Aerodynamics of unconventional airfoils

This project will explore lift enhancement methods for MAVs under low Reynolds number flight where CLmax are significantly lower. It will study the beneficial effects of vortices to enhance lift through both Static and Dynamic Leading Edge Vortices (LEVs). LEVs create an area of suction which genera...

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Main Author: Ng, Bing Feng.
Other Authors: Jorg Uwe Schluter
Format: Final Year Project
Language:English
Published: 2009
Subjects:
Online Access:http://hdl.handle.net/10356/16798
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-167982023-03-04T18:52:41Z Aerodynamics of unconventional airfoils Ng, Bing Feng. Jorg Uwe Schluter School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering DRNTU::Engineering::Aeronautical engineering::Aerodynamics This project will explore lift enhancement methods for MAVs under low Reynolds number flight where CLmax are significantly lower. It will study the beneficial effects of vortices to enhance lift through both Static and Dynamic Leading Edge Vortices (LEVs). LEVs create an area of suction which generates a low pressure region to increase lift. Static LEVs are stationary vortices trapped over the top surface of an airfoil. As such, it will be shown here that static LEVs can be created and trapped through the use of cavities. This project will assess the effectiveness of different cavity airfoil designs in vortex capturing and from one of them, analyze the amount of additional lift created. As it will be showed both experimentally and computationally, the lift characteristics of cavity airfoils are lower than that of non-cavity airfoils. Dynamic LEVs are created through flapping motion and are most prominent at the end of its up-stroke. It forms over the leading edge and is shed downstream towards the trailing edge. In this project, it will first study the lift characteristics of static flat plate in low Reynolds number flow where there is absence of Dynamic LEVs. Subsequently, a flapping flat plate will be used to create Dynamic LEVs at the end of its up-stroke and average lift coefficients measured. It will be shown experimentally that the results from flapping flat plate (after modification) was creating higher lift as compared to static flat plate. Bachelor of Engineering (Aerospace Engineering) 2009-05-28T04:33:09Z 2009-05-28T04:33:09Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/16798 en Nanyang Technological University 107 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering
DRNTU::Engineering::Aeronautical engineering::Aerodynamics
spellingShingle DRNTU::Engineering::Mechanical engineering
DRNTU::Engineering::Aeronautical engineering::Aerodynamics
Ng, Bing Feng.
Aerodynamics of unconventional airfoils
description This project will explore lift enhancement methods for MAVs under low Reynolds number flight where CLmax are significantly lower. It will study the beneficial effects of vortices to enhance lift through both Static and Dynamic Leading Edge Vortices (LEVs). LEVs create an area of suction which generates a low pressure region to increase lift. Static LEVs are stationary vortices trapped over the top surface of an airfoil. As such, it will be shown here that static LEVs can be created and trapped through the use of cavities. This project will assess the effectiveness of different cavity airfoil designs in vortex capturing and from one of them, analyze the amount of additional lift created. As it will be showed both experimentally and computationally, the lift characteristics of cavity airfoils are lower than that of non-cavity airfoils. Dynamic LEVs are created through flapping motion and are most prominent at the end of its up-stroke. It forms over the leading edge and is shed downstream towards the trailing edge. In this project, it will first study the lift characteristics of static flat plate in low Reynolds number flow where there is absence of Dynamic LEVs. Subsequently, a flapping flat plate will be used to create Dynamic LEVs at the end of its up-stroke and average lift coefficients measured. It will be shown experimentally that the results from flapping flat plate (after modification) was creating higher lift as compared to static flat plate.
author2 Jorg Uwe Schluter
author_facet Jorg Uwe Schluter
Ng, Bing Feng.
format Final Year Project
author Ng, Bing Feng.
author_sort Ng, Bing Feng.
title Aerodynamics of unconventional airfoils
title_short Aerodynamics of unconventional airfoils
title_full Aerodynamics of unconventional airfoils
title_fullStr Aerodynamics of unconventional airfoils
title_full_unstemmed Aerodynamics of unconventional airfoils
title_sort aerodynamics of unconventional airfoils
publishDate 2009
url http://hdl.handle.net/10356/16798
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