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Nh And Oh Concentration Profiles In A Stoichiometric Ch4 N2o Flame By Laser Excited Fluorescence And Absorption Techniques
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Book Synopsis NH and OH Concentration Profiles in a Stoichiometric CH4/N2O Flame by Laser Excited Fluorescence and Absorption Techniques by : William R. Anderson
Download or read book NH and OH Concentration Profiles in a Stoichiometric CH4/N2O Flame by Laser Excited Fluorescence and Absorption Techniques written by William R. Anderson and published by . This book was released on 1982 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concentration profiles of NH and OH were measured in an atmospheric pressure premixed laminar Ch4/N2O flame over a porous plug flat flame burner. Relative profiles were obtained by laser excited fluorescence for both compounds and normalized by laser absorption at a single point for NH. The OH concentration was high enough to allow absorption measurements at several points for comparison with fluorescence results. The steeply rising portions of the profiles occur at about the same height above the burner but the NH is confined to the primary reaction zone while the OH decay extends into the burnt gases. The apparent OH decay was found, using a simple analysis, to be consistent with second order kinetics as observed by previous workers on other flames. However, it should be noted that diffusion of OH is at least partially responsible for the apparent shape of the profile resulting in the second order decay kinetics found using the simple analysis. The decay rate is smaller than that observed by previous workers for CH4/air flames. Qualitative reasons for the different decay rates found in the studies are discussed in detail. A strong dependence of OH decay rate on final flame temperature, and hence the cooling rate peculiar to the burner concentration in CH4/air, CH4/NO, and H2/N2O flames were made in order to elucidate the flame chemistry. (Author).
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 1983 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temperature Profile of a Stoichiometric CH4/N2O Flame from Laser Excited Fluorescence Measurements on OH. by : William R. Anderson
Download or read book Temperature Profile of a Stoichiometric CH4/N2O Flame from Laser Excited Fluorescence Measurements on OH. written by William R. Anderson and published by . This book was released on 1982 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The temperature profile of a stoichiometric CH4/N2O flame over a porous plug, atmospheric-pressure burner has been measured using laser excited fluorescence of the OH radical. The technique of rotationally resolved fluorescence excitation scans was extended to the (1,1) vibrational band of the A doublet sigma plus - X doublet pi system to avoid problems of laser beam depletion and self-absorption encountered by this group and previous workers using the (O, O) band. Absorption spectra were obtained in addition to fluorescence spectra. A least squares curve-fitting technique which accounts for the various types of line broadening was developed and applied to two absorption lines in the (O, O) band. The resulting temperature profile is compared to that from fluorescence data reduced using Boltzmann plots. The more complicated curve-fitting approach was later applied to five lines in the spectrum using several combinations of fluorescence and absorption data. Results of all the aforementioned methods were compared to those from OH band reversal and N2 vibrational Raman measurements at the same point in the post flame gases. Excellent agreement was achieved. The results are discussed with emphasis on both the fluorescence diagnostics and the characteristics of the CH4/N2O flame on the porous-plug burner.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Spectroscopy and its Applications by : Richard W. Solarz
Download or read book Laser Spectroscopy and its Applications written by Richard W. Solarz and published by Routledge. This book was released on 2017-11-22 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together scattered literature from a range of sources, Laser Spectroscopy and ItsApplications clearly elucidates the tools and concepts of this dynamic area, and providesextensive bibliographies for further study.Distinguished experts in their respective fields discuss resonance photoionization, laser absorption,laser-induced breakdown, photodissociation, Raman scattering, remote sensing,and laser-induced fluorescence. The book also incorporates an overview of the semiclassicaltheory of atomic and molecular spectra.Combining background at an intermediate level with an in-depth discussion of specifictechniques, Laser Spectroscopy and Its Applications is essential reading for laser and opticalscientists and engineers; analytical chemists; health physicists; researchers in optical,chemical, pharmaceutical, and metallurgical industries. It will also prove useful for upperlevelundergraduate and graduate students of laser spectroscopy and its applications, andin-house seminars and short courses offered by firms and professional societies.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1982 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1983 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1986 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temperature and Concentration Profiles in Hydrogen-Nitrous Oxide Flames by : John A. Vanderhoff
Download or read book Temperature and Concentration Profiles in Hydrogen-Nitrous Oxide Flames written by John A. Vanderhoff and published by . This book was released on 1986 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spontaneous Raman spectroscopy has been used to measure temperature and NO, O, and N concentration profiles in lean to stoichiometric premixed laminar hydrogen-nitrous oxide flames. Relative concentration profiles for OH were also obtained for these flames by use of laser induced fluorescence. The present NO concentration results for the Stoichiometric flame agree with previous NO measurements obtained by a different optical technique. Profiling these species for various equivalence ratios provides a further test for flame modelers.
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Technology Index written by and published by . This book was released on 1984 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Abstracts written by and published by . This book was released on 1996 with total page 1366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book JANNAF Combustion Meeting written by and published by . This book was released on 1988-10 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 32nd Aerospace Sciences Meeting & Exhibit: 94-0220 - 94-0254 by :
Download or read book 32nd Aerospace Sciences Meeting & Exhibit: 94-0220 - 94-0254 written by and published by . This book was released on 1994 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Line Reversal Temperature of OH in CH4/N2O Flames by : William R. Anderson
Download or read book Measurement of the Line Reversal Temperature of OH in CH4/N2O Flames written by William R. Anderson and published by . This book was released on 1981 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reversal technique is universally accepted by the combustion community as an accurate method for flame-temperature measurements. This technique has generally involved the use of Na seeded in flames. However, for many burner types seeding is difficult. This work describes band-reversal measurements using OH, which occurs naturally in all flames containing oxygen and hydrogen. The theory is discussed as well as use of the technique in the burnt gas region of CH4/N2O flames. The experimental results are compared with laser-excited fluorescence temperature measurements also performed in this laboratory. Excellent agreement was achieved.
Book Synopsis Quantitative Measurement of Hydroxyl Radical (OH) Concentration in Premixed Flat Flame by Combining Laser-induced Fluorescence and Direct Absorption Spectroscopy*Project Supported by the National Natural Science Foundation of China (Grant No. 11272338), the Science and Technology on Scramjet Key Laboratory Funding, China (Grant No. STSKFKT 2013004), and the China Scholarship Council by :
Download or read book Quantitative Measurement of Hydroxyl Radical (OH) Concentration in Premixed Flat Flame by Combining Laser-induced Fluorescence and Direct Absorption Spectroscopy*Project Supported by the National Natural Science Foundation of China (Grant No. 11272338), the Science and Technology on Scramjet Key Laboratory Funding, China (Grant No. STSKFKT 2013004), and the China Scholarship Council written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: An accurate and reasonable technique combining direct absorption spectroscopy and laser-induced fluorescence (LIF) methods is developed to quantitatively measure the concentrations of hydroxyl in CH4 /air flat laminar flame. In our approach, particular attention is paid to the linear laser-induced fluorescence and absorption processes, and experimental details as well. Through measuring the temperature, LIF signal distribution and integrated absorption, spatially absolute OH concentrations profiles are successfully resolved. These experimental results are then compared with the numerical simulation. It is proved that the good quality of the results implies that this method is suitable for calibrating the OH-PLIF measurement in a practical combustor.
