Download or read book Flame Investigation by Coherent Anti stokes Raman Scattering written by Francois Moya and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cars coherent Anti Stokes Raman Spectroscopy Investigations in Sooting and Turbulent Flames written by Alan C.. Eckbreth and published by . This book was released on 1979 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coherent anti-Stoke Raman spectroscopy (CARS) investigations in sooting, laminar and turbulent, propane-fueled diffusion flames are reported. For a 5320 A pump wavelength, using a frequency-doubled neodymium laser, interferences can occur at very high soot densities. For N2 CARS, there are both incoherent and coherent components to the interference. The incoherent interference arises primarily from anti-Stokes fluorescence from C2 excited by Stokes laser absorption. The C2 is created by the laser vaporization of soot particulates, shown to occur even on a nanosecond time scale. The coherent interference arises most probably from electronically-resonantly enhanced wave mixing in the C2. Fortunately, neither interference is very large. By proper experimental design, interference-free CARS spectra from flame N2 can be obtained even at high soot densities. CARS signatures from N2 have been employed to map the temperature field with high spatial precision throughout a small, luminous, highly sooting, laminar propane diffusion flame. Single pulse (approx, 10 nanosecond) CARS thermometry has been demonstrated in various regions of a highly swireld, turbuelnt propane diffusion flame. Based upon these investigations, CARS continues to appear very promising for diagnostic applications to practical combustion sources. (Author).

Download or read book Flame Studies with the Coherent Anti stokes Raman Spectroscopy Technique written by L. P. Goss and published by . This book was released on 1980 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: AIAA 15th Thermophysics Conference, Jul 14-16, 1980, Snowmass, CO.

Download or read book Laser Spectroscopy of Propellant Like Flames written by Richard A. Beyer and published by . This book was released on 1983 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The laser-based techniques Coherent Anti-Stokes Raman Spectroscopy (CARS) and Spontaneous Raman Scattering have been applied to studies of the detailed chemistry of premixed flames. The status of this research effort and its future goals in gun propulsion research are discussed. (Author).

Download or read book Application of Coherent Anti Stokes Raman Scattering to Combustion Media written by Larry P. Goss and published by . This book was released on 1981 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: A laboratory-based system utilizing the Nd:YAG laser has been developed to investigate the Coherent Anti-Stokes Raman Scattering (CARS) of molecular gases in combustion. Single-shot and simultaneous experimental measurements of species concentration and temperature of combustion media are reported and compared with other optical techniques and theoretical predictions. The adverse effects of beam propagation through turbulence are investigated and discussed. A transportable hardened CARS system, constructed to operate in adverse environments, has been used to conduct a series of investigations in a practical combustion tunnel. Temperature and number-density measurements made as a function of fuel-air flow, position in the combustion tunnel, and fuel variation--including both gaseous and liquid fuels--are reported. (Author).

Download or read book Coherent Raman Spectroscopy Applications And New Developments Proceedings Of The Xi European Cars Workshop written by F Castellucci and published by World Scientific. This book was released on 1993-02-09 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: The meeting was a forum on the 'state of the art' of the fundamental aspects and the applications of Coherent Antistokes Raman Scattering (CARS) and related nonlinear optic techniques.This volume contains the works of outstanding scientists from the most distinguished research centers of universities, public and private institutions in Europe and other countries, who work on the theory and application of nonlinear laser spectroscopic techniques to the study of gas combustion kinetics, noninterfering flame temperature measurements, high temperature reactors, plasmas and the exciton and vibrational dynamics in condensed phases.

Download or read book Demonstration of Triple Pump Coherent Anti Stokes Raman Scattering in a Jet Diffusion Flame written by Viswanathan Velur Natarajan and published by . This book was released on 2002 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Turbulent Nonpremixed Jet Flames of CO N2 Using Coherent Anti stokes Raman Spectroscopy written by Kevin W. Boyack and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Coherent Anti Stokes Raman Scattering Measurements in Carbon Ablation Experiments written by R. C. Benson and published by . This book was released on 1983 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigations were made of the feasibility of using Raman techniques to measure the gaseous products of carbon oxidation. A coherent anti-Stokes Raman scattering system was assembled to measure carbon monoxide. Approximately 200 micrometer from the graphite surface, carbon monoxide concentrations in the range of 5 to 10% (40 to 80 Torr) were measured during the ablation of ATJ graphite in air at 2000 K. Recommendations were made for improvements to the experimental system. (Author).

Download or read book Raman Spectroscopy of Gases and Liquids written by A. Weber and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Raman effect is a most useful tool for the study of molecular vibrations and molecular structure. Information about the structure and symmetry of molecules, as well as about their vibrational energies can be obtained to a reasonable degree of satisfaction from their infrared and Raman vibrational spectra. The body of knowl edqe of the vibrational infrared and Raman spectra of molecules is immense and is now so well organized and understood that it is found to be represented in any stan dard upper level undergraduate curriculum in chemistry. The rotational energies of a molecule and quantitative details about its structure can only be obtained through the techniques of microwave, and high-resolution infrared and Raman spectroscopy of low pressure gases and vapors. The results of such investigations are of interest . not only to the academic scientists, but also to scientists and engineers who are active in applied fields of chemistry and physics, as well as the atmospheric sciences. This book deals with basic investigations of the Raman scattering of light by gases, with some attention also being given to liquid substances. After a brief in troductory chapter that delineates the historical development of Raman spectroscopy of gases, high-resolution rotation-vibrational and pure rotational Raman spectros copy is described in Chapters 2 and 3. The all-important intensity parameter, the Raman scattering cross section, is treated in Chapter 4, while the broadening of Raman lines due to the effects of intermolecular forces is taken up in Chapter 5.

Download or read book Experimental and Theoretical Investigations of Coherent Anti Stokes Raman Scattering as a Nonintrusive Diagnostic for Gas Phase Systems written by Joel Paul Kuehner and published by . This book was released on 2003 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coherent Anti Stokes Raman Spectroscopy CARS Measurements in a Laminar Flame Coal Combustor written by Robert D. Hancock and published by . This book was released on 1989 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Accurate Measurements of Combustion Species Concentrations Using CARS Coherent Antistokes Raman Scattering written by R. L. Farrow and published by . This book was released on 1986 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results of research at the Combustion Research Facility, Sandia National Lab., on improving the capabilities of coherent anti-Stokes Raman spectroscopy (CARS) for species concentration measurements in combustion gases. Scanning CARS experiments based on single- and multi-mode Nd:YAG lasers, and on pulse-amplified and conventional pulsed dye lasers have been used to evaluate an in situ normalization technique, to measure Raman linewidths in flames, and to determine nonresonant electronic susceptibilities. We discuss experimental and theoretical considerations affecting concentration measurement accuracy.

Download or read book Single Beam Coherent Anti Stokes Raman Scattering Spectroscopy of N2 Using a Shaped 7 Fs Laser Pulse written by and published by . This book was released on 2009 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The feasibility is explored by single-beam coherent anti-Stokes Raman scattering CARS spectroscopy of gas-phase diatomic molecules related to combusting flows, with implications for gas-phase thermometry. We demonstrate CARS of gas-phase N2 using a shaped 7 fs laser pulse, investigate the dependence of the CARS signal on the total pressure of the probed environment, both in pure N2 and in mixtures with Ar, discuss the observed signal-to-noise ratio, and suggest improvements to be considered for reliable single-shot measurements at flame temperatures.

Download or read book Advanced Diagnostics in Combustion Science written by Zhen-Yu Tian and published by Springer Nature. This book was released on 2023-07-12 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook, supported by the Textbook Publishing Center of University of Chinese Academy of Sciences, provides a fundamental introduction to advanced diagnostics techniques for graduate students majoring in combustion science, chemistry, and chemical engineering-related subjects. The textbook provides an overview with respect to the spectroscopic methods in advanced diagnostics techniques such as gas chromatography/mass spectrometry, thermochemical analysis, Raman scattering, and nuclear magnetic resonance. It then describes the comprehensive basic theory, equipment structure, and testing methods of diagnostic techniques and summarizes the analysis methods commonly used in combustion chemical reaction processes. This can provide graduate students with important guidance and comprehensive understanding of diagnostics techniques before performing physics and chemistry experiments. In addition, it provides an introduction into using common mathematical and graphics packages for students to acquire and practice the tools to comply with international standards. The textbook is concise and illustrative and includes hot issues and current progress of diagnostics. In addition, exercises and questions are included at the end of each chapter for students to practice and gain hands-on experience. Given its scope, the textbook is of great benefit to graduate students in combustion chemistry and engineering and other related areas such as environmental science, optical engineering, and thermal science and is also beneficial for researchers with interdisciplinary backgrounds.

Download or read book Characterization of High Temperature Vapors and Gases written by John W. Hastie and published by . This book was released on 1979 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt: