Download or read book Velocity Field Measurements of a Jet Confined to a Swirling Flow Using Digital Particle Image Velocimetry Cinematography written by Federico Frigerio (Ph. D.) and published by . This book was released on 1997 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Particle Image Velocimetry written by Giovanna Cavazzini and published by BoD – Books on Demand. This book was released on 2012-05-23 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Particle Image Velocimetry is undoubtedly one of the most important technique in Fluid-dynamics since it allows to obtain a direct and instantaneous visualization of the flow field in a non-intrusive way. This innovative technique spreads in a wide number of research fields, from aerodynamics to medicine, from biology to turbulence researches, from aerodynamics to combustion processes. The book is aimed at presenting the PIV technique and its wide range of possible applications so as to provide a reference for researchers who intended to exploit this innovative technique in their research fields. Several aspects and possible problems in the analysis of large- and micro-scale turbulent phenomena, two-phase flows and polymer melts, combustion processes and turbo-machinery flow fields, internal waves and river/ocean flows were considered.
Download or read book Particle Image Velocimetry written by Markus Raffel and published by Springer. This book was released on 2018-04-03 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: This immensely practical guide to PIV provides a condensed, yet exhaustive guide to most of the information needed for experiments employing the technique. This second edition has updated chapters on the principles and extra information on microscopic, high-speed and three component measurements as well as a description of advanced evaluation techniques. What’s more, the huge increase in the range of possible applications has been taken into account as the chapter describing these applications of the PIV technique has been expanded.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Whole field Velocity Measurements in a Turbulent Free surface Jet written by John O. Scherer and published by . This book was released on 1995 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1993 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle Image Velocimetry written by Ronald J. Adrian and published by Cambridge University Press. This book was released on 2011 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle image velocimetry, or PIV, refers to a class of methods used in experimental fluid mechanics to determine instantaneous fields of the vector velocity by measuring the displacements of numerous fine particles that accurately follow the motion of the fluid. Although the concept of measuring particle displacements is simple in essence, the factors that need to be addressed to design and implement PIV systems that achieve reliable, accurate, and fast measurements and to interpret the results are surprisingly numerous. The aim of this book is to analyze and explain them comprehensively.
Download or read book Doppler Global Velocimetry Measurements for Supersonic Flow Fields written by James F. Meyers and published by BiblioGov. This book was released on 2013-07 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of Doppler Global Velocimetry (DGV) to high-speed flows has its origins in the original development of the technology by Komine et al (1991). Komine used a small shop-air driven nozzle to generate a 200 m/s flow. This flow velocity was chosen since it produced a fairly large Doppler shift in the scattered light, resulting in a significant transmission loss as the light passed through the Iodine vapor. This proof-of-concept investigation showed that the technology was capable of measuring flow velocity within a measurement plane defined by a single-frequency laser light sheet. The effort also proved that velocity measurements could be made without resolving individual seed particles as required by other techniques such as Fringe- Type Laser Velocimetry and Particle Image Velocimetry. The promise of making planar velocity measurements with the possibility of using 0.1-micron condensation particles for seeding, Dibble et al (1989), resulted in the investigation of supersonic jet flow fields, Elliott et al (1993) and Smith and Northam (1995) - Mach 2.0 and 1.9 respectively. Meyers (1993) conducted a wind tunnel investigation above an inclined flat plate at Mach 2.5 and above a delta wing at Mach 2.8 and 4.6. Although these measurements were crude from an accuracy viewpoint, they did prove that the technology could be used to study supersonic flows using condensation as the scattering medium. Since then several research groups have studied the technology and developed solutions and methodologies to overcome most of the measurement accuracy limitations.
Download or read book Three Dimensional Velocity and Vorticity Measuring and Image Analysis Techniques written by Th. Dracos and published by Springer Science & Business Media. This book was released on 1996-10-31 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of this volume reflect to a large extent the efforts made by a group of Institutes at the ETH Zürich to develop new techniques for measurements of flows in fluids in the last decade. The motivation came from the study of tr~sport and mixing processes in natural and industrial systems. One of the characteristic properties of turbulence is its high mixing efficiency. The techniques developed are therefore suitable, although not exclusively, for turbulence measurements. They can be subdivided into point-measurements and field-measurements. The aim of the point-measurements developed is to determine the three components of the velocity and all their first derivatives with good temporal resolution and accuracy in turbulent flows. The old and weIl established method of hot-wire anemometry was used for this purpose. One of the main achievements in this context is the construction of miniature multi-wire probes. This technique was introduced to the Institute of Hydromechanics and Water Resources Management of ETH Zürich by Profs. A. Tsinober and E. Kit from Tel-Aviv University. This was made possible by the generous financial support by ETH, for which I would like to express my gratitude on this occasion. In addition, Dr. F.E. Joergensen from DANTEC contributed an example of recent developments in the hardware ofConstant Temperature Anemometry (CTA), for which I am very thankful.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 1126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Velocity Field Measurements Using Digital Particle Image Velocimetric System written by A. K. Kansal and published by . This book was released on 2010 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book De Focusing Digital Particle Image Velocimetry System written by and published by . This book was released on 2003 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work under a Grant from DURIP is to build and test a velocimetry system in support of an AFOSR Grant for making three-dimensional, three-component velocity field measurements in supersonic transverse jet injection in the Caltech Ludwieg Tube. All of the components of the system have been purchased, and those that needed to be manufactured in the machine shop have been designed and built. Improvements in hardware, recognized during the design and construction, both from practical points of view and from the point of view of comparison of data with computation, have led to changes in design. These were implemented, but require extensive new software that is being generated prior to the calibration of the system.
Download or read book Characterization of Three Stream Jet Flow Fields written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-13 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow-field measurements were conducted on single-, dual- and three-stream jets using two-component and stereo Particle Image Velocimetry (PIV). The flow-field measurements complimented previous acoustic measurements. The exhaust system consisted of externally-plugged, externally-mixed, convergent nozzles. The study used bypass-to-core area ratios equal to 1.0 and 2.5 and tertiary-to-core area ratios equal to 0.6 and 1.0. Axisymmetric and offset tertiary nozzles were investigated for heated and unheated high-subsonic conditions. Centerline velocity decay rates for the single-, dual- and three-stream axisymmetric jets compared well when axial distance was normalized by an equivalent diameter based on the nozzle system total exit area. The tertiary stream had a greater impact on the mean axial velocity for the small bypass-to-core area ratio nozzles than for large bypass-to-core area ratio nozzles. Normalized turbulence intensities were similar for the single-, dual-, and three-stream unheated jets due to the small difference (10 percent) in the core and bypass velocities for the dual-stream jets and the low tertiary velocity (50 percent of the core stream) for the three-stream jets. For heated jet conditions where the bypass velocity was 65 percent of the core velocity, additional regions of high turbulence intensity occurred near the plug tip which were not present for the unheated jets. Offsetting the tertiary stream moved the peak turbulence intensity levels upstream relative to those for all axisymmetric jets investigated. Henderson, Brenda S. and Wernet, Mark P. Glenn Research Center WBS 110076.02.03.04.02
Download or read book Particle Image Velocimetry written by and published by . This book was released on 1997 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report developed under SBIR contract. A two-color particle imaging velocimetry system was demonstrated for obtaining two-dimensional velocity measurements in a subsonic reacting flow and in a supersonic flowfield. Data was obtained using three different camera systems, an 8-mm video camera, a digital color CCD camera system and a 35-mm camera. The data obtained from the wall boundary layer region in the supersonic wind tunnel showed good correlation with LDV data. The flow in the wake region of the flame holder was investigated using the PIV system developed. The results obtained through these experiments showed that the PIV system was capable of resolving the flow information in the highly turbulent region with a high degree of accuracy. Values of shear layer stresses behind the bluff body region were also calculated from the PIV data. Reacting flow experiments showed the ability of the PIV system to resolve velocity fields in a highly turbulent, large gradient flow regime. The software yielded RMS fluctuations in the 1.5% range which is less than the 3% limit widely reported in the literature. Taitech, Inc. is currently commercializing the PIV system developed in this contract.
Download or read book Optimization of Particle Image Velocimetry Measurements Using the In cylinder Velocity Flow Fields in an Optical Engine written by David M. Chmiel and published by . This book was released on 2000 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Research work was performed in cooperation with Delphi Automotive Systems to optimize particle image velocimetry (PIV) measurements using the in-cylinder velocity flow fields in Delphi's optical engine"--Abstract.
Download or read book Springer Handbook of Experimental Fluid Mechanics written by Cameron Tropea and published by Springer Science & Business Media. This book was released on 2007-10-09 with total page 1570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accompanying DVD-ROM contains ... "all chapters of the Springer Handbook."--Page 3 of cover.
Download or read book The Development of Laser Speckle Velocimetry for the Study of Vortical Flows written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-11-14 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: A research program was undertaken to develop a new experimental technique commonly known as particle image displacement velocity (PIVD) to measure an instantaneous two dimensional velocity field in a selected plane of flow field. This technique was successfully developed and applied to the study of several aerodynamic problems. A detailed description of the technique and a broad review of all the research activity carried out in this field are reported. A list of technical publications is also provided. The application of PIDV to unsteady flows with large scale structures is demonstrated in a study of the temporal evolution of the flow past an impulsively started circular cylinder. The instantaneous two dimensional flow in the transition region of a rectangular air jet was measured using PIDV and the details are presented. This experiment clearly demonstrates the PIDV capability in the measurement of turbulent flows. Preliminary experiments were also conducted to measure the instantaneous flow over a circular bump in a transonic flow. Several other experiments now routinely use PIDV as a non-intrustive measurement technique to obtain instantaneous two dimensional velocity fields. Krothapalli, A. Unspecified Center FLOW DISTRIBUTION; LASERS; SPECKLE PATTERNS; TURBULENT FLOW; TWO DIMENSIONAL FLOW; UNSTEADY FLOW; VELOCITY MEASUREMENT; AIR JETS; CIRCULAR CYLINDERS; DISPLACEMENT; PARTICLE IMAGE VELOCIMETRY; TRANSONIC FLOW; VELOCITY DISTRIBUTION; VORTICES...
