The Use Of A Laser Doppler Velocimeter In Supersonic Flow
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| Author | : William Joseph Yanta |
| Publisher | : |
| Total Pages | : 64 |
| Release | : 1971 |
| Genre | : Aerodynamics, Supersonic |
| ISBN | : |
Download The Use of a Laser Doppler Velocimeter in Supersonic Flow Book in PDF, Epub and Kindle
Results are presented for an experimental program which investigated the application of an LDV technique in supersonic flows. This paper presents an analysis of the behavior of light-scattering particles in rapidly accelerating or shock decelerated flows, an evaluation of particle production techniques and the results of several velocity measurements. Measurements included the velocity distribution along the nozzle centerline and flow over a diamond airfoil in a Mach 3 tunnel and velocity profiles for a turbulent boundary layer in a Mach 4.8 facility. It is demonstrated that LDV measurements can be made consistently with errors of less than five percent if the particle lag is considered. (Author).
| Author | : William J. Yanta |
| Publisher | : |
| Total Pages | : 28 |
| Release | : 1971 |
| Genre | : |
| ISBN | : |
Download The Use of a Laser Doppler Velocimeter in Supersonic Flow Book in PDF, Epub and Kindle
Results are presented for an experimental program which investigated the application of an LDV technique in supersonic flows. This paper presents an analysis of the behavior of light-scattering particles in rapidly accelerating or shock decelerated flows, an evaluation of particle production techniques and the results of several velocity measurements. Measurements included the velocity distribution along the nozzle centerline and flow over a diamond airfoil in a Mach 3 tunnel and velocity profiles for a turbulent boundary layer in a Mach 4.8 facility. It is demonstrated that LDV measurements can be made consistently with errors of less than five percent if the particle lag is considered. (Author).
| Author | : J. C. Donaldson |
| Publisher | : |
| Total Pages | : 55 |
| Release | : 1987 |
| Genre | : |
| ISBN | : |
Download Laser Doppler Velocimeter Application in Supersonic Boundary-Layer Flow Book in PDF, Epub and Kindle
Laser Doppler velocimeter techniques have been investigated for nonintrusive measurements of cone boundary-layer mean-velocity profiles in supersonic flow. The investigation was performed in the AEDC Supersonic Wind Tunnel (A) at a free-stream Mach number of 4, using olive-oil droplets to seed the tunnel flow. The basis for the evaluation of the LDV results was a set of velocity profiles obtained using conventional probing techniques. Laminar, transitional, and turbulent boundary layers on a 7-deg (half-angle) sharp-cone model were included in this study. The results obtained in this investigation demonstrate that mean-velocity profiles can be obtained within acceptable limits of uncertainty provided (1) seed particles of appropriate size are found in tunnel flow or can be added to the flow and (2) a systematic editing procedure is available, when the results are evaluated, to eliminate velocities of relatively low probability and effects of spurious noise. (Author).
| Author | : Luther R. Gartrell |
| Publisher | : |
| Total Pages | : 28 |
| Release | : 1993 |
| Genre | : |
| ISBN | : |
Download Application of Laser Doppler Velocimeter to Chemical Vapor Laser System Book in PDF, Epub and Kindle
| Author | : Ronald J. Adrian |
| Publisher | : Society of Photo Optical |
| Total Pages | : 617 |
| Release | : 1993 |
| Genre | : Technology & Engineering |
| ISBN | : 9780819412973 |
Download Selected Papers on Laser Doppler Velocimetry Book in PDF, Epub and Kindle
SPIE Milestones are collections of seminal papers from the world literature covering important discoveries and developments in optics and photonics.
| Author | : Robert J. Hallermeier |
| Publisher | : |
| Total Pages | : 8 |
| Release | : 1973 |
| Genre | : Fluid dynamic measurements |
| ISBN | : |
Download Design Considerations for a 3-D Laser Doppler Velocimeter for Studying Gravity Waves in Shallow Water Book in PDF, Epub and Kindle
| Author | : Warren H. Stevenson |
| Publisher | : |
| Total Pages | : 580 |
| Release | : 1972 |
| Genre | : Fluid dynamic measurements |
| ISBN | : |
Download The Use of the Laser Doppler Velocimeter for Flow Measurements Book in PDF, Epub and Kindle
| Author | : C. E. Fuller |
| Publisher | : |
| Total Pages | : 70 |
| Release | : 1970 |
| Genre | : |
| ISBN | : |
Download Development Testing and Application of a Three-dimensional Laser Doppler Velocimeter for the Measurement of Gas Flows Book in PDF, Epub and Kindle
| Author | : National Aeronautics and Space Administration (NASA) |
| Publisher | : Createspace Independent Publishing Platform |
| Total Pages | : 34 |
| Release | : 2018-07-05 |
| Genre | : |
| ISBN | : 9781722335045 |
Download Laser Doppler Velocimeter Measurements of Boundary Layer Velocity and Turbulent Intensities in Mach 2. 5 Flow Book in PDF, Epub and Kindle
In recent years, the interest in developing a high-speed civil transport has increased. This has led to an increase in research activity on compressible supersonic flows, in particular the boundary layer. The structure of subsonic boundary layers has been extensively documented using conditional sampling techniques which exploit the knowledge of both u and v velocities. Researchers using these techniques have been able to explore some of the complex three-dimensional motions which are responsible for Reynolds stress production and transport in the boundary layer. As interest in turbulent structure has grown to include supersonic flows, a need for simultaneous multicomponent velocity measurements in these flows has developed. The success of conditional analysis in determining the characteristics of coherent motions and structures in the boundary layer relies on accurate, simultaneous measurement of two instantaneous velocity components. Sewell, Jesse and Chew, Larry Unspecified Center NAG1-1402...
| Author | : William Joseph Yanta |
| Publisher | : |
| Total Pages | : 104 |
| Release | : 1973 |
| Genre | : Laser Doppler velocimeter |
| ISBN | : |
Download Turbulence Measurements with a Laser Doppler Velocimeter Book in PDF, Epub and Kindle
Turbulence measurements with a Laser Doppler Velocimeter (LDV) using the dual scatter or differential Doppler mode have been made in a subsonic, fully developed channel flow. The measurements were made using only those light scattering particles occurring naturally in air. Results include mean velocity profiles, turbulence intensities, Reynolds stress distributions and a skewness measurement of the velocity distribution function across the channel. Statistical techniques were used to obtain the various turbulence parameters. Guidelines have been established for the amount of data needed to obtain results with a specified accuracy and confidence level. Measurements have also been made to determine the particle-size distribution. An aerodynamic means was used to determine the size distribution, in contrast to the usual optical procedures. (Modified author abstract).
