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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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      <title>HYDRODYNAMIC DRAG OF THREE-DIMENSIONAL BODIES BY MEANS OF A LASER DOPPLER WAKE SURVEY</title>
      <link>https://trid.trb.org/View/71664</link>
      <description><![CDATA[An investigation of the application of Laser Doppler Anemometry to the determination of hydrodynamic drag by means of a wake survey is described.  The experimental study, which was limited to viscous drag, is discussed.  The particular objects studied were a MIT Series of yacht keels, with the without turbulence stimulation, at varying angles of attack, and varying Reynolds number.  A discussion is given of the theory relating to the calculation of drag from a wake velocity survey.  A series of guidelines are given for the use of the Laser Doppler Anemometer System for future studied in the MIT Water Tunnel facility.  Graphs and tabulated results of the calculated drag coefficients versus Reynolds number are given, along with a commentary on the particular results.]]></description>
      <pubDate>Wed, 03 May 1978 00:00:00 GMT</pubDate>
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      <title>MEASUREMENTS OF TWO-POINT VELOCITY CORRELATIONS IN A PIPE FLOW USING LASER ANEMOMETERS</title>
      <link>https://trid.trb.org/View/6381</link>
      <description><![CDATA[The purpose of the study has been to develop a laser anemometer system with the capability for measuring the instantaneous velocity at a point in a turbulent flow, and to use this device for the measurement of two-point velocity correlation functions.  In the investigation a 0.025 m diam pipe was used with a test medium of water in which was suspended a dilute concentration of small polystyrene latex spheres as scattering particles. Measurements of velocity correlations, mean velocity profiles and turbulence intensities were made at Reynolds numbers ranging from slightly above transition up to 18,100.]]></description>
      <pubDate>Sat, 20 Oct 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/6381</guid>
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      <title>LASER-DOPPLER ANEMOMETER MEASUREMENTS OF TURBULENCE IN DRAG REDUCING FLOWS</title>
      <link>https://trid.trb.org/View/8915</link>
      <description><![CDATA[The drag reduction, mean flow, and turbulence properties of several concentrations of Separan AP30 and water in a fully developed turbulent pipe flow were studied using a two-component laser-Doppler anemometer.  This measurement technique was chosen because of its inherent advantages over the traditional measuring techniques that have been used in previous studies of drag reducing flows.  A polymer injection technique was used.  A slurry of methanol and polymer powder was injected directly into the flowing water, providing a fresh, unaged polymer solution. (Author Modified Abstract)]]></description>
      <pubDate>Tue, 31 Jul 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/8915</guid>
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      <title>LASER DOPPLER ANEMOMETER FOR WATER TUNNEL APPLICATIONS</title>
      <link>https://trid.trb.org/View/12147</link>
      <description><![CDATA[A laser Doppler anemometer for three-dimensional velocity measurement in liquids and gases under a wide range of laboratory conditions has been developed.  The instrument is particularly well suited for water tunnel applications.  It is portable, easily aligned, and inexpensive (excluding electronic units).  It operates in backscatter or forward scatter mode.  In both cases all optical components, including laser and photomultiplier, remain on a common base.  The system has built-in traversing capability and an aiming device for visualizing the focal (test) point. Design details and representative velocity measurements are given.]]></description>
      <pubDate>Fri, 13 Apr 1973 00:00:00 GMT</pubDate>
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