Raman Scattering Measurements in an Opposed Jet Flame

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ISBN 13 :
Total Pages : 204 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Raman Scattering Measurements in an Opposed Jet Flame by : Cheng-Yuan Pai

Download or read book Raman Scattering Measurements in an Opposed Jet Flame written by Cheng-Yuan Pai and published by . This book was released on 1992 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Multi-point Measurement of Temperature and Species Concentrations in Opposed Jet Flames by UV Raman Scattering

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ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (977 download)

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Book Synopsis Multi-point Measurement of Temperature and Species Concentrations in Opposed Jet Flames by UV Raman Scattering by : T. M. Brown

Download or read book Multi-point Measurement of Temperature and Species Concentrations in Opposed Jet Flames by UV Raman Scattering written by T. M. Brown and published by . This book was released on 1994 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Tubular Combustion

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Publisher : Momentum Press
ISBN 13 : 1606503057
Total Pages : 381 pages
Book Rating : 4.6/5 (65 download)

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Book Synopsis Tubular Combustion by : Satoru Ishizuka

Download or read book Tubular Combustion written by Satoru Ishizuka and published by Momentum Press. This book was released on 2013-11-04 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tubular combustors are cylindrical tubes where flame ignition and propagation occur in a spatially confined, highly controlled environment, in a nearly flat, elongated geometry. This allows for some unique advantages where extremely even heat dispersion is required over a large surface while still maintaining fuel efficiency. Tubular combustors also allow for easy flexibility in type of fuel source, allowing for quick changeover to meet various needs and changing fuel pricing. This new addition to the MP sustainable energy series will provide the most up-to-date research on tubular combustion--some of it only now coming out of private proprietary protection. Plentiful examples of current applications along with a good explanation of background theory will offer readers an invaluable guide on this promising energy technology. Highlights include: * An introduction to the theory of tubular flames * The "how to" of maintaining stability of tubular flames through continuous combustion * Examples of both small-scale and large-scale applications like steel making, chemical processing, flexible-fuel-source heaters, efficient boilers, and other similar uses

Laser Raman Scattering Measurements of Differential Molecular Diffusion in Turbulent Nonpremixed Jet Flames of H[sub 2]/CO[sub 2] Fuel

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (685 download)

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Book Synopsis Laser Raman Scattering Measurements of Differential Molecular Diffusion in Turbulent Nonpremixed Jet Flames of H[sub 2]/CO[sub 2] Fuel by :

Download or read book Laser Raman Scattering Measurements of Differential Molecular Diffusion in Turbulent Nonpremixed Jet Flames of H[sub 2]/CO[sub 2] Fuel written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper explores effects of differential diffusion in nonpremixed turbulent jet flames. Pulsed Raman scattering spectroscopy is used to measure temperature and species concentrations in chemically reacting jets of H[sub 2]/CO[sub 2] into air, over a range of jet Reynolds numbers from 1,000 to 30,000 based on cold jet fluid properties. Results show significant effects of differential diffusion at all jet Reynolds numbers considered. Differential diffusion between H[sub 2] and C0[sub 2] produces differences between the hydrogen element mixture fraction ([xi][sub H]) and the carbon element mixture fraction ([xi][sub c]). The greatest effects occur on the rich side of stoichiometric, where [xi][sub H] is observed to be smaller than [xi][sub C] at all Reynolds numbers. Differential diffusion between H[sub 2] and H[sub 2]O creates a net flux of hydrogen element toward the stoichiometric contour and causes a local maximum in [xi]H that occurs near the stoichiometric condition. A differential diffusion variable [sup Z]H is defined as the difference between [xi][sub H] and [xi][sub C]. The variance Of [sup Z]H conditional on [xi][sub C] also shows that differential diffusion effects are greatest on the rich side of the flame. Conditional variances of [sup Z]H are largest at intermediate Reynolds numbers.

Flow and Combustion in Advanced Gas Turbine Combustors

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Publisher : Springer Science & Business Media
ISBN 13 : 9400753209
Total Pages : 495 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Flow and Combustion in Advanced Gas Turbine Combustors by : Johannes Janicka

Download or read book Flow and Combustion in Advanced Gas Turbine Combustors written by Johannes Janicka and published by Springer Science & Business Media. This book was released on 2012-10-29 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: With regard to both the environmental sustainability and operating efficiency demands, modern combustion research has to face two main objectives, the optimization of combustion efficiency and the reduction of pollutants. This book reports on the combustion research activities carried out within the Collaborative Research Center (SFB) 568 “Flow and Combustion in Future Gas Turbine Combustion Chambers” funded by the German Research Foundation (DFG). This aimed at designing a completely integrated modeling and numerical simulation of the occurring very complex, coupled and interacting physico-chemical processes, such as turbulent heat and mass transport, single or multi-phase flows phenomena, chemical reactions/combustion and radiation, able to support the development of advanced gas turbine chamber concepts

Rotational and Vibrational Raman Spectroscopy for Thermochemistry Measurements in Supersonic Flames

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (87 download)

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Book Synopsis Rotational and Vibrational Raman Spectroscopy for Thermochemistry Measurements in Supersonic Flames by : Alexander C Bayeh

Download or read book Rotational and Vibrational Raman Spectroscopy for Thermochemistry Measurements in Supersonic Flames written by Alexander C Bayeh and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High speed chemically reacting flows are important in a variety of aerospace applications, namely ramjets, scramjets, afterburners, and rocket exhausts. To study flame extinction under similar high Mach number conditions, we need access to thermochemistry measurements in supersonic environments. In the current work a two-stage miniaturized combustor has been designed that can produce open supersonic methane-air flames amenable to laser diagnostics. The first stage is a vitiation burner, and was inspired by well-known principles of jet combustors. We explored the salient parameters of operation experimentally, and verified flame holding computationally using a well-stirred reactor model. The second stage of the burner generates an external supersonic flame, operating in premixed and partially premixed modes. The very high Mach numbers present in the supersonic flames should provide a useful test bed for the examination of flame suppression and extinction using laser diagnostics. We also present the development of new line imaging diagnostics for thermochemistry measurements in high speed flows. A novel combination of vibrational and rotational Raman scattering is used to measure major species densities (O2, N2, CH4, H2O,CO2, CO, & H2) and temperature. Temperature is determined by the rotational Raman technique by comparing measured rotational spectra to simulated spectra based on the measured chemical composition. Pressure is calculated from density and temperature measurements through the ideal gas law. The independent assessment of density and temperature allows for measurements in environments where the pressure is not known a priori. In the present study we applied the diagnostics to laboratory scale supersonic air and vitiation jets, and examine the feasibility of such measurements in reacting supersonic flames. Results of full thermochemistry were obtained for the air and vitiation jets that reveal the expected structure of an under-expanded jet. Centerline traces of density, temperature, and pressure of the air jet agree well with computations, while measurements of chemical composition for the vitiation flow also agree well with predicted equilibrium values. Finally, we apply the new diagnostics to the exhaust of the developed burner, and show the first ever results for density, temperature, and pressure, as well as chemical composition in a supersonic flame. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151043

OneD raman-rayleigh-scattering and CO-LIF measurements in laminar and turbulent jet flames of dimethyl ether using a hybrid data reduction strategy

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ISBN 13 :
Total Pages : 125 pages
Book Rating : 4.:/5 (794 download)

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Book Synopsis OneD raman-rayleigh-scattering and CO-LIF measurements in laminar and turbulent jet flames of dimethyl ether using a hybrid data reduction strategy by : Frederik Fuest

Download or read book OneD raman-rayleigh-scattering and CO-LIF measurements in laminar and turbulent jet flames of dimethyl ether using a hybrid data reduction strategy written by Frederik Fuest and published by . This book was released on 2011 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Spontaneous Raman Scattering

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Spontaneous Raman Scattering by : R. J. Locke

Download or read book Spontaneous Raman Scattering written by R. J. Locke and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Laser Raman Scattering Measurements of Differential Diffusion in Non-reacting and Reacting Laminar and Turbulent Jet Flows

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ISBN 13 :
Total Pages : pages
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Book Synopsis Laser Raman Scattering Measurements of Differential Diffusion in Non-reacting and Reacting Laminar and Turbulent Jet Flows by : L. L. Smith

Download or read book Laser Raman Scattering Measurements of Differential Diffusion in Non-reacting and Reacting Laminar and Turbulent Jet Flows written by L. L. Smith and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Rayleigh and Raman Scattering for Density in a Swirling Flow Combustor

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ISBN 13 :
Total Pages : 548 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Rayleigh and Raman Scattering for Density in a Swirling Flow Combustor by : Rangasayi Narayan Halthore

Download or read book Rayleigh and Raman Scattering for Density in a Swirling Flow Combustor written by Rangasayi Narayan Halthore and published by . This book was released on 1984 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Raman Scattering Measurements in the Initial Region of Sub- and Supercritical Jets

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Raman Scattering Measurements in the Initial Region of Sub- and Supercritical Jets by : B. Chehroudi

Download or read book Raman Scattering Measurements in the Initial Region of Sub- and Supercritical Jets written by B. Chehroudi and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Opposed Jet Turbulent Diffusion Flames

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ISBN 13 :
Total Pages : 74 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Opposed Jet Turbulent Diffusion Flames by : Lawrence Talbot

Download or read book Opposed Jet Turbulent Diffusion Flames written by Lawrence Talbot and published by . This book was released on 1990 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Application of Spontaneous Raman Scattering for Measurements of Thermal Non-equilibrium in High-speed Mixing and Combustion

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ISBN 13 :
Total Pages : 418 pages
Book Rating : 4.:/5 (12 download)

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Book Synopsis Application of Spontaneous Raman Scattering for Measurements of Thermal Non-equilibrium in High-speed Mixing and Combustion by : Heath Heinrich Reising

Download or read book Application of Spontaneous Raman Scattering for Measurements of Thermal Non-equilibrium in High-speed Mixing and Combustion written by Heath Heinrich Reising and published by . This book was released on 2017 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixing-induced vibrational non-equilibrium is studied in the turbulent shear layer between a high-speed jet and a surrounding hot-air coflow. The vibrational and rotational temperatures of N2 and O2 are determined by fitting measured spontaneous Raman scattering spectra to a model that allows for different equilibrium distributions of the vibrational and rotational states. The mixing of the jet fluid with the coflow gases occurs over microsecond time scales, which is sufficiently fast to induce vibrational non-equilibrium in the mixture of hot and cold gases. I measured the non-equilibrium on the hot side of the shear layer, but not on the cold side where the vibrational population in the first hot band is negligible. The effect of fluctuating temperatures on the time-averaged Raman measurement was quantified using single-shot Rayleigh thermometry. The Raman scattering results were found to be insensitive to fluctuations except where the flame is present intermittently. It was also found that the measured non-equilibrium increases in the shear layer when N2 is removed from the jet fluid, indicating that the measurements average two competing processes that occur simultaneously at a molecular scale: vibrationally hot N2 cooled by the fast jet fluid and vibrationally cold jet fluid heated by a hot coflow. An interesting inference is that the averaging effect is always present, regardless of the measurement resolution. No measurable vibrational non-equilibrium is found in the O2 molecules in the same non-reacting regions. This difference between species temperatures violates the two-temperature assumption often used in the modeling of high-temperature non-equilibrium flow. A new technique was developed to obtain spontaneous Raman scattering temperature measurements from a single laser pulse. This technique required the construction of a multiple-pass cell to obtain adequate scattered signal. Additionally, the pulse was stretched temporally with a system of partial reflectors and time-flight-delay ring cavities in order to reduce the peak power of the 1 J laser pulses. These measurements were found to be in agreement with the previous time-average results and allowed for measurement to be made near the fluctuating base of a lifted flame – a region where time-averaged measurements do not give meaningful results.

Demonstration of Triple Pump Coherent Anti-Stokes Raman Scattering in a Jet Diffusion Flame

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ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.:/5 (526 download)

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Book Synopsis Demonstration of Triple Pump Coherent Anti-Stokes Raman Scattering in a Jet Diffusion Flame by : Viswanathan Velur Natarajan

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:

SPONTANEOUS RAMAN SCATTERING: FROM ATMOSPHERIC CH4/AIR DIFFUSION FLAME TO 55 BAR JET-A-FUELED, AVIATION... NASA/TM--2002-211869... NATIONAL

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ISBN 13 :
Total Pages : pages
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Book Synopsis SPONTANEOUS RAMAN SCATTERING: FROM ATMOSPHERIC CH4/AIR DIFFUSION FLAME TO 55 BAR JET-A-FUELED, AVIATION... NASA/TM--2002-211869... NATIONAL by :

Download or read book SPONTANEOUS RAMAN SCATTERING: FROM ATMOSPHERIC CH4/AIR DIFFUSION FLAME TO 55 BAR JET-A-FUELED, AVIATION... NASA/TM--2002-211869... NATIONAL written by and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Joint Meeting of the U.S. Sections of the Combustion Institute, Western States, Central States, Eastern States

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ISBN 13 :
Total Pages : 954 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Joint Meeting of the U.S. Sections of the Combustion Institute, Western States, Central States, Eastern States by :

Download or read book Joint Meeting of the U.S. Sections of the Combustion Institute, Western States, Central States, Eastern States written by and published by . This book was released on 1999 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Springer Handbook of Experimental Fluid Mechanics

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Publisher : Springer Science & Business Media
ISBN 13 : 3540251413
Total Pages : 1570 pages
Book Rating : 4.5/5 (42 download)

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Book Synopsis Springer Handbook of Experimental Fluid Mechanics by : Cameron Tropea

Download or read book Springer Handbook of Experimental Fluid Mechanics written by Cameron Tropea and published by Springer Science & Business Media. This book was released on 2007-10-09 with total page 1570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accompanying DVD-ROM contains ... "all chapters of the Springer Handbook."--Page 3 of cover.