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A Method For Measuring Temperatures And Densities In Hypersonic Wind Tunnel Air Flows Using Laser Induced O2 Fluorescence
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Book Synopsis A Method for Measuring Temperatures and Densities in Hypersonic Wind Tunnel Air Flows Using Laser-induced O2 Fluorescence by : Gabriel Laufer
Download or read book A Method for Measuring Temperatures and Densities in Hypersonic Wind Tunnel Air Flows Using Laser-induced O2 Fluorescence written by Gabriel Laufer and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser-spectroscopic Measurement Techniques for Hypersonic, Turbulent Wind Tunnel Flows by :
Download or read book Laser-spectroscopic Measurement Techniques for Hypersonic, Turbulent Wind Tunnel Flows written by and published by . This book was released on 1992 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temperature measurements in hypersonic air flows using laser-induced O2 fluorescence by : Gabriel Laufer
Download or read book Temperature measurements in hypersonic air flows using laser-induced O2 fluorescence written by Gabriel Laufer and published by . This book was released on 1988 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781792670725 Total Pages :30 pages Book Rating :4.6/5 (77 download)
Book Synopsis Laser-Spectroscopic Measurement Techniques for Hypersonic, Turbulent Wind Tunnel Flows by : National Aeronautics and Space Adm Nasa
Download or read book Laser-Spectroscopic Measurement Techniques for Hypersonic, Turbulent Wind Tunnel Flows written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-12-29 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review is given of the nature, present status, and capabilities of two laser spectroscopic methods for the simultaneous measurement of temperature, density, and their fluctuations owing to turbulence in high speed wind tunnel flows. One method is based on the two frequency excitation of nitric oxide seeded into a nitrogen flow, using tunable dye lasers. The second, more recent method relies on the excitation of oxygen in air flows using a tunable, ArF excimer laser. Signal are obtained from both the laser induced fluorescence and from Raman scattering of the same laser pulse. Measurements are demonstrated in the turbulent boundary layer of a Mach-2 channel flow. Mckenzie, Robert L. and Fletcher, Douglas G. Ames Research Center NASA-TM-103928, A-92076, NAS 1.15:103928 RTOP 505-59-40...
Book Synopsis Optical Measurements of Fluctuating Temperatures in a Supersonic Turbulent Flow Using One- and Two-photon, Laser-induced Fluorescence by :
Download or read book Optical Measurements of Fluctuating Temperatures in a Supersonic Turbulent Flow Using One- and Two-photon, Laser-induced Fluorescence written by and published by . This book was released on 1984 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Trends in Instrumentation for Hypersonic Research by : A. Boutier
Download or read book New Trends in Instrumentation for Hypersonic Research written by A. Boutier and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the growing interest in hypersonic flows, the AGARD Fluid Dynamics Panel initiated a sub-working group on instrumentation for hypersonics in 1989. This sub-group, chaired by J. WENDT (VKI -Belgium), was composed of: A. BOUTIER (ONERA -France), K. BUTEFISCH (DLR -Germany), R. CATTOLICA (SANDIA Lab. -USA), V. CLINE (AEDC -USA), A. GIRARD (ONERA -France), R. McKENZIE (NASA Ames -USA), S. OCHELTREE (NASA Langley -USA) and G. SMEETS (ISL -Franco-German Inst.). As a result of several meetings, the idea came to organize this workshop, 27th April - 1st May 1992, on "New Trends in Instrumentation for Hypersonic Research", at Le Fauga-Mauzac ONERA center, in France, where the new hot-shot arc-heated facility F4, as well as a new conference building, were recently completed. This workshop has been organized in close connection with the AGARD FDP Symposium to be held in Torino 4 - 8 May 1992 on "Theoretical and Experimental Methods in Hypersonic Flows": the main conclusions and ideas expressed by the papers and during the discussions of this workshop are reported in session 7 and have been presented in Torino in a special Instrumentation session. As chairman of this workshop, I express many thanks to the Organizing Committee composed of Karl BUTEFISCH, Andre GIRARD, Stewart OCHELTREE and John WENDT for their very constructive help, leading to a meeting that was recognized to be very fruitful for all the participants.
Book Synopsis Measurements of Density, Temperature, and Their Fluctuations in Turbulent Supersonic Flow Using UV Laser Spectroscopy by :
Download or read book Measurements of Density, Temperature, and Their Fluctuations in Turbulent Supersonic Flow Using UV Laser Spectroscopy written by and published by . This book was released on 1992 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonintrusive measurements of density, temperature, and their turbulent fluctuation levels have been obtained in the boundary layer of an unseeded, Mach 2 wind tunnel flow. The spectroscopic techniques that was used to make the measurements is based on the combination of laser-induced oxygen fluorescence and Raman scattering by oxygen and nitrogen from the same laser pulse. Results from this demonstration experiment are compared with previous measurements obtained in the same facility using conventional probes and an earlier spectroscopic technique. Densities and temperatures measured with the current technique agree with the previous surveys to within 3% and 2%, respectively. The fluctuation amplitudes for both variable agree with the measurements obtained using the earlier spectroscopic technique and show evidence of an unsteady, weak shock wave that perturbs the boundary layer. (Author).
Book Synopsis Applied Optical Measurements by : Markus Lehner
Download or read book Applied Optical Measurements written by Markus Lehner and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a compilation of important optical techniques applied to experiments in heat and mass transfer, multiphase flow and combustion. The emphasis of this book is on the application of these techniques to various engineering problems. The contributions are aiming to provide practicing engineers, both in industry and research, with the recent state of science in the application of advanced optical measurements. The book is written by selected specialists representing leading experts in this field who present new information for the possibilities of these techniques and give stimulation of new ideas for their application.
Book Synopsis Applied Combustion Diagnostics by : KoHse-HoingHaus
Download or read book Applied Combustion Diagnostics written by KoHse-HoingHaus and published by Taylor & Francis US. This book was released on 2002-04-26 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: The editors have assembled a world-class group of contributors who address the questions the combustion diagnostic community faces. They are chemists who identify the species to be measured and the interfering substances that may be present; physicists, who push the limits of laser spectroscopy and laser devices and who conceive suitable measurement schemes; and engineers, who know combustion systems and processes. This book assists in providing guidance for the planning of combustion experiments, in judging research strategies and in conceiving new ideas for combustion research. It provides a snapshot of the available diagnostic methods and thier typical applications from the perspective of leading experts in the field.
Book Synopsis Flow Visualization: Techniques And Examples (2nd Edition) by : Alexander J Smits
Download or read book Flow Visualization: Techniques And Examples (2nd Edition) written by Alexander J Smits and published by World Scientific. This book was released on 2012-08-02 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the 2nd edition of the book, Flow Visualization: Techniques and Examples, which was published by Imperial College Press in 2000. Many of the chapters have been revised and updated to take into consideration recent changes in a number of flow visualization and measurement techniques, including an updated high quality flow gallery. Unique among similar publications, this book focuses on the practical rather than theoretical aspects. Obtaining high quality flow visualization results is, in many ways, more of an art than a science, and experience plays a key deciding role. The depth and breadth of the material will make this book invaluable to readers of all levels of experience in the field.
Book Synopsis Laser-Raman Flow-field Diagnostics of Two Large Hypersonic Test Facilities by : W. D. Williams
Download or read book Laser-Raman Flow-field Diagnostics of Two Large Hypersonic Test Facilities written by W. D. Williams and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-Raman scattering has been utilized to discover nonequilibrium N2 vibrational levels in a continuous, resistance-heated wind tunnel (Tunnel C) and in an arc-heated wind tunnel (Tunnel F). Vibrational temperatures of up to two times the bulk reservoir temperature have been measured in the Tunnel F free stream. A double-diaphragm device for delay of the Tunnel F nozzle expansion was found to significantly reduce the vibrational temperature level. In tunnel C, the vibrational temperatures were found to be dependent upon the water vapor concentration in the flow. It is hypothesized that water vapor-induced de-excitation of the vibrationally excited nitrogen molecules results in a significant rise in local static temperature and corresponding reduction in Mach number. (Author).
Book Synopsis Application of Advanced Laser Diagnostics to Hypersonic Wind Tunnels and Combustion Systems by :
Download or read book Application of Advanced Laser Diagnostics to Hypersonic Wind Tunnels and Combustion Systems written by and published by . This book was released on 2009 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: This LDRD was a Sandia Fellowship that supported Andrea Hsu's PhD research at Texas A & M University and her work as a visitor at Sandia's Combustion Research Facility. The research project at Texas A & M University is concerned with the experimental characterization of hypersonic (Mach>5) flowfields using experimental diagnostics. This effort is part of a Multidisciplinary University Research Initiative (MURI) and is a collaboration between the Chemistry and Aerospace Engineering departments. Hypersonic flight conditions often lead to a non-thermochemical equilibrium (NTE) state of air, where the timescale of reaching a single (equilibrium) Boltzmann temperature is much longer than the timescale of the flow. Certain molecular modes, such as vibrational modes, may be much more excited than the translational or rotational modes of the molecule, leading to thermal-nonequilibrium. A nontrivial amount of energy is therefore contained within the vibrational mode, and this energy cascades into the flow as thermal energy, affecting flow properties through vibrational-vibrational (V-V) and vibrational-translational (V-T) energy exchanges between the flow species. The research is a fundamental experimental study of these NTE systems and involves the application of advanced laser and optical diagnostics towards hypersonic flowfields. The research is broken down into two main categories: the application and adaptation of existing laser and optical techniques towards characterization of NTE, and the development of new molecular tagging velocimetry techniques which have been demonstrated in an underexpanded jet flowfield, but may be extended towards a variety of flowfields. In addition, Andrea's work at Sandia National Labs involved the application of advanced laser diagnostics to flames and turbulent non-reacting jets. These studies included quench-free planar laser-induced fluorescence measurements of nitric oxide (NO) and mixture fraction measurements via Rayleigh scattering.
Download or read book NASA Tech Briefs written by and published by . This book was released on 1995 with total page 1468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Single-pulse Gas Thermometry at Low Temperatures Using Two-photon Laser-induced Fluorescence in NO/N2 Mixtures by :
Download or read book Single-pulse Gas Thermometry at Low Temperatures Using Two-photon Laser-induced Fluorescence in NO/N2 Mixtures written by and published by . This book was released on 1983 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Springer Handbook of Experimental Fluid Mechanics by : Cameron Tropea
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.
Book Synopsis Measurement Techniques for Hypersonic Flows by :
Download or read book Measurement Techniques for Hypersonic Flows written by and published by . This book was released on 1990 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heat Transfer Measurements in Cold Wind Tunnels by : H. L. Moody
Download or read book Heat Transfer Measurements in Cold Wind Tunnels written by H. L. Moody and published by . This book was released on 1982 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigations were performed on instrumentation concepts for the purpose of acquiring heat transfer and recovery temperature measurements on models to be tested in cold wind tunnels. The problem in cold wind tunnels is the recovery and model initial (or ambient) temperature can be of the same level so that the temperature excursion during test is generally negligible. A literature search was performed from which 13 candidate instrumentation concepts were identified for further investigation. Detailed analysis and design efforts were performed on the candidates to identify measurement errors, fabrication, data reduction procedures and costs. Based on technical merit and cost, four sensors were selected for cold wind tunnel applications. These sensors include the 2-D foil (Gardon) and wafer thermopile calorimeters, liquid crystals and thermal phosphors.
