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Friday, May 15, 2020 | History

2 edition of Performance test of laser velocimeter system for the Langley 16-Foot Transonic Tunnel found in the catalog.

Performance test of laser velocimeter system for the Langley 16-Foot Transonic Tunnel

Performance test of laser velocimeter system for the Langley 16-Foot Transonic Tunnel

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Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Lasers.

  • Edition Notes

    StatementJames F. Meyers ... [et al.].
    SeriesNASA technical paper -- 2502., AVSCOM technical report -- 85-B-4.
    ContributionsMyers, James F., United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14663485M

    16th Aerodynamic Ground Testing Conference. 18 June - 20 June Seattle,WA,U.S.A. Meeting Paper Home; The development of a 3-D laser velocimeter for the NASA Langley low turbulence pressure wind tunnel. GREGORY JONES, WENDELL ADAMS, The new FFA T transonic wind tunnel initial operation, calibration, and test results. LARS. laser velocimeter A system that uses a continuous-wave laser to measure the velocity of an object by focusing the laser beam on the object, perpendicular to its direction of motion. An optical grating receives pinpoint rays reflected by the object and transmits them to a photomultiplier, which by detecting the light impulses, can provide a.

    - Explore mariejason's board "Wind Tunnels", followed by people on Pinterest. See more ideas about Wind tunnel, Wind, Tunnel pins. 1. Fluid dynamic measurements. 2. Fluid mechanics. 3. Laser Doppler velocimeter. I. Boutier, A. (Alain) TAM43L dc23 British Library Cataloguing-in-Publication Data A CIP record for this book is available from the British Library ISBN:

    The performance of lifting surfaces at transonic conditions is of practical importance to both fixed-wing aircraft and rotorcraft technology. In view of this, considerable effort has been expended in developing numerical prediction techniques applicable to airfoils and wings operating at transonic by: 1. Linear velocity sensors can be many different types of devices, including sensor element or chip, sensor or transducer, instrument or meter, gauge or indicator, and recorder and totalizers. A sensor element or chip denotes a "raw" device such as a strain gauge, or one .


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Performance test of laser velocimeter system for the Langley 16-Foot Transonic Tunnel Download PDF EPUB FB2

An investigation in the Langley Foot Transonic Tunnel has been conducted in which a laser velocimeter was used to measure free-stream velocities from Mach to and the flow velocities along the stagnating streamline of a hemisphere- cylinder model at Mach and The flow velocity was also measured at Mach An investigation in the Langley Foot Transonic Tunnel has been conducted in which a laser velocimeter was used to measure free-stream velocities from Mach to and the flow velocities.

Get this from a library. Performance test of laser velocimeter system for the Langley Foot Transonic Tunnel. [James F Meyers; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.;].

Laser Velocimeter System The performance requirements of the dedicated laser velocimeter system for the Langley Foot Transonic Tunnel are as follows: 1. Capability to measure free-stream velocities from 70 m/sec to m/sec with an accuracy of 1 percent in the mean velocity.

Bidirectional velocity measurement capability along the tunnel axis. Performance test of laser velocimeter system for the Langley Foot Transonic Tunnel / By James F. Meyers, United States. Army Aviation Systems Command.

Topics: Transonic wind tunnels., Laser Doppler velocimeter. Back to Foot Transonic Tunnel. The original test logs have been scanned and are available for viewing.

Decmebr 6, - April - June The following links contain information on the individual tests. Test - Douglas XA Invader with Pratt & Whitney R Double Wasp Engine.

SCHEMATIC OF THE LANGLEY FOOT TRANSONIC TUNNEL LASER VELOCIMETER lnis is a schemstic of the laser velocimeter system as it is installed in the test section plenum chamber. The plenum chamber is a meter diameter cylinder which surrounds the test section.

The laser. Laser Surface Velocimeter – Laser Doppler Measurement Systems With a typical measurement accuracy of ± 0,05% and equipped with a quadrature output, the µSPEED Laser-Encoder is the perfectly suited gauge to replace tactile speedometers/rotary encoders or to replace length and speed measurement via machine drives.

Industry-Leading Performance – Dual-Beam Laser Doppler Velocimeter technology combined with the Auto Correlation algorithm enables LaserSpeed Pro to deliver better than ±% accuracy and ±% repeatability for the depth of fi eld up to mm and full velocity range – the fi nest performance File Size: 4MB.

Performance test of laser velocimeter system for the Langley Foot Transonic Tunnel [microform] / Jame Tunable CW diode-pumped Tm,Ho: YLiF₄ laser operating at or near room temperature [microform] / invento Dye laser traveling wave amplifier [microform] / F.

Davidson, J. Hohman. Lasers: harnessing the atom's light. New York: Scientific American Library: Distributed by W.H. Freeman. MLA Citation. Harbison, James P. and Nahory, Robert E. Lasers: harnessing the atom's light / James P. Harbison, Robert E.

Nahory Scientific American Library: Distributed by W.H. Freeman New York Australian/Harvard Citation. Foot Transonic Tunnel. The Langley Foot Transonic Tunnel (Ft TT) is an atmospheric, closed-circuit tunnel with a Mach number range of to and a Reynolds number range from 1 x 10 6 to 4 x 10 6 per foot.

The test section of the tunnel is octagonal with a. Originally named the OMAC I, the OMAC Laser was a business aircraft built in The Laser program became one of the first projects carried out cooperatively by NASA and private industry.

A joint team used the Langley Foot Low Speed Tunnel to investigate the stability and control characteristics the unusual design. Special. a laser Doppler velocimeter and study the characteristics of di erent ow patterns to evaluate the potential of this method.

2 Laser Doppler Velocimetry Theory The experiment uses the Doppler e ect to calculate the velocity of particles in uids. Light scattered on moving particles experi-ences a shift in frequencies according to f r = f b 1 File Size: 2MB. This book presents the various techniques of laser velocimetry, as well as their specific qualities: local measurements or in plane maps, mean or instantaneous values, 3D measurements.

Flow seeding with particles is described with currently used products, as well as the appropriate aerosol generators. Non-contact sensors such as the LSV laser surface velocimeter substantially exceed the performance of conventional contact-based and contactless measurement methods.

At the same time, they offer a high level of robustness and reliability in very demanding industrial environments and additionally benefit from minimal maintenance requirements and low maintenance costs.

NASA Images Solar System Collection Ames Research Center. Brooklyn Museum. Full text of "Langley aerospace test highlights, " See other formats. Laser surface velocimeters use the Doppler principle to evaluate the laser light scattered back from a moving object.

Two laser beams superimposed on the sur. Condensation and its growth down the test-section of the Langley m transonic cryogenic tunnel. HALL; Wake flow measurements with a mobile laser Doppler velocimeter system.

D Plus; No Access Measurements in the turbulent boundary layer of a yawed, spinning body of revolution at Mach with a laser velocimeter and impact probe. Laser Doppler Velocimetery (LDV) is a technique used to measure the instantaneous velocity of a flow field.

This technique, like PIV is non-intrusive and can measure all the three velocity components. The laser Doppler velocimeter sends a monochromatic laser beam toward the target and collects the reflected radiation. NASA Images Solar System Collection Ames Research Center Brooklyn Museum Full text of " NASA Technical Reports Server (NTRS) Advanced Turboprop Project ".ProSpeed LSV Laser Surface Velocimeter With the next generation optical speed and length sensor ProSpeed LSV with enhanced connectivity and extended working distances up to 3 meters, the control over your production process is at your fingertips – anywhere and anytime.Laser Doppler velocimetry, also known as laser Doppler anemometry, is the technique of using the Doppler shift in a laser beam to measure the velocity in transparent or semi-transparent fluid flows or the linear or vibratory motion of opaque, reflecting surfaces.

The measurement with laser Doppler anemometry is absolute and linear with velocity and requires no pre-calibration.