Integrated Computational And Experimental Studies Of Flapping Wing Micro Air Vehicle Aerodynamics
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Integrated Computational And Experimental Studies Of Flapping Wing Micro Air Vehicle Aerodynamics
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Author :
language : en
Publisher:
Release Date : 2007
Integrated Computational And Experimental Studies Of Flapping Wing Micro Air Vehicle Aerodynamics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
This paper describes recent research on flapping-wing micro air vehicles, based on insect-like aerodynamics. A combined analytical, experimental and CFD approach is being adopted to understand and design suitable wing aerodynamics and kinematics. The CFD has used the Fluent 6 commercial code together with the grid-generating software Gambit 2; the experiments have been conducted in air and water, using various rigs and techniques. Part of our work has used 2D CFD and linear experiments (in a water tunnel). This has revealed details on vortex stability, the role of Kelvin-Helmholtz instability and Reynolds number effects. 3D CFD on rotating wings and equivalent experiments in a water tank have then been used to investigate the role of spanwise flow in the leading-edge vortex.
Flapping Wing Vehicles
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Author : Lung-Jieh Yang
language : en
Publisher: CRC Press
Release Date : 2021-09-16
Flapping Wing Vehicles written by Lung-Jieh Yang and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-16 with Airplanes categories.
Flapping wing vehicles (FWVs) has unique flight characteristics and the successful flight of such a vehicle depends upon efficient design of flapping mechanism while keeping the minimal weight of the structure. This book discusses design and kinematic analysis of various flapping wing mechanisms, measurement of flap angle/flapping frequency, computational fluid dynamic analysis of motion characteristics including manufacturing techniques. It also includes wind tunnel experiments, high speed photographical analysis of aerodynamic performance, soap film visualization of 3D down washing, studies on the effect of wing rotation and figure-8 motion characteristics and so forth. Covers all the aspects of a flapping-wing vehicles needed to design one and understand how/why it flies. Explains related engineering practice including fabrication, materials, and manufacturing. Includes CFD analysis of 3D wing profile. Discusses image-based control of group of Ornithopters. Explores indigenous PCB design for achieving altitude and attitude control. This book is aimed at Researchers and Graduate students in Mechatronics, Materials, Aerodynamics, Robotics, Biomimetics, vehicle design, MAV/UAV.
Fixed And Flapping Wing Aerodynamics For Micro Air Vehicle Applications
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Author : Thomas J. Mueller
language : en
Publisher: AIAA
Release Date : 2001
Fixed And Flapping Wing Aerodynamics For Micro Air Vehicle Applications written by Thomas J. Mueller and has been published by AIAA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Aerodynamics categories.
This title reports on the latest research in the area of aerodynamic efficency of various fixed-wing, flapping wing, and rotary wing concepts. It presents the progress made by over fifty active researchers in the field.
Experimental Characterization Design Analysis And Optimization Of Flexible Flapping Wings For Micro Air Vehicles
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Author : Pin Wu
language : en
Publisher:
Release Date : 2010
Experimental Characterization Design Analysis And Optimization Of Flexible Flapping Wings For Micro Air Vehicles written by Pin Wu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
ABSTRACT:This work has advanced the understanding of flapping flight of flexible wings designed to be used in micro air vehicles. A complete new experimental setup that includes a wing actuation mechanism, a customized digital image correlation system, a control system, a load sensor and a vacuum chamber is realized for this study. The technique of digital image correlation has also been developed so that complicated wing kinematics and deformation can be measured. The flapping wing effectiveness and efficiency have been evaluated in different conditions. The results indicate that passive wing deformation can be utilized to enhance aerodynamic performance, under certain inertial loading mainly dictated by flapping frequency, amplitude, wing compliance and mass distribution. The wing deformation reflects the aeroelastic effect produced by the coupled aerodynamic loading as well as the inertial loading. Critical parameters extracted from the deformation data are used to characterize the structural properties of the wings and correlate with the aerodynamic performance. The correlation shows that for one-degree-of-freedom kinematics, wing deformation can be directly used to predict time averaged thrust. The intrinsic relationship between kinematics and inertial loading enables the design and optimization of wing structure based on the correlation results.
Computational Investigation Of Flapping Wing Propulsion For A Micro Air Vehicle
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Author : Seng Chuan Lim
language : en
Publisher:
Release Date : 2006
Computational Investigation Of Flapping Wing Propulsion For A Micro Air Vehicle written by Seng Chuan Lim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Aerodynamics categories.
The low Reynolds number aerodynamics of the flapping wing Micro-Air Vehicle (MAV) developed at NPS by Max Platzer and Kevin Jones was studied numerically. The dynamic mesh simulation model of the full multi-wing configuration, which consists of a fixed wing and a pair of aft position, opposed pitch/ plunge flapping wings was developed using an advanced CFD code that is available commercially. The unsteady flow fields, wake structures and forces were determined by solving the incompressible Navier-Stokes equations, and the results were compared to past experimental observations. The results were encouraging and provided impetus for future computational optimization studies on the NPS flapping wing MAV.
Recent Progress Towards Developing An Insect Inspired Flapping Wing Micro Air Vehicle
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Author :
language : en
Publisher:
Release Date : 2007
Recent Progress Towards Developing An Insect Inspired Flapping Wing Micro Air Vehicle written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
This paper presents an overview of the on-going research activities at Shrivenham, aimed at the design of an autonomous flapping-wing micro air vehicle. After introducing the problem of insect wing kinematics and aerodynamics, we describe our quasi-three-dimensional aerodynamic model for flapping wings. This is followed by a brief discussion of some aerodynamic issues relating to the lift-generating leading-edge vortex. New results are then presented on modelling of wing aeroelastic deflections. Finally, some brief observations are made on flight control requirements for an insect-inspired flapping-wing micro air vehicle. Overall, it is shown that successful development of such a vehicle will require a multi-disciplinary approach, with significant developments in a number of disciplines. Progress to date has largely been concerned with hover. Little is known about the requirements for successful manoeuvre.
Progress In Astronautics And Aeronautics
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Author :
language : en
Publisher:
Release Date : 2001
Progress In Astronautics And Aeronautics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Aerodynamics categories.
Flapping Wing Design For A Dragonfly Like Micro Air Vehicle
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Author : Daniel T. Prosser
language : en
Publisher:
Release Date : 2011
Flapping Wing Design For A Dragonfly Like Micro Air Vehicle written by Daniel T. Prosser and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Aerodynamics categories.
"In this thesis, the aerodynamics of the Quad-Wing Vehicle, a Micro Air Vehicle designed to hover with four flapping wings in a dragonfly-like configuration, is investigated using Computational Fluid Dynamics (CFD), potential flows analysis, and experimental testing. The CFD analysis investigates the kinematics-parameters design space and identifies values of kinematics parameters that maximize the vertical force reduction in hovering mode while minimizing the aerodynamic power requirement. It also investigates other important considerations, such as the effect of scaling, multi-wing interactions, and comparison with other flapping configurations. In the potential flows analysis , an unsteady 2D panel code is developed and compared with CFD for a broad range of hovering-flight simulations. The results show that, with further development, panel codes may be useful to designers of hovering flapping MAVs because of their time-saving potential compared to CFD. The experimental testing focuses on isolating the aerodynamic forces from other measured forces on a benchtop flapping device, and the findings of the experimental study will be useful for later researchers using experimental methods to study flapping MAV aerodynamics."--Abstract.
Development Of A Tandem Wing Flapping Micro Aerial Vehicle Prototype And Experimental Mechanism
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Author : Christopher DiLeo
language : en
Publisher: ProQuest
Release Date : 2007
Development Of A Tandem Wing Flapping Micro Aerial Vehicle Prototype And Experimental Mechanism written by Christopher DiLeo and has been published by ProQuest this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Airplanes categories.
In the field of micro-aerial vehicles (MAVs), simplicity of design is an important design characteristic. Simplicity in this context implies light weight, a prerequisite for flapping flight, and from a practical standpoint it aids in the manufacture and operation of the mechanism on such a small scale. However, simplicity comes at a price: as mechanisms are simplified they have fewer degrees of freedom, lower controllability, less power output. All of these will effect the ability of the mechanism to generate lift, but the losses can be minimized through proper design and implementation. This thesis describes the design and fabrication of a flapping-wing MAV deriving inspiration from the biological mechanisms of a dragonfly. Dragonflies flap with an inclined stroke plane for hovering flight, which in conjunction with their two pairs of wings, presents an unexplored area of research for MAVs. Small changes in the hovering-flight wing kinematics create large simplifications in their mechanical reproduction. The MAV utilizes these simplifications while maintaining the most important characteristics of dragonfly hovering flight, including passive rotation of the wings, reliance on drag forces to generate lift, and the fluid interactions between adjacent wings flapping out-of-phase. Two successive prototypes are presented, focusing on component design and fabrication techniques. These prototypes allow for easy modification of kinematic variables (phase shift between the fore-and hind-wings and factors that affect wing angle-of-attack) and component variables (most importantly, wing characteristics: size, shape, flexibility), important for future optimization. Initial experimental validation of the prototypes is presented. To facilitate the experimental validation, a mechanical flapping wing mechanism has been designed and fabricated which is able to reproduce the high-stroke-plane kinematics utilized by dragonflies, an ability lacking in present flapping mechanisms. This flapping wing mechanism allows for the measurement of the instantaneous forces on a wing for a particular kinematics, by driving the wing with dynamically similar kinematics in a tank of oil. These experiments will be used in the future to analyze and optimize the lift generated by flapping-wing MAVs.
An Experimental Investigation On The Micro Air Vehicle
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Author : Shih Kang Huang
language : en
Publisher:
Release Date : 2014
An Experimental Investigation On The Micro Air Vehicle written by Shih Kang Huang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Mechanical engineering categories.
An experimental investigation was conducted to study the flow characteristics of the flow around the flapping wings of a four-wing flapper as well as the lift and thrust coefficient of a four-wing flapper. In the present study, a clap-and-fling type of four-wing flapper was designed and manufactured by using several flexible materials, such as PET film, latex, and aluminized Mylar. Different cross-strut patterns and dimensions of wings were manufactured and tested to optimize the wing designs. In addition to taking the lift and thrust measurements using a highly sensitive force moment sensor unit, a high-resolution Particle Image Velocimetry (PIV) system was employed to achieve detailed flow field measurements to quantify the evolution of the unsteady vortex flow structure around the wings and in the downstream of the flapper. The force measurements were analyzed in correlation with the detailed flow measurements to elucidate the underlying physics to improve our understanding for an optimized flexible wing design and to achieve better performance for flapping wing micro air vehicles. A woofer loudspeaker was employed at the test section where the four-wing flapper was placed to generate sound distances. The effect of different frequencies and amplitudes of sound waves on the aerodynamic performance was investigated. A sensitive force moment sensor unit and PIV system were utilized to measure the lift and thrust and to take detailed flow field measurements to quantify the effect of sound waves on the flow and wing deformation. The force measurements were analyzed in correlation with the detailed flow measurements and qualitative wing deformation data to elucidate underlying the physics in to improve our understanding of the effect of acoustic disturbances on flexible wings and the overall aerodynamic performance of MAVs.