Measurements of Wings at Very Low Reynolds Numbers PDF Download
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Author: Nathan F. Bishop
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Very low Reynolds number aerodynamics is a rapidly growing field of interest, especially in regard to the design and development of micro- and nano-air vehicles. In the work culminating in this thesis, force measurement apparatuses were designed and prototyped to measure wing performance at very low Reynolds numbers in a water tunnel. The lift and drag behavior for rectangular wings with discretely angled wing profiles and aspect ratio were obtained at Reynolds numbers between 4,000 and 10,000. This thesis is intended to inform both future force measurement apparatus development for water tunnel applications and experimental research in wing performance at very low Reynolds numbers.
Author: Nathan F. Bishop
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Very low Reynolds number aerodynamics is a rapidly growing field of interest, especially in regard to the design and development of micro- and nano-air vehicles. In the work culminating in this thesis, force measurement apparatuses were designed and prototyped to measure wing performance at very low Reynolds numbers in a water tunnel. The lift and drag behavior for rectangular wings with discretely angled wing profiles and aspect ratio were obtained at Reynolds numbers between 4,000 and 10,000. This thesis is intended to inform both future force measurement apparatus development for water tunnel applications and experimental research in wing performance at very low Reynolds numbers.
Author: Wei Shyy
Publisher: Cambridge University Press
ISBN: 1107037263
Category : Science
Languages : en
Pages : 321
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Book Description
For anyone interested in the aerodynamics, structural dynamics and flight dynamics of small birds, bats, insects and air vehicles (MAVs).
Author: Michael S. Selig
Publisher: Soartech
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 320
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Book Description
Author: Thomas J. Mueller
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
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Book Description
A description of the micro-air vehicle (MAV) concept and design requirements is presented. These vehicles are very small and therefore operate at chord Reynolds numbers below 200,000 where very little data is available on the performance of lifting surfaces, i.e., airfoils and low aspect-ratio wings. This paper presents the results of a continuing study of the methods that can be used to obtain reliable force and moment data on thin wings in wind and water tunnels. To this end, a new platform force and moment balance, similar to an already existing balance, was designed and built to perform lift, drag and moment measurements at low Reynolds numbers. Balance characteristics and validation data are presented. Results show a good agreement between published data and data obtained with the new balance. Results for lilt, drag and pitching moment about the quarter chord with the existing aerodynamic balance on a series of thin flat plates and cambered plates at low Reynolds numbers are presented. They show that the cambered plates offer better aerodynamic characteristics and performance. Moreover, it appears that the trailing-edge geometry of the wings and the turbulence intensity up to about 1% in the wind tunnel do not have a strong effect on the lilt and drag for thin wings at low Reynolds numbers. However, the presence of two endplates for two-dimensional tests and one endplate for the semi-infinite tests appears to have an undesirable influence on the lift characteristics at low Reynolds numbers.
Author: Mustafa Serdar Genç
Publisher: BoD – Books on Demand
ISBN: 9535104926
Category : Science
Languages : en
Pages : 176
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Book Description
This book reports the latest development and trends in the low Re number aerodynamics, transition from laminar to turbulence, unsteady low Reynolds number flows, experimental studies, numerical transition modelling, control of low Re number flows, and MAV wing aerodynamics. The contributors to each chapter are fluid mechanics and aerodynamics scientists and engineers with strong expertise in their respective fields. As a whole, the studies presented here reveal important new directions toward the realization of applications of MAV and wind turbine blades.
Author: Kevin A. Paulson
Publisher:
ISBN:
Category : Aerodynamic measurements
Languages : en
Pages : 70
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Book Description
Author: George L. Pratt
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 110
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Book Description
Author: H. Herbert Jackson
Publisher:
ISBN:
Category : Mach number
Languages : en
Pages : 38
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Book Description
Author: Wei Shyy
Publisher: Cambridge University Press
ISBN: 9780521204019
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
Low Reynolds number aerodynamics is important to a number of natural and man-made flyers. Birds, bats, and insects have been of interest to biologists for years, and active study in the aerospace engineering community, motivated by interest in micro air vehicles (MAVs), has been increasing rapidly. The primary focus of this book is the aerodynamics associated with fixed and flapping wings. The book consider both biological flyers and MAVs, including a summary of the scaling laws-which relate the aerodynamics and flight characteristics to a flyer's sizing on the basis of simple geometric and dynamics analyses, structural flexibility, laminar-turbulent transition, airfoil shapes, and unsteady flapping wing aerodynamics. The interplay between flapping kinematics and key dimensionless parameters such as the Reynolds number, Strouhal number, and reduced frequency is highlighted. The various unsteady lift enhancement mechanisms are also addressed, including leading-edge vortex, rapid pitch-up and rotational circulation, wake capture, and clap-and-fling.
Author: Ira H. Abbott
Publisher: Courier Corporation
ISBN: 0486134997
Category : Technology & Engineering
Languages : en
Pages : 708
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Book Description
Concise compilation of subsonic aerodynamic characteristics of NACA wing sections, plus description of theory. 350 pages of tables.
