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Analysis Of The Laser Doppler Measurement Technique For Application In Turbulent Flows
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Book Synopsis Analysis of the Laser Doppler Measurement Technique for Application in Turbulent Flows by : Lodewijk Helena Jozef Absil
Download or read book Analysis of the Laser Doppler Measurement Technique for Application in Turbulent Flows written by Lodewijk Helena Jozef Absil and published by . This book was released on 1995 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Analysis of the Laser Doppler Velocimeter and Its Application to the Measurement of Turbulence by : William K George (Jr)
Download or read book An Analysis of the Laser Doppler Velocimeter and Its Application to the Measurement of Turbulence written by William K George (Jr) and published by . This book was released on 1971 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: An operational Laser-Doppler Velocimeter is described and measurements of spectra in both laminar and turbulent flow are presented. (Author).
Book Synopsis LDA Application Methods by : Zhengji Zhang
Download or read book LDA Application Methods written by Zhengji Zhang and published by Springer Science & Business Media. This book was released on 2010-08-12 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: This technical book considers the application side of LDA techniques. Starting from the basic theories that are crucial for each LDA user, the main subject of the book is focused on diverse application methods. In details, it deals with universal methodical techniques that have been mostly developed in the last 15 years. The book thus gives for the first time an application reference for LDA users in improving the optical conditions and enhancing the measurement accuracies. It also provides the guidelines for simplifying the measurements and correcting measurement errors as well as for clarifying the application limits and extending the application areas of LDA techniques. Beside the treatments of some traditional optical and flow mechanical features influencing the measurement accuracies, the book shows a broad spectrum of LDA application methods in the manner of measuring the flow turbulence, resolving the secondary flow structures, and quantifying the optical aberrations at measurements of internal flows etc.. Thus, it also supports the further developments of both the hard- and software of LDA instrumentations.
Book Synopsis Laser Doppler and Phase Doppler Measurement Techniques by : H.-E. Albrecht
Download or read book Laser Doppler and Phase Doppler Measurement Techniques written by H.-E. Albrecht and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 741 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing the first comprehensive treatment, this book covers all aspects of the laser Doppler and phase Doppler measurement techniques, including light scattering from small particles, fundamental optics, system design, signal and data processing, tracer particle generation, and applications in single and two-phase flows. The book is intended as both a reference book for more experienced users as well as an instructional book for students. It provides ample material as a basis for a lecture course on the subject and represents one of the most comprehensive treatments of the phase Doppler technique to date. The book will serve as a valuable reference book in any fluid mechanics laboratory where the laser Doppler or phase Doppler techniques are used. This work reflects the authors' long practical experience in the development of the techniques and equipment, as the many examples confirm.
Book Synopsis Applications of Laser Doppler Techniques for Measurements in Large Flow Systems by : R. D. Lewis
Download or read book Applications of Laser Doppler Techniques for Measurements in Large Flow Systems written by R. D. Lewis and published by . This book was released on 1970 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the study was to develop the theoretical and experimental knowledge necessary to utilize the laser Doppler velocity measurement technique in large flow systems. Theoretical treatments were developed to allow prediction of the capabilities and limitations of the laser Doppler technique as applied to (1) use in the backscatter mode with no artificial contaminants in the flow; (2) localization of the measurement volume and its effects on the measurement of turbulence phenomena; and (3) degradation of the heterodyning efficiency due to long path lengths in optically inhomogeneous media. Experimental confirmation of theoretical predictions were carried out to demonstrate validity or to establish an experimental technique. (Author).
Book Synopsis Laser Systems in Flow Measurement by : Tariq Durrani
Download or read book Laser Systems in Flow Measurement written by Tariq Durrani and published by Springer. This book was released on 1977 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now well established that laser flow-measuring systems have important advantages over more conventional techniques both for industrial and laboratory applications. These fundamental advantages are indicated by the enormous research effort which has gone into their development over the last decade and by the number of commercial systems which have become available. Although the field is still developing, the most important theoretical results required for relating the system outputs to the fluid flow parameters have now been formulated and a book on the subject therefore seems timely. In the text we have tried to collect together the most important results both from our own papers and from publications by other authors and to present these in a concise and easily readable form. Emphasis has been placed on the fundamental theory and limitations associated with the various techniques rather than on detailed description of specific systems. We have also included a number of new results on areas such as photon counting in turbulent and periodic flows, frequency domain and time domain analysis of laser Doppler velocimeter signals, effect of background noise on system performance, and on cross-correlation techniques for diffusing flows.
Book Synopsis An analysis of the Laser-Doppler velocimeter and its application to the measurement of turbulence : thesis by : William Kenneth George
Download or read book An analysis of the Laser-Doppler velocimeter and its application to the measurement of turbulence : thesis written by William Kenneth George and published by . This book was released on 1971 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Velocimeter Measurements and Analysis in Turbulent Flows with Combustion. Part 3. A Correction Lens for Laser Doppler Measurements in a Cylindrical Tube by : H. D. Thompson
Download or read book Laser Velocimeter Measurements and Analysis in Turbulent Flows with Combustion. Part 3. A Correction Lens for Laser Doppler Measurements in a Cylindrical Tube written by H. D. Thompson and published by . This book was released on 1984 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: A lens was designed using analytical ray tracing techniques to correct aberrations caused by a cylindrical tube wall when measurements are made off the plane of symmetry with a Laser Doppler Velocimeter. The single element correction lens was found to work well and good results were obtained out to a normalized tube radius of r/R = 0.83. LDV measurements were made in three axisymmetric flow geometries: a turbulent flow in a straight pipe, a sudden expansion with diameter ratio 1.90:1, and a second sudden explosion with diameter ratio 2.70:1. Mean velocity and turbulence intensity were measured as well as Reynolds stress and turbulence kinetic energy. Numerical predictions of the flow field using the k-epsilon turbulence model were compared to the experimental measurements in the 1:90:1 sudden expansion. In the 2.70:1 sudden expansion, the presence of a secondary recirculation zone in the corner of the step was confirmed and velocity measurements were made in this region. (Author).
Book Synopsis Investigation of Two-dimensional Flow Measurements Using the Laser Doppler Technique by : R. D. Lewis
Download or read book Investigation of Two-dimensional Flow Measurements Using the Laser Doppler Technique written by R. D. Lewis and published by . This book was released on 1968 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specification of flow parameters in a moving fluid usually requires knowledge of velocity components in more than one dimension. Using the laser Doppler technique, velocity components may be measured with a great number of geometries. This study investigated combinations of geometries useful for constructing a two-dimensional velocimeter. Three systems underwent extensive study, two incident beam forward scatter, single incident beam forward scatter, and single incident beam forward and backward scatter. System parameters investigated experimentally and theoretically included cross-talk between beam polarization effects, relative scattering intensities, and measurement point constraints. Turbulent flow in a 4-inch-diameter pipe was used to demonstrate the measurement technique utilizing the single beam forward scatter system. Coordinate transformations between velocimeter coordinates and flow system coordinates were derived. (Author).
Book Synopsis Turbulence Measurements with a Laser Doppler Velocimeter by : William Joseph Yanta
Download or read book Turbulence Measurements with a Laser Doppler Velocimeter written by William Joseph Yanta and published by . This book was released on 1973 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Book Synopsis The General Hospital, St. John's, Newfoundland by :
Download or read book The General Hospital, St. John's, Newfoundland written by and published by . This book was released on 1986 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation and Application of Laser Doppler Velocity Profile Sensors Toward Measurements of Turbulent Shear Flows by : Katsuaki Shirai
Download or read book Investigation and Application of Laser Doppler Velocity Profile Sensors Toward Measurements of Turbulent Shear Flows written by Katsuaki Shirai and published by . This book was released on 2010 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Analysis of the Laser Doppler Velocimeter and Its Application to the Measurement of Turbulence by : William Kenneth George
Download or read book An Analysis of the Laser Doppler Velocimeter and Its Application to the Measurement of Turbulence written by William Kenneth George and published by . This book was released on 1971 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Use of a Laser Doppler Velocimeter in Supersonic Flow by : William Joseph Yanta
Download or read book The Use of a Laser Doppler Velocimeter in Supersonic Flow written by William Joseph Yanta and published by . This book was released on 1971 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Velocimetry in Fluid Mechanics by : Alain Boutier
Download or read book Laser Velocimetry in Fluid Mechanics written by Alain Boutier and published by John Wiley & Sons. This book was released on 2012-10-22 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: In fluid mechanics, velocity measurement is fundamental in order to improve the behavior knowledge of the flow. Velocity maps help us to understand the mean flow structure and its fluctuations, in order to further validate codes. Laser velocimetry is an optical technique for velocity measurements; it is based on light scattering by tiny particles assumed to follow the flow, which allows the local fluid flow velocity and its fluctuations to be determined. It is a widely used non-intrusive technique to measure velocities in fluid flows, either locally or in a map. 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. Post-processing of data allows us to extract synthetic information from measurements and to perform comparisons with results issued from CFD codes. The principles and characteristics of the different available techniques, all based on the scattering of light by tiny particles embedded in the flow, are described in detail; showing how they deliver different information, either locally or in a map, mean values and turbulence characteristics.
Book Synopsis Spectral Analysis of Turbulent Flows from LDA Measurements by : C. McDonnell
Download or read book Spectral Analysis of Turbulent Flows from LDA Measurements written by C. McDonnell and published by . This book was released on 1992 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Procedure for deriving the turbulence spectrum of a fluid flow from laser Doppler measurements are briefly reviewed. The flow in a small tube array is monitored using LDA measurements and the turbulence spectrum is calculated using both the correlation slotting technique and equal time sampling together with FFT based procedures. The letter is shown to give good results with considerable reduction in calculation time providing the sample rate is adequate. A comparison of the turbulence spectra for a flow in a heat exchanger array determined from both LDA and hot wire measurements indicates the limits of the procedures proposed.
