Interactions Of Spanwise And Chordwise Vorticity Associated With Three Dimensional Dynamic Stall Over An Oscillating Wing

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Interactions of Spanwise and Chordwise Vorticity Associated with Three-Dimensional Dynamic Stall Over an Oscillating Wing

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ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (227 download)

Book Synopsis Interactions of Spanwise and Chordwise Vorticity Associated with Three-Dimensional Dynamic Stall Over an Oscillating Wing by :

Download or read book Interactions of Spanwise and Chordwise Vorticity Associated with Three-Dimensional Dynamic Stall Over an Oscillating Wing written by and published by . This book was released on 1994 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the final report on the experimental research performed under U.S. Army Research Office Grant No. DAAL 03-91-0026, with Dr. Thomas Doligaiski as the Technical Program Manager. The Principal Investigator was B.R. Ramaprian. The research work involved the measurement of the pressure and velocity fields in the three-dimensional flow field surrounding and in the wake of the tip region of a rectangular wing of NACA 0015 profile. Measurements were made both with the wing stationary and with the wing oscillating sinusoidally in pitch about its quarter-chord axis. Pressure transducers and three-component laser Doppler velocimetry were used in these measurements. The results have been used to understand the vorticity dynamics in three-dimensional steady and unsteady flows. The study is relevant to helicopter rotor aerodynamics. All the data have been archived and are available for use by any interested reader.

Scientific and Technical Aerospace Reports

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ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.:/5 (31 download)

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Research in Progress

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ISBN 13 :
Total Pages : 302 pages
Book Rating : 4.:/5 (31 download)

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Download or read book Research in Progress written by and published by . This book was released on 1992 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Government Reports Announcements & Index

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ISBN 13 :
Total Pages : 1436 pages
Book Rating : 4.:/5 (89 download)

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Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1995-09 with total page 1436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

12th AIAA Applied Aerodynamics Conference

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ISBN 13 :
Total Pages : 516 pages
Book Rating : 4.0/5 ( download)

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Download or read book 12th AIAA Applied Aerodynamics Conference written by and published by . This book was released on 1993 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:

International Aerospace Abstracts

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ISBN 13 :
Total Pages : 656 pages
Book Rating : 4.F/5 ( download)

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Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Animal Locomotion

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Author : Graham Taylor
Publisher : Springer Science & Business Media
ISBN 13 : 3642116337
Total Pages : 433 pages
Book Rating : 4.6/5 (421 download)

Book Synopsis Animal Locomotion by : Graham Taylor

Download or read book Animal Locomotion written by Graham Taylor and published by Springer Science & Business Media. This book was released on 2010-03-20 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physical principles of swimming and flying in animals are intriguingly different from those of ships and airplanes. The study of animal locomotion therefore holds a special place not only at the frontiers of pure fluid dynamics research, but also in the applied field of biomimetics, which aims to emulate salient aspects of the performance and function of living organisms. For example, fluid dynamic loads are so significant for swimming fish that they are expected to have developed efficient flow control procedures through the evolutionary process of adaptation by natural selection, which might in turn be applied to the design of robotic swimmers. And yet, sharply contrasting views as to the energetic efficiency of oscillatory propulsion – especially for marine animals – demand a careful assessment of the forces and energy expended at realistic Reynolds numbers. For this and many other research questions, an experimental approach is often the most appropriate methodology. This holds as much for flying animals as it does for swimming ones, and similar experimental challenges apply – studying tethered as opposed to free locomotion, or studying the flow around robotic models as opposed to real animals. This book provides a wide-ranging snapshot of the state-of-the-art in experimental research on the physics of swimming and flying animals. The resulting picture reflects not only upon the questions that are of interest in current pure and applied research, but also upon the experimental techniques that are available to answer them.

An Oscillating Three-Dimensional Wing Experiment: Compressibility, Sweep, Rate, Waveform, and Geometry Effects on Unsteady Separation and Dynamic Stall

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Author : Peter F. Lorber
Publisher :
ISBN 13 :
Total Pages : 187 pages
Book Rating : 4.:/5 (227 download)

Book Synopsis An Oscillating Three-Dimensional Wing Experiment: Compressibility, Sweep, Rate, Waveform, and Geometry Effects on Unsteady Separation and Dynamic Stall by : Peter F. Lorber

Download or read book An Oscillating Three-Dimensional Wing Experiment: Compressibility, Sweep, Rate, Waveform, and Geometry Effects on Unsteady Separation and Dynamic Stall written by Peter F. Lorber and published by . This book was released on 1992 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental measurements of the unsteady separation and dynamic stall process on an oscillating three-dimensional wing are reported. The experiment was conducted at Mach numbers of 0.2-0.6, Reynolds numbers of 2-6 million, and sweep angles of 0, 15, and 30 deg. At low Mach number, as angle of attack is increased the location of transition to turbulence moves forward, the turbulent boundary layer separates near the leading edge, and a strong stall vortex is formed. At higher Mach number, compressibility causes formation of a shock, an earlier, more gradual separation, and reduced unsteady loads. Unsteady tip loads at 0 sweep are increased by the growth of a strong tip vortex. This effect is lessened by sweep-back and compressibility, and enhanced by replacing the round tip cap with a flat tip. Away from the tip, sweep effects on loads are well represented by the swept infinite wing normalization until stall. After stall, vortex propagation patterns are highly dependent on sweep and spanwise position. Sinusoidal and constant pitch rate ramp motions show similar behavior. There is significant hysteresis in both the transition/relaminarization and the separation/reattachment processes. For small amplitude motions simulating stall flutter, substantial regions of negative aerodynamic damping were found -at all studied Mach numbers, sweep angles, and reduced frequencies. The near-simultaneous stall along the span of the swept wing strengthens the resulting instability. An empirical representation of the damping characteristics was developed. Unsteady flow, Separated flow, Transition, Helicopter aerodynamic stall, Stall flutter, Supermaneuverability, Dynamics, Unsteady aerodynamics.

Applied Mechanics Reviews

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ISBN 13 :
Total Pages : 784 pages
Book Rating : 4.3/5 (243 download)

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Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1984 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

AIAA Journal

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Author : American Institute of Aeronautics and Astronautics
Publisher :
ISBN 13 :
Total Pages : 960 pages
Book Rating : 4.F/5 ( download)

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Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 300)

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ISBN 13 :
Total Pages : 686 pages
Book Rating : 4.:/5 (317 download)

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AIAA 22nd Fluid Dynamics, Plasma Dynamics & Lasers Conference: 91-1782 - 91-1825

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ISBN 13 :
Total Pages : 516 pages
Book Rating : 4.0/5 ( download)

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Download or read book AIAA 22nd Fluid Dynamics, Plasma Dynamics & Lasers Conference: 91-1782 - 91-1825 written by and published by . This book was released on 1991 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:

43rd AIAA Aerospace Sciences Meeting & Exhibit

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ISBN 13 :
Total Pages : 590 pages
Book Rating : 4.0/5 ( download)

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Download or read book 43rd AIAA Aerospace Sciences Meeting & Exhibit written by and published by . This book was released on 2005 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Compressibility Effects on the Dynamic Stall of a Three-dimensional Wing

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Author : Peter F. Lorber
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)

Book Synopsis Compressibility Effects on the Dynamic Stall of a Three-dimensional Wing by : Peter F. Lorber

Download or read book Compressibility Effects on the Dynamic Stall of a Three-dimensional Wing written by Peter F. Lorber and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aeronautical Engineering

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ISBN 13 :
Total Pages : 722 pages
Book Rating : 4.F/5 ( download)

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Download or read book Aeronautical Engineering written by and published by . This book was released on 1993 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)

The AFDD International Dynamic Stall Workshop on Correlation of Dynamic Stall Models with 3-D Dynamic Stall Data

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ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (317 download)

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Download or read book The AFDD International Dynamic Stall Workshop on Correlation of Dynamic Stall Models with 3-D Dynamic Stall Data written by and published by . This book was released on 1996 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Dynamic Stall Experiments on a Swept Three-dimensional Wing in Compressible Flow

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Author : Peter F. Lorber
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)

Book Synopsis Dynamic Stall Experiments on a Swept Three-dimensional Wing in Compressible Flow by : Peter F. Lorber

Download or read book Dynamic Stall Experiments on a Swept Three-dimensional Wing in Compressible Flow written by Peter F. Lorber and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: