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Temperature And Pressure Dependence Of Signal Amplitudes For Electrostriction Laser Induced Thermal Acoustics
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Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781794248335 Total Pages :32 pages Book Rating :4.2/5 (483 download)
Book Synopsis Temperature and Pressure Dependence of Signal Amplitudes for Electrostriction Laser-Induced Thermal Acoustics by : National Aeronautics and Space Adm Nasa
Download or read book Temperature and Pressure Dependence of Signal Amplitudes for Electrostriction Laser-Induced Thermal Acoustics written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-18 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relative signal strength of electrostriction-only (no thermal grating) laser-induced thermal acoustics (LITA) in gas-phase air is reported as a function of temperature T and pressure P. Measurements were made in the free stream of a variable Mach number supersonic wind tunnel, where T and P are varied simultaneously as Mach number is varied. Using optical heterodyning, the measured signal amplitude (related to the optical reflectivity of the acoustic grating) was averaged for each of 11 flow conditions and compared to the expected theoretical dependence of a pure-electrostriction LITA process, where the signal is proportional to the square root of [P*P /( T*T*T)]. Herring, Gregory C. Langley Research Center NASA/TM-2015-218762, L-20562, NF1676L-21439
Book Synopsis Temperature and pressure dependence of signal amplitudes for electrostriction laser-induced thermal acoustics by : Gregory C. Herring
Download or read book Temperature and pressure dependence of signal amplitudes for electrostriction laser-induced thermal acoustics written by Gregory C. Herring and published by . This book was released on 2015 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser-induced Thermal Acoustics by : Eric B. Cummings
Download or read book Laser-induced Thermal Acoustics written by Eric B. Cummings and published by . This book was released on 1995 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser-Induced Thermal Acoustics (LITA): Four-Wave Mixing Measurement of Sound Speed, Thermal Diffusivity, and Viscosity by :
Download or read book Laser-Induced Thermal Acoustics (LITA): Four-Wave Mixing Measurement of Sound Speed, Thermal Diffusivity, and Viscosity written by and published by . This book was released on 1994 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-induced thermal acoustics (LITA) is a promising optical four- wave mixing technique for gasdynamic measurement. The X(3) nonlinear process is a sequence of two opto-acoustic effects, electrostriction and absorption/rapid- thermalization, and the acousto-optic effect. The evolution of the laser-induced acoustic structures temporally modulates X(3) and thereby the LITA signal. Time resolution of the signal provides the sound speed, thermal diffusivity, and acoustic damping rate, along with information about atomic or molecular energy transfer rates. LITA can also measure spectra of both the real and imaginary gas susceptibility. The physics of LITA is discussed and the derivation is sketched of a simple analytical expression that accurately describes both the magnitude and time history of the LITA signal. Early experimental results are presented. Sound speeds accurate to 0.5% and transport properties accurate to 30% have been measured in a single-shot without calibration. More realistic modeling should dramatically improve transport-property measurement. LITA spectra have been taken of weak spectral lines of NO2 in concentrations less than 50 ppb. Signal reflectivities as high as 0.0001 have been estimated. New applications of LITA, including velocimetry, are suggested. LITA, Four-wave mixing, Thermal grating, Single-shot measurement, Velocimetry.
Book Synopsis Laser Spectroscopy V by : A. R. W. McKellar
Download or read book Laser Spectroscopy V written by A. R. W. McKellar and published by Springer. This book was released on 2013-06-05 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fifth International Conference on Laser Spectroscopy or VICOLS, was held at Jasper Park Lodge, in Jasper, Canada, June 29 to July 3, 1981. Following the tradition of the previous conferences in Vail, Megeve, Jackson Lake, and Rottach-Egern, it was hoped that VICOLS would provide an opportunity for act ive scientists to meet in an informal atmosphere for discussions of recent developments and applications in laser spectroscopy. The excellent conference facilities and remote location of Jasper Park Lodge in the heart of the Canadian Rockies, amply fulfilled these expectations. The conference was truly international, with 230 scientists from 19 countries participating. The busy program of invited talks lasted four days, with two evening sessions, one a panel discussion on Rydberg state spectro scopy, the other a lively poster session of approximately 60 post-deadline papers. We wish to thank all of the participants for their outstanding contribu tions and for preparation of their papers, now available to a wider audience. Our thanks go to the members of the International Steering Committee for their suggestions and recommendations. We are especially pleased to have held this conference under the auspices of the International Union of Pure and Applied Physics. VICOLS would not have been possible with out the financial support of the Natural Sciences and Engineering Research Council of Canada, and the Office of Naval Research and Air Force Office of Scientific Research of the United States* of America.
Book Synopsis AIAA Journal by : American Institute of Aeronautics and Astronautics
Download or read book AIAA Journal written by American Institute of Aeronautics and Astronautics and published by . This book was released on 2002 with total page 1302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal of the Optical Society of America by :
Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1991 with total page 1066 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photons Plus Ultrasound written by and published by . This book was released on 2007 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 36th Aerospace Sciences Meeting & Exhibit by :
Download or read book 36th Aerospace Sciences Meeting & Exhibit written by and published by . This book was released on 1998 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 33rd Aerospace Sciences Meeting & Exhibit by :
Download or read book 33rd Aerospace Sciences Meeting & Exhibit written by and published by . This book was released on 1995 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applied Combustion Diagnostics by : Katharina Kohse-Hoinghaus
Download or read book Applied Combustion Diagnostics written by Katharina Kohse-Hoinghaus and published by CRC Press. This book was released on 2002-04-26 with total page 734 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 measuremen
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 1973 with total page 888 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.
Book Synopsis Laser Diagnostics for Combustion Temperature and Species by : Alan C. Eckbreth
Download or read book Laser Diagnostics for Combustion Temperature and Species written by Alan C. Eckbreth and published by CRC Press. This book was released on 1996-10-10 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on spectroscopically-based, spatially-precise, laser techniques for temperature and chemical composition measurements in reacting and non-reacting flows, this book makes these powerful and important new tools in combustion research
Book Synopsis Quantum Optomechanics by : Warwick P. Bowen
Download or read book Quantum Optomechanics written by Warwick P. Bowen and published by CRC Press. This book was released on 2015-11-18 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by leading experimentalist Warwick P. Bowen and prominent theoretician Gerard J. Milburn, Quantum Optomechanics discusses modern developments in this novel field from experimental and theoretical standpoints. The authors share their insight on a range of important topics, including optomechanical cooling and entanglement; quantum limits on
Book Synopsis Applied Underwater Acoustics by : Thomas Neighbors
Download or read book Applied Underwater Acoustics written by Thomas Neighbors and published by Elsevier. This book was released on 2017-01-19 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applied Underwater Acoustics meets the needs of scientists and engineers working in underwater acoustics and graduate students solving problems in, and preparing theses on, topics in underwater acoustics. The book is structured to provide the basis for rapidly assimilating the essential underwater acoustic knowledge base for practical application to daily research and analysis. Each chapter of the book is self-supporting and focuses on a single topic and its relation to underwater acoustics. The chapters start with a brief description of the topic’s physical background, necessary definitions, and a short description of the applications, along with a roadmap to the chapter. The subtopics covered within individual subchapters include most frequently used equations that describe the topic. Equations are not derived, rather, assumptions behind equations and limitations on the applications of each equation are emphasized. Figures, tables, and illustrations related to the sub-topic are presented in an easy-to-use manner, and examples on the use of the equations, including appropriate figures and tables are also included. Provides a complete and up-to-date treatment of all major subjects of underwater acoustics Presents chapters written by recognized experts in their individual field Covers the fundamental knowledge scientists and engineers need to solve problems in underwater acoustics Illuminates, in shorter sub-chapters, the modern applications of underwater acoustics that are described in worked examples Demands no prior knowledge of underwater acoustics, and the physical principles and mathematics are designed to be readily understood by scientists, engineers, and graduate students of underwater acoustics Includes a comprehensive list of literature references for each chapter
Book Synopsis Acoustics for Engineers by : Ning Xiang
Download or read book Acoustics for Engineers written by Ning Xiang and published by Springer Nature. This book was released on 2021-11-06 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides materials for an introductory course in Engineering Acoustics for students with a basic knowledge of mathematics. The contents are based on extensive teaching experience at the graduate level. Each of the 14 main chapters deals with a well-defined topic and represents the material for a two-hour lecture. The chapters alternate between more theoretical and more application-oriented concepts. The presentation is organized to be suitable for self-study as well. For this third edition, the complete text and many figures have been revised. Several current amendments take account of advancements in the field. Further, a completely new chapter has been added which presents approaches and solutions to all assigned exercise problems. The new chapter offers the opportunity to explore the underlying theoretical background in more detail. However, the study of the problems and their proposed solutions is no prerequisite for comprehending the material presented in the book's lecture part.
