Turbulence Measurements In High Speed Wind Tunnels Using Focusing Laser Differential Interferometry

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Turbulence Measurements in High-speed Wind Tunnels Using Focusing Laser Differential Interferometry

Author : Matthew Fulghum
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (94 download)

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Book Synopsis Turbulence Measurements in High-speed Wind Tunnels Using Focusing Laser Differential Interferometry by : Matthew Fulghum

Download or read book Turbulence Measurements in High-speed Wind Tunnels Using Focusing Laser Differential Interferometry written by Matthew Fulghum and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterization of freestream disturbances and their effect on laminar boundary layer transition is of great importance in high-speed wind tunnel testing, where significant differences between the behavior of scale-model and free-flight transition have long been noted. However, the methods traditionally used to perform this characterization in low-speed flows present significant difficulties when applied to supersonic and especially hypersonic wind tunnels. The design and theory of a focusing laser differential interferometer (FLDI) instrument, originally invented by Smeets at the Institut Saint-Louis in the 1970s and used recently by Parziale in the CalTech T5 shock tunnel, is presented. It is a relatively-simple, non-imaging common-path interferometer for measuring refractive signals from transition and turbulence, and it has a unique ability to look through facility windows, ignore sidewall boundary-layers and vibration, and concentrate only on the refractive signal near a pair of sharp beam foci in the core flow. The instrument's low cost and ease of implementation make it a promising alternative to traditional hot-wire anemometry and particle-based methods for turbulence characterization. Benchtop experiments using a turbulent supersonic air jet demonstrate its focusing ability, frequency response, unwanted signal rejection, and ease of use. The instrument is used to optically interrogate the flow in the Penn State University Supersonic Wind Tunnel and USAF AEDC Hypervelocity Tunnel 9 for measurement of the overall intensity and spectra of freestream disturbances. Precise characterization of the strength and spectral content of the disturbances provides insight into their nature and potential effect upon boundary layer transition. A special feature of the FLDI instrument used here is the replacement of traditional fixed Wollaston prisms with variable Sanderson prisms for laser-beam separation and recombination.

Turbulence Measurements in the Boundary Layer of a Low-speed Wind Tunnel Using Laser Velocimetry

Author : Edward T. Schairer
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Turbulence Measurements in the Boundary Layer of a Low-speed Wind Tunnel Using Laser Velocimetry by : Edward T. Schairer

Download or read book Turbulence Measurements in the Boundary Layer of a Low-speed Wind Tunnel Using Laser Velocimetry written by Edward T. Schairer and published by . This book was released on 1980 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Wind Tunnels and Experimental Fluid Dynamics Research

Author : Jorge Colman Lerner
Publisher : BoD – Books on Demand
ISBN 13 : 9533076232
Total Pages : 728 pages
Book Rating : 4.5/5 (33 download)

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Book Synopsis Wind Tunnels and Experimental Fluid Dynamics Research by : Jorge Colman Lerner

Download or read book Wind Tunnels and Experimental Fluid Dynamics Research written by Jorge Colman Lerner and published by BoD – Books on Demand. This book was released on 2011-07-27 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Wind Tunnels and Experimental Fluid Dynamics Research" is comprised of 33 chapters divided in five sections. The first 12 chapters discuss wind tunnel facilities and experiments in incompressible flow, while the next seven chapters deal with building dynamics, flow control and fluid mechanics. Third section of the book is dedicated to chapters discussing aerodynamic field measurements and real full scale analysis (chapters 20-22). Chapters in the last two sections deal with turbulent structure analysis (chapters 23-25) and wind tunnels in compressible flow (chapters 26-33). Contributions from a large number of international experts make this publication a highly valuable resource in wind tunnels and fluid dynamics field of research.

Flow-visualization Techniques Used at High Speed by Configuration Aerodynamics Wind-tunnel-test Team

Author : John E. Lamar
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Flow-visualization Techniques Used at High Speed by Configuration Aerodynamics Wind-tunnel-test Team by : John E. Lamar

Download or read book Flow-visualization Techniques Used at High Speed by Configuration Aerodynamics Wind-tunnel-test Team written by John E. Lamar and published by . This book was released on 2001 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper summarizes a variety of optically based flow-visualization techniques used for high-speed research by the Configuration Aerodynamics Wind-Tunnel-Test Team of the High-Speed Research Program during its tenure. The work of other national experts is included for completeness. Details of each technique with applications and status in various national wind tunnels are given.

Wind Tunnel Test Techniques

Author : Colin Britcher
Publisher : Academic Press
ISBN 13 : 0128181001
Total Pages : 672 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Wind Tunnel Test Techniques by : Colin Britcher

Download or read book Wind Tunnel Test Techniques written by Colin Britcher and published by Academic Press. This book was released on 2023-10-20 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind Tunnel Test Techniques: Design and Use at Low and High Speeds with Statistical Engineering Applications provides an up-to-date treatment of the topic. Beginning with a brief history of wind tunnels and its types and uses, the book goes on to cover subsonic, supersonic and hypersonic wind tunnel design and construction, calibration, boundary corrections, flow quality assessment, pressure surveys, and dynamic testing. It also focuses on wind tunnel facilities, making it useful for both the designer and operator. Engineers and graduate students in aerospace, automotive and similar programs will find this book useful in their work with experimental aerodynamics, gas dynamics, facility design and performance. Deals with a broad range of flow speeds in wind tunnels, from low speed to high speed Provides a discussion of similarity laws as well as material on statistical analysis Includes coverage on facility-to-facility and facility-to-CFD correlation Presents advanced topics such as cryogenic wind tunnels, ground simulation in automotive testing, and propulsion testing

Flow Studies and Turbulence Measurements in the Hesse 6-inch Supersonic Wind Tunnel

Author : Hartmut Bossel
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Flow Studies and Turbulence Measurements in the Hesse 6-inch Supersonic Wind Tunnel by : Hartmut Bossel

Download or read book Flow Studies and Turbulence Measurements in the Hesse 6-inch Supersonic Wind Tunnel written by Hartmut Bossel and published by . This book was released on 1967 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

High Speed Wind Tunnel Testing

Author : Alan Pope
Publisher : John Wiley & Sons
ISBN 13 :
Total Pages : 496 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis High Speed Wind Tunnel Testing by : Alan Pope

Download or read book High Speed Wind Tunnel Testing written by Alan Pope and published by John Wiley & Sons. This book was released on 1965-01-15 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Design and Calibration of the Mixing Layer and Wind Tunnel

Author : Joint Institute for Aeronautics and Acoustics
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Design and Calibration of the Mixing Layer and Wind Tunnel by : Joint Institute for Aeronautics and Acoustics

Download or read book Design and Calibration of the Mixing Layer and Wind Tunnel written by Joint Institute for Aeronautics and Acoustics and published by . This book was released on 1989 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Some Measurements of Time and Space Correlation in Wind Tunnel

Author : A. Favre
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.3/5 (126 download)

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Book Synopsis Some Measurements of Time and Space Correlation in Wind Tunnel by : A. Favre

Download or read book Some Measurements of Time and Space Correlation in Wind Tunnel written by A. Favre and published by . This book was released on 1955 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Results are presented of research obtained by means of an apparatus for measurement of time and space correlation and of a spectral analyser in the study of the longitudinal component of turbulence velocities in a wind tunnel downstream of a grid of meshes. Application to the case of a flat-plate boundary layer is illustrated. These researches were made at the Laboratoire de Mécanique de l'Atmosphère de l'I. M. F. M. for the O.N.E.R.A.

Velocity Measurements in Supersonic Wind Tunnels Using a Laser-induced Spark as Tracer

Author : Kenneth K. Roberge
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.:/5 (251 download)

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Book Synopsis Velocity Measurements in Supersonic Wind Tunnels Using a Laser-induced Spark as Tracer by : Kenneth K. Roberge

Download or read book Velocity Measurements in Supersonic Wind Tunnels Using a Laser-induced Spark as Tracer written by Kenneth K. Roberge and published by . This book was released on 1973 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Velocity measurements in supersonic wind tunnels using a laser-induced spark as a tracer

Author : Kenneth K. Roberge
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.:/5 (989 download)

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Book Synopsis Velocity measurements in supersonic wind tunnels using a laser-induced spark as a tracer by : Kenneth K. Roberge

Download or read book Velocity measurements in supersonic wind tunnels using a laser-induced spark as a tracer written by Kenneth K. Roberge and published by . This book was released on 1973 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Data Processing and Recording for Turbulence Measurements and Low-speed Wind-tunnel Experiments

Author : R. F. Johnson
Publisher :
ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Data Processing and Recording for Turbulence Measurements and Low-speed Wind-tunnel Experiments by : R. F. Johnson

Download or read book Data Processing and Recording for Turbulence Measurements and Low-speed Wind-tunnel Experiments written by R. F. Johnson and published by . This book was released on 1968 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Wind Tunnel Turbulence Measurements

Author : Kenneth L. Pyle
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Wind Tunnel Turbulence Measurements by : Kenneth L. Pyle

Download or read book Wind Tunnel Turbulence Measurements written by Kenneth L. Pyle and published by . This book was released on 1968 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reduction of the turbulence level in wind tunnels has been classically achieved using ordinary wire screens inserted in the settling chanber immediately upstream of the test station. In recent years, it has been suggested that the use of large length-to-diameter ratio honeycomb will achieve similar reductions in turbulence level at much smaller pressure losses, i.e. more efficiently. The honeycomb, exactly like that presently used in aircraft construction, was installed in a specially designed wind tunnel. Turbulence measurements were made using hot-wire anemometer techniques. The data indicates that , depending upon the integral scale of the turbulence, there are optimal cell length Reynolds numbers at which the greatest turbulence reduction is achieved, however, there are also ranges at which there is very little reduction. The honeycomb is believed to operate like a band-pass filter, attenuating only certain frequency ranges. Measurements of the turbulence reduction over a small length Reynolds number range compared favorably with the reductions predicted theoretically when the honeycomb was achieving maximum turbulence reduction.

Flow-Visualization Techniques Used at High Speed by Configuration Aerodynamics Wind-Tunnel-Test Team

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781720526827
Total Pages : 34 pages
Book Rating : 4.5/5 (268 download)

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Book Synopsis Flow-Visualization Techniques Used at High Speed by Configuration Aerodynamics Wind-Tunnel-Test Team by : National Aeronautics and Space Administration (NASA)

Download or read book Flow-Visualization Techniques Used at High Speed by Configuration Aerodynamics Wind-Tunnel-Test Team written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-31 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper summarizes a variety of optically based flow-visualization techniques used for high-speed research by the Configuration Aerodynamics Wind-Tunnel Test Team of the High-Speed Research Program during its tenure. The work of other national experts is included for completeness. Details of each technique with applications and status in various national wind tunnels are given.Lamar, John E. (Editor)Langley Research CenterFLOW VISUALIZATION; HIGH SPEED; WIND TUNNEL TESTS; AERODYNAMIC CONFIGURATIONS; SCHLIEREN PHOTOGRAPHY; CCD CAMERAS; INTERFEROMETRY; THERMOGRAPHY; DELTA WINGS

Flow Studies and Turbulence Measurements in a Prototype Low-speed Blow-down Wind Tunnel

Author : Bassam Rafic al-Assad
Publisher :
ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (785 download)

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Book Synopsis Flow Studies and Turbulence Measurements in a Prototype Low-speed Blow-down Wind Tunnel by : Bassam Rafic al-Assad

Download or read book Flow Studies and Turbulence Measurements in a Prototype Low-speed Blow-down Wind Tunnel written by Bassam Rafic al-Assad and published by . This book was released on 1973 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Wind Tunnels and Experimental Fluid Dynamics Research

Author : Jorge Colman Lerner
Publisher : IntechOpen
ISBN 13 : 9789533076232
Total Pages : 726 pages
Book Rating : 4.0/5 (762 download)

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Book Synopsis Wind Tunnels and Experimental Fluid Dynamics Research by : Jorge Colman Lerner

Download or read book Wind Tunnels and Experimental Fluid Dynamics Research written by Jorge Colman Lerner and published by IntechOpen. This book was released on 2011-07-27 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Wind Tunnels and Experimental Fluid Dynamics Research" is comprised of 33 chapters divided in five sections. The first 12 chapters discuss wind tunnel facilities and experiments in incompressible flow, while the next seven chapters deal with building dynamics, flow control and fluid mechanics. Third section of the book is dedicated to chapters discussing aerodynamic field measurements and real full scale analysis (chapters 20-22). Chapters in the last two sections deal with turbulent structure analysis (chapters 23-25) and wind tunnels in compressible flow (chapters 26-33). Contributions from a large number of international experts make this publication a highly valuable resource in wind tunnels and fluid dynamics field of research.

Low-Speed Wind Tunnel Testing

Author : Jewel B. Barlow
Publisher : John Wiley & Sons
ISBN 13 : 0471557749
Total Pages : 738 pages
Book Rating : 4.4/5 (715 download)

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Book Synopsis Low-Speed Wind Tunnel Testing by : Jewel B. Barlow

Download or read book Low-Speed Wind Tunnel Testing written by Jewel B. Barlow and published by John Wiley & Sons. This book was released on 1999-02-22 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt: A brand-new edition of the classic guide on low-speed wind tunnel testing While great advances in theoretical and computational methods have been made in recent years, low-speed wind tunnel testing remains essential for obtaining the full range of data needed to guide detailed design decisions for many practical engineering problems. This long-awaited Third Edition of William H. Rae, Jr.'s landmark reference brings together essential information on all aspects of low-speed wind tunnel design, analysis, testing, and instrumentation in one easy-to-use resource. Written by authors who are among the most respected wind tunnel engineers in the world, this edition has been updated to address current topics and applications, and includes coverage of digital electronics, new instrumentation, video and photographic methods, pressure-sensitive paint, and liquid crystal-based measurement methods. The book is organized for quick access to topics of interest, and examines basic test techniques and objectives of modeling and testing aircraft designs in low-speed wind tunnels, as well as applications to fluid motion analysis, automobiles, marine vessels, buildings, bridges, and other structures subject to wind loading. Supplemented with real-world examples throughout, Low-Speed Wind Tunnel Testing, Third Edition is an indispensable resource for aerospace engineering students and professionals, engineers and researchers in the automotive industries, wind tunnel designers, architects, and others who need to get the most from low-speed wind tunnel technology and experiments in their work.