Computational modeling of unsteady low Reynolds number flapping wing aerodynamics

216 p.

Saved in:

Bibliographic Details
Main Author:	Dominic Denver John Chandar
Other Authors:	Damodaran Murali
Format:	Theses and Dissertations
Published:	2011
Subjects:	DRNTU::Engineering::Aeronautical engineering::Aerodynamics
Online Access:	https://hdl.handle.net/10356/47219
Tags:	Add Tag No Tags, Be the first to tag this record!
Institution:	Nanyang Technological University

id	sg-ntu-dr.10356-47219
record_format	dspace
spelling	sg-ntu-dr.10356-472192023-03-11T17:56:49Z Computational modeling of unsteady low Reynolds number flapping wing aerodynamics Dominic Denver John Chandar Damodaran Murali School of Mechanical and Aerospace Engineering DRNTU::Engineering::Aeronautical engineering::Aerodynamics 216 p. The unsteady low Reynolds number aerodynamics of biomimetic airfoils and wings stands out as one of the most challenging areas of research to the scientific community. As opposed to steady flow where substantial amount of research has been accomplished in understanding the concepts of separation and transition, apart from turbulence, unsteady low Reynolds number flows have not gained much attention except for the past few years owing to difficulties in modeling and simulating such complex flows on arbitrary domains of interest like insect and bird flight, flutter prediction etc. The basic underlying mechanisms of lift and thrust production by birds and insects are well known and have been established by early researchers through extensive experiments and lower order numerical computations, supported by classical theories of unsteady aerodynamics. Nevertheless, to date, experiments and numerical computations of this problem have been focused on predicting aerodynamic forces and moments with specified wing kinematics. The airfoil or wing under study is usually constrained to move along a particular direction with a fixed freestream velocity. The rigid body dynamics of plunging/pitching/flapping bodies have however, received less attention. In the present work, numerical computations have been carried out to simulate the dynamics of plunging airfoils and wings in incompressible flow by coupling rigid body dynamics to the governing equations of fluid motion. In this case, the body accelerates from the state of rest to the state of motion due to the aerodynamic forces and traces a particular trajectory. During the course of the study, the effect of prescribed wing flexibility on forward flight has also been analyzed. A fluid-structure coupling algorithm has been formulated to allow for airfoil and wing deformation, and critical numerical issues relating to the coupling are dealt with in detail. It is shown that, when the deformation of an airfoil is prescribed, under certain conditions, the airfoil with the highest deformation amplitude travels the fastest. However when the deformation is passive, or is obtained from the forces, the airfoil with a moderate flexibility travels the fastest. DOCTOR OF PHILOSOPHY (MAE) 2011-12-27T06:36:56Z 2011-12-27T06:36:56Z 2010 2010 Thesis Dominic, D. J. C. (2010). Computational modeling of unsteady low reynolds number flapping wing aerodynamics. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/47219 10.32657/10356/47219 Nanyang Technological University application/pdf
institution	Nanyang Technological University
building	NTU Library
continent	Asia
country	Singapore Singapore
content_provider	NTU Library
collection	DR-NTU
topic	DRNTU::Engineering::Aeronautical engineering::Aerodynamics
spellingShingle	DRNTU::Engineering::Aeronautical engineering::Aerodynamics Dominic Denver John Chandar Computational modeling of unsteady low Reynolds number flapping wing aerodynamics
description	216 p.
author2	Damodaran Murali
author_facet	Damodaran Murali Dominic Denver John Chandar
format	Theses and Dissertations
author	Dominic Denver John Chandar
author_sort	Dominic Denver John Chandar
title	Computational modeling of unsteady low Reynolds number flapping wing aerodynamics
title_short	Computational modeling of unsteady low Reynolds number flapping wing aerodynamics
title_full	Computational modeling of unsteady low Reynolds number flapping wing aerodynamics
title_fullStr	Computational modeling of unsteady low Reynolds number flapping wing aerodynamics
title_full_unstemmed	Computational modeling of unsteady low Reynolds number flapping wing aerodynamics
title_sort	computational modeling of unsteady low reynolds number flapping wing aerodynamics
publishDate	2011
url	https://hdl.handle.net/10356/47219
_version_	1761781661427564544

Computational modeling of unsteady low Reynolds number flapping wing aerodynamics

Similar Items