Download or read book Laser Induced Hydroxyl Radical Fluoresence at Atmospheric Pressure written by Cornelius Yuk-kwan Chan and published by . This book was released on 1982 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Induced Fluorescence of Hydroxyl OH Radical in Cold Atmospheric Discharges written by Jan Voráč and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of laser-induced fluorescence (LIF) to measurement of absolute concentration of hydroxyl radicals in cold atmospheric discharges is described. Though only the case of OH is presented, the method can be directly applied to other molecules as well. Starting from the rate equations for the LIF process, the main formulas for two- and multi-level excitation scheme are derived. It is also shown how to use partially saturated LIF in practice, enhancing the signal-to-noise ratio. Practical tips for automating the data evaluation are given, allowing processing large data sets, particularly suitable for planar measurements. Gas temperature estimation from fluorescence on different rotational absorption lines is shown as an attractive method for obtaining temperature maps with high spatial resolution. The important aspects of calibration are discussed, particularly the overlap of the laser line with the selected absorption line and the measurement of the Rayleigh scattering for sensitivity calibration, together with the common sources of errors. The application of OH(A, v' = 0 ← X, v" = 0) excitation scheme to the effluent of atmospheric pressure plasma jet ignited in argon and of OH(A, v' = 1 ← X, v" = 0) to the plasma of coplanar surface barrier discharge in air and in water vapor is shown.
Download or read book Comments on Laser excited fluorescence of the hydroxyl radical written by and published by . This book was released on 1983 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reactions of Hydroxyl Radicals with Oxygenated Hydrocarbons in the Gas Phase A Laser Photolysis Laser Induced Fluorescence Study written by Cornelie Bänsch and published by Logos Verlag Berlin GmbH. This book was released on 2017 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydroxyl radicals (OH) play a key role in ignition processes and in the atmosphere. Thus, the detailed knowledge of the kinetics of OH reactions is crucial in combustion and atmospheric research. In this work, an experimental approach for time-resolved studies of OH radical reactions at high pressures with pulsed laser photolysis/laser-induced fluorescence was revised and the reactions of dimethyl ether, diethyl ether, and dimethoxymethane with OH radicals were investigated in detail. The results reveal a deeper insight into the reaction processes of ether compounds with OH in general, contributing to a better understanding of the combustion of different biofuels and fuel additives.
Download or read book Laser induced Fluorescence of the Hydroxyl Radical written by Zhongbin Yin and published by . This book was released on 1993 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Induced Fluorescence LIF Spectroscopic Measurement of Hydroxyl OH Radical Concentration Near Surfaces with Varying Chemical and Thermal Activity in Low Pressure Stoichiometric Hydrogen oxygen Flames written by Shaurya Prakash and published by . This book was released on 2003 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Collisional and Radiative Processes of the Hydroxyl Radical written by Kristen Lisa Steffens and published by . This book was released on 1994 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LIF Diagnostics of Hydroxyl Radical in a Methanol Containing Atmospheric pressure Plasma Jet Project Supported by the National Natural Science Foundation of China Grant Nos 11465013 and 11375041 the Natural Science Foundation of Jiangxi Province China Grant Nos 20151BAB212012 and 20161BAB201013 and the International Science and Technology Cooperation Program of China Grant No 2015DFA61800 written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: In this paper, a pulsed-dc CH3 OH/Ar plasma jet generated at atmospheric pressure is studied by laser-induced fluorescence (LIF) and optical emission spectroscopy (OES). A gas–liquid bubbler system is proposed to introduce the methanol vapor into the argon gas, and the CH3 OH/Ar volume ratio is kept constant at about 0.1%. Discharge occurs in a 6-mm needle-to-ring gap in an atmospheric-pressure CH3 OH/Ar mixture. The space-resolved distributions of OH LIF inside and outside the nozzle exhibit distinctly different behaviors. And, different production mechanisms of OH radicals in the needle-to-ring discharge gap and afterglow of plasma jet are discussed. Besides, the optical emission lines of carbonaceous species, such as CH, CN, and C2 radicals, are identified in the CH3 OH/Ar plasma jet. Finally, the influences of operating parameters (applied voltage magnitude, pulse frequency, pulsewidth) on the OH radical density are also presented and analyzed.
Download or read book Application of the Planar Laser Induced Fluorescence Imaging Technique of the Hydroxyl Radical in the Qualitative Investigation of Bunsen Burner Flames at Atmospheric Conditions written by Spyridon Simis and published by . This book was released on 2011 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of Laser Induced Fluorescence in an Atmospheric Pressure Boron Seeded Flame written by Greg R. Schneider and published by . This book was released on 1987 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this research was to demonstrate the feasibility of using laser-induced fluorescence (LIF) of boron oxide radicals in atmospheric-pressure flames. Such a demonstration would provide a useful tool with which to probe the detailed combustion chemistry of boron fuels. The radical species sought were BO2 and BO, both having spectra in the visible region of the spectrum. These two species are believed to play critical roles in the boron combustion process. A CH4/air/O2 flame was seeded with BC13 producing the green emission characteristic of boron flames. Unfortunately, it also created significant quantities of aerosols of solid boric acid from the reaction of the BC13 with the water vapor in the building air used in the flame. The burner was 1 cm in diameter and composed of approximately 60 capillary tubes. The burner could be remotely translated in two directions permitting investigation of different regions of the flame.
Download or read book Development of a Two photon laser Induced Fluorescence Sensor for the Detection of Atmospheric OH Radicals written by John David Bradshaw and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonequilibrium Atmospheric Pressure Plasma Jets written by XinPei Lu and published by CRC Press. This book was released on 2019-04-23 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonequilibrium atmospheric pressure plasma jets (N-APPJs) generate plasma in open space rather than in a confined chamber and can be utilized for applications in medicine. This book provides a complete introduction to this fast-emerging field, from the fundamental physics, to experimental approaches, to plasma and reactive species diagnostics. It provides an overview of the development of a wide range of plasma jet devices and their fundamental mechanisms. The book concludes with a discussion of the exciting application of plasmas for cancer treatment. The book provides details on experimental methods including expert tips and caveats. covers novel devices driven by various power sources and the impact of operating conditions on concentrations and fluxes of the reactive species. discusses the latest advances including theory, modeling, and simulation approaches. gives an introduction, overview and details on state of the art diagnostics of small scale high gradient atmospheric pressure plasmas. covers the use of N-APPJs for cancer applications, including discussion of destruction of cancer cells, mechanisms of action, and selectivity studies. XinPei Lu is a Chair Professor in the School of Electrical and Electronic Engineering at Huazhong University of Science and Technology. Stephan Reuter is currently Visiting Professor at Université Paris-Saclay. In a recent Alexander von Humboldt research fellowship at Princeton University, he performed ultrafast laser spectroscopy on cold plasmas. Mounir Laroussi is Professor of Electrical and Computer Engineering and director of the Plasma Engineering and Medicine Institute at Old Dominion University. He is a Fellow of IEEE and recipient of an IEEE Merit Award. DaWei Liu is Professor in the School of Electrical and Electronic Engineering at Huazhong University of Science and Technology.
Download or read book Development of a Two Photon laser Induced Fluorescence Technique for the Detection of Atmospheric OH Radicals written by John Bradshaw and published by . This book was released on 1990 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Planar Laser induced Fluorescence Measurements of the Hydroxyl Radical Concentration in an Acoustically Excited Dump Combustor written by Christopher P. Cadou and published by . This book was released on 1991 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Induced Fluorescence Spectroscopy of the Hydroxyl and Methoxy Radicals written by Abdullahi H. Nur and published by . This book was released on 1991 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrashort Two photon absorption Laser induced Fluorescence in Nanosecond duration Repetitively Pulsed Discharges written by Jacob Brian Schmidt and published by . This book was released on 2015 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finally, the fs-TALIF diagnostic is used in an atmospheric-pressure combustion environment, where plasma-assisted combustion (PAC) is used to augment flame characteristics. Fs-TALIF measurements of atomic hydrogen and oxygen are compared with hydroxyl radical number densities obtained with ns laser-induced fluorescence (LIF) measurements, to understand OH production mechanisms in the discharge occurring in the hot, downstream products of a premixed hydrocarbon/air flame. The fs-TALIF diagnostic provides fluorescence measurements more accurately from the PAC-produced atomic species, due to simultaneous measurement of quenching rates and reduced photolytic production in the hydrocarbon flames.
Download or read book Refinement of a Laser Photolysis laser induced Fluorescence Hydroxyl Radical Kinetics System written by James Henry Kasner and published by . This book was released on 1990 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
