Download or read book CARS Measurements of Vibrational Energy Transfer in Nanosecond Pulse Electric Discharges in Nitrogen Air and Their Mixtures with Carbon Dioxide written by Yi-chen Hung and published by . This book was released on 2016 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vibrational relaxation of nitrogen accelerated by rapid energy transfer to CO2 is studied in the afterglow of a diffuse filament ns pulse discharge. Time-resolved N2(v=0-3) vibrational level populations and temperature are measured using broadband Coherent Anti-Stokes Raman Spectroscopy (CARS). Rotational-translational temperature in the afterglow is inferred from partially rotationally resolved structure of N2(v=0) band. The measurements have been done in nitrogen, dry air, and their mixtures with CO2. N2 vibrational excitation in the discharge occurs by electron impact, with subsequent vibration-vibration (V-V) energy transfer within N2 vibrational manifold, vibration-translation (V-T) relaxation, and near-resonance V-V' energy transfer from N2 to CO2 asymmetric stretch vibrational mode. The results show that rapid V-V' energy transfer to CO2, followed by intramolecular energy redistribution to symmetric stretch and bending modes of CO2 and their V-T relaxation, considerably accelerate the net rate of energy thermalization and temperature rise in the afterglow. The effect of accelerated N2 vibrational relaxation may explain localized thermal perturbations detected in filamentary, ns pulse, surface dielectric barrier discharges in quiescent room air, on the time scale of several hundred microsecond, which matches the estimated vibrational relaxation time of nitrogen by water vapor at these conditions. The present results are consistent with previous CARS measurements of N2 vibrational temperature distribution in the nonequilibrium supersonic shear layer, which demonstrated that CO2 injection results in its significant reduction, thereby strongly affecting the flow field. The present results show that significant amounts of vibrational energy can be stored in nonequilibrium nitrogen and air flows and released at a desired location, using local injection of rapid “relaxer” species such as CO2 or hydrocarbons and providing significant effect on the high-speed flow, at the conditions when water vapor concentration in the flow is low (e.g. in high-altitude flight).
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1993 with total page 1146 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 1988 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Measurements of the Resonant Vibrational Energy Transfer Between Mode nu 3 of CO2 and written by Raymond L. Taylor and published by . This book was released on 1968 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1966 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Science Technology Index written by and published by . This book was released on 1979 with total page 1734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonequilibrium Vibrational Kinetics written by M. Capitelli and published by Springer. This book was released on 1986 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1963-07 with total page 1156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plasma Catalysis written by Annemie Bogaerts and published by MDPI. This book was released on 2019-04-02 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma catalysis is gaining increasing interest for various gas conversion applications, such as CO2 conversion into value-added chemicals and fuels, N2 fixation for the synthesis of NH3 or NOx, methane conversion into higher hydrocarbons or oxygenates. It is also widely used for air pollution control (e.g., VOC remediation). Plasma catalysis allows thermodynamically difficult reactions to proceed at ambient pressure and temperature, due to activation of the gas molecules by energetic electrons created in the plasma. However, plasma is very reactive but not selective, and thus a catalyst is needed to improve the selectivity. In spite of the growing interest in plasma catalysis, the underlying mechanisms of the (possible) synergy between plasma and catalyst are not yet fully understood. Indeed, plasma catalysis is quite complicated, as the plasma will affect the catalyst and vice versa. Moreover, due to the reactive plasma environment, the most suitable catalysts will probably be different from thermal catalysts. More research is needed to better understand the plasma–catalyst interactions, in order to further improve the applications.
Download or read book Plasma Kinetics in Atmospheric Gases written by M. Capitelli and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasis is placed on the analysis of translational, rotational, vibrational and electronically excited state kinetics, coupled to the electron Boltzmann equation.
Download or read book Plasma Medicine written by Alexander Fridman and published by John Wiley & Sons. This book was released on 2012-12-19 with total page 629 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive text is suitable for researchers and graduate students of a ‘hot’ new topic in medical physics. Written by the world’s leading experts, this book aims to present recent developments in plasma medicine, both technological and scientific, reviewed in a fashion accessible to the highly interdisciplinary audience consisting of doctors, physicists, biologists, chemists and other scientists, university students and professors, engineers and medical practitioners. The book focuses on major topics and covers the physics required to develop novel plasma discharges relevant for medical applications, the medicine to apply the technology not only in-vitro but also in-vivo testing and the biology to understand complicated bio-chemical processes involved in plasma interaction with living tissues.
Download or read book Molecular Energy Transfer written by Raphael D. Levine and published by John Wiley & Sons. This book was released on 1976 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coherent Raman Spectroscopy written by Gerd Marowsky and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress made during the last few years in nonlinear optics and quantum electronics has significantly increased our understanding of the interactionbetween light and matter. Of great importance are third-order nonlinear Raman techniques such as CARS, RIKES, SRS, and DFWM. This book reflects the state of the art in coherent Raman spectroscopy. The contributions together provide an overview of the various Raman techniques that make available information about the fine structure of molecular energy levels, the collisional dynamics of atoms and molecules, and processes of internal energy disipation. Some of the contributions also report on the application of local, nonperturbing diagnosic methods forthe determination of parameters such as composition, temperature, density, velocity, and energy distribution between the internal degrees of freedom.
Download or read book Non Thermal Plasma Techniques for Pollution Control written by Bernie M. Penetrante and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acid rain, global warming, ozone depletion, and smog are preeminent environmental problems facing the world today. Non-thermal plasma techniques offer an innovative approach to the solution of some of these problems. There are many types of non-thermal plasma devices that have been developed for environmental applications. The potential of these devices for the destruction of pollutants or toxic molecules has already been demonstrated in many contexts, such as nitrogen oxides (NOX) and sulfur dioxide (SO2) in flue gases, heavy metals and volatile organic compounds (VOCs) in industrial effluents, and chemical agents such as nerve gases. This book contains a comprehensive account of the latest developments in non-thermal plasma devices and their applications to the disposal of a wide variety of gaseous pollutants.
Download or read book Fundamentals of Light Sources and Lasers written by Mark Csele and published by John Wiley & Sons. This book was released on 2011-09-23 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive introduction to the burgeoning field of photonics The field of photonics is finding increasing applications across a broad range of industries. While many other books provide an overview of the subject, Fundamentals of Light Sources and Lasers closes a clear gap in the current literature by concentrating on the principles of laser operation as well as providing coverage of important concepts necessary to fully understand the principles involved. The scope of the book includes everything a professional needs to get up to speed in the field, as well as all the material necessary to serve as an excellent introductory laser course for students. Ideal for self-study as well as structured coursework, the book offers thorough coverage of: * The nature of light and atomic emission * Basic quantum mechanics and laser processes * Cavity optics, fast-pulse production, and nonlinear optical phenomena * Laser technology, including visible gas lasers, UV gas lasers, infrared gas lasers, solid-state lasers, semiconductor lasers and tunable dye lasers Extensive real-world case studies are included to help readers appreciate the practical applications of the material covered. *An Instructor's Manual presenting detailed solutions to all the problems in the book is available from the Wiley editorial department.
Download or read book Microwave Discharges written by Carlos M. Ferreira and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a NATO ARW held in Vimeiro, Portugal, May 11-15, 1992
Download or read book Plasma Chemistry written by Alexander Fridman and published by Cambridge University Press. This book was released on 2008-05-05 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a fundamental introduction to all aspects of modern plasma chemistry, this book describes mechanisms and kinetics of chemical processes in plasma, plasma statistics, thermodynamics, fluid mechanics and electrodynamics, as well as all major electric discharges applied in plasma chemistry. Fridman considers most of the major applications of plasma chemistry, from electronics to thermal coatings, from treatment of polymers to fuel conversion and hydrogen production and from plasma metallurgy to plasma medicine. It is helpful to engineers, scientists and students interested in plasma physics, plasma chemistry, plasma engineering and combustion, as well as chemical physics, lasers, energy systems and environmental control. The book contains an extensive database on plasma kinetics and thermodynamics and numerical formulas for practical calculations related to specific plasma-chemical processes and applications. Problems and concept questions are provided, helpful in courses related to plasma, lasers, combustion, chemical kinetics, statistics and thermodynamics, and high-temperature and high-energy fluid mechanics.
