Download PDF by Wei Shyy, Yongsheng Lian, Jian Tang, Dragos Viieru, Hao Liu: Aerodynamics of Low Reynolds Number Flyers

By Wei Shyy, Yongsheng Lian, Jian Tang, Dragos Viieru, Hao Liu

ISBN-10: 0521882788

ISBN-13: 9780521882781

Low Reynolds quantity aerodynamics is critical to a few average and man-made flyers. Birds, bats, and bugs were of curiosity to biologists for years, and energetic examine within the aerospace engineering neighborhood, inspired by way of curiosity in micro air autos (MAVs), has been expanding speedily. the first concentration of this publication is the aerodynamics linked to mounted and flapping wings. The ebook reflect on either organic flyers and MAVs, together with a precis of the scaling laws-which relate the aerodynamics and flight features to a flyer's sizing at the foundation of straightforward geometric and dynamics analyses, structural flexibility, laminar-turbulent transition, airfoil shapes, and unsteady flapping wing aerodynamics. The interaction among flapping kinematics and key dimensionless parameters similar to the Reynolds quantity, Strouhal quantity, and diminished frequency is highlighted. a few of the unsteady raise enhancement mechanisms also are addressed, together with modern vortex, swift pitch-up and rotational circulate, wake trap, and clap-and-fling.

Show description

Read or Download Aerodynamics of Low Reynolds Number Flyers PDF

Similar aeronautics & astronautics books

Read e-book online Development of Regional Airports: Theoretical Analyses and PDF

Nice recognition is dedicated, for instance in Europe, to the advance of local airports, either to enhance the congestion scenario on the major hubs and to assist the industrial improvement of a few decentralized parts. during this context, extra actors can play an immense position, as airport planners, air businesses (including reasonably cheap businesses) and clients (passengers and/or freight) that have an effect on call for degrees at airports via their trip offerings.

Jack L. Kerrebrock's Aircraft Engines and Gas Turbines, Second Edition PDF

Airplane Engines and gasoline generators is everyday as a textual content within the usa and in a foreign country, and has additionally develop into a typical reference for execs within the plane engine undefined. distinctive in treating the engine as a whole approach at expanding degrees of class, it covers every kind of contemporary plane engines, together with turbojets, turbofans, and turboprops, and likewise discusses hypersonic propulsion structures of the longer term.

Sheng-Chih Wang's Transatlantic Space Politics: Competition and Cooperation PDF

This ebook examines transatlantic politics via an research of 60 years of US-European strategic interplay in area. the importance of house politics for the research of transatlantic relatives gets unusually little scholarly awareness. As a theatre of interplay, transatlantic area politics displays the vicissitudes of ecu and US energy within the foreign procedure.

Tim Kershaw's Jet Pioneers: Gloster and the Birth of the Jet Age PDF

In April 1941 Britain's first jet left the floor at a grass airfield four miles from Gloucester Cathedral. It used to be the beginning of a revolution in air trip, army and civilian. throughout the Nineteen Forties Britain's first-ever jet airplane, the world's first jet fighter in squadron provider and the 1st jet to carry the area air-speed checklist have been all designed, equipped and flown within the Gloucester and Cheltenham zone.

Additional resources for Aerodynamics of Low Reynolds Number Flyers

Example text

2 Wingspan Often, when flapping animals are studied, parameters of interest are related to the body mass m of the animal. Using the dimensional argument method, assuming geometric similarity for the animals considered, one can determine a relation between the wingspan and the mass. 704m1/3 (birds). 3 Wing Area Norberg (1990) reports that the wing area between groups of animals shows larger variations than the wingspan. 1. As for the wingspan, hummingbirds have the largest deviation from the geometrical relation.

In accordance with the Lifting Line Theory (Jones, 1990), the lift on a wing is related to the strength of the bound vortex. The trailing vortices (the tip vortices) are of the same circulation magnitude as the bound vortex. At the beginning/end of the downstroke, when the flapping velocity changes direction, a transverse vortex (starting/stopping vortex) is produced at the trailing edge, and, according to Kelvin’s circulation theorem, these two transverse vortices connect the two tip vortices and result in the shedding of a vortex ring.

The birds modulate their wingbeat kinematics among these phases and frequently exhibit nonflapping phases while decelerating. They find that, during steady-speed flight, wing-beat frequency does not change appreciably with horizontal flight speed. Instead, the body angle relative to the horizontal decreases with increasing flight speed, thereby illustrating P1: SBT 9780521882781c01 CUFX190/Shyy 14 978 0 521 88278 1 September 10, 2007 14:36 Introduction that the dominant function of wing flapping changes from weight support at slow speeds to positive thrust at fast speeds.

Download PDF sample

Aerodynamics of Low Reynolds Number Flyers by Wei Shyy, Yongsheng Lian, Jian Tang, Dragos Viieru, Hao Liu


by David
4.3

Rated 4.89 of 5 – based on 40 votes