Investigation of Low Aspect-ratio Effect on Thin-plate Wing at Low Reynolds Numbers PDF Download
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Author: 劉益仲
Publisher:
ISBN:
Category :
Languages : en
Pages : 75
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Book Description
Author: 劉益仲
Publisher:
ISBN:
Category :
Languages : en
Pages : 75
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Book Description
Author: 陳崇海
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
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Book Description
Author: Christopher A. Brown
Publisher:
ISBN:
Category :
Languages : en
Pages : 292
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Book Description
Author: 劉益仲
Publisher:
ISBN:
Category :
Languages : en
Pages : 221
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Book Description
Author: Franz Wilhelm Schmitz
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 218
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Book Description
Author: Robert William Fralich
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 652
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Book Description
A flutter analysis, employing slender-body aerodynamic theory and thin-plate theory, is made for rectangular wings of very low aspect ratio with a constant thickness. The spanwise variation of wing deflection is assumed to be given by a parabola, and the chordwise variation is allowed complete freedom. The results show the vsriation of flutter speed and male shape with aspect ratio. Comparisons are made with additional resuits obtained by approximating the chordwise deflection shape by use of parabolic or cubic curves. The analysis shows that the cubic approximation gives good resuits for a ratio of chord to semispan less than 3.
Author:
Publisher:
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Category :
Languages : en
Pages : 0
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Book Description
The recent interest in the development of small UAVs and micro air vehicles has revealed a need for a more thorough understanding of the aerodynamics of small airplanes flying at low speeds. In response to this need, the present work provides a comprehensive study of the lift, drag, and pitching moment characteristics of wings of low aspect ratio operating at low Reynolds numbers. Wind tunnel tests of wings with aspect ratios between 0.5 and 2.0 and with four distinct wing planforms have been conducted at chord-Reynolds numbers in the range of 70,000 to 200,000. In addition, the effect of leading edge shape and fuselage bodies has been studied. As an example of an application of this wind tunnel data, the experimental results are used as part of an aerodynamic analysis procedure. This procedure is incorporated into a genetic algorithm optimization program that generates optimum MAV configurations given certain requirements and constraints. Results obtained by use of this optimization procedure have revealed that useful and accurate design-optimization tools can be developed based on the experimental data presented within this report.
Author: George L. Pratt
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 110
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Book Description
Author: Michael S. Selig
Publisher: Soartech
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 320
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Book Description
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.
