
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Chapter 3.0 Vehicle Design 3.3 Wing
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Chapter 3.0 Vehicle Design 3.5 Fuel
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Chapter 4.0 Entomopter Flight Opera
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Chapter 5.0 Potential Payload Funct
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Chapter 6.0 Media Exposure 6.1 Intr
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Chapter 6.0 Media Exposure 6.3 Onli
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Chapter 6.0 Media Exposure 6.6 Spec
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Chapter 7.0 Conclusion Chapter 7.0
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Appendix A: Mars Atmosphere Data JP
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Appendix A: Mars Atmosphere Data Ge
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Appendix A: Mars Atmosphere Data Ge
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Appendix A: Mars Atmosphere Data Ma
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Appendix B: Sizing Results Appendix
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Appendix B: Sizing Results 30 Wing
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Appendix B: Sizing Results 16 Wing
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Appendix B: Sizing Results Length 0
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Appendix B: Sizing Results Lenght 0
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Appendix C: List of References Appe
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Appendix C: List of References 41.
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Phase II Final Report - NASA's Institute for Advanced Concepts

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