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3 edition of Laser Raman diagnostics in subsonic and supersonic turbulent jet diffusion flames found in the catalog.

Laser Raman diagnostics in subsonic and supersonic turbulent jet diffusion flames

Laser Raman diagnostics in subsonic and supersonic turbulent jet diffusion flames

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Published by National Aeronautics and Space Administration, Langley Research Center, National Technical Information Service in Hampton, Va, [Springfield, Va .
Written in English

    Subjects:
  • Raman spectroscopy.

  • Edition Notes

    StatementT.S. Cheng, J.A. Wehrmeyer, and P.W. Pitz.
    SeriesNASA contractor report -- 189544., NASA contractor report -- NASA CR-189544.
    ContributionsWehrmeyer, J. A., Pitz, Robert W., Langley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15372753M

    two-dimensional temperature imaging in turbulent non-premixed jet flames using planar Rayleigh scattering in conjunction with a new, high-repetition-rate, high-energy pulse-burst laser system (HEPBLS). The HEPBLS, which can output ultra high pulse energies at 10 to 50 kHz (e.g., ~1 Joule/pulse at nm at 10 kHz) and long. Journal Publications. Submitted. Schmidt, B.E, Sutton, J.A., "Evaluation of Gas- and Particle-Phase Separation Methods for Velocity Measurements in Turbulent Multiphase Flows", submitted, Experiments in .

      This paper experimentally investigates the interaction between a plasma synthetic jet (PSJ) and a subsonic turbulent boundary layer (TBL) using a hotwire anemometer and phase-locked particle imaging velocimetry. The PSJ is interacting with a fully developed turbulent boundary layer developing on the flat wall of a square wind tunnel section of m by: derexpanded supersonic jet at temperatures as low as K and pressures below 2 Torr. In this Letter we report the first known high-resolu-tion cw coherent anti-Stokes Raman spectroscopy (CARS) measurements in a steady-state supersonic jet. The advantages of CARS measurements in the jet over Raman spectroscopy in a static cell include spectral.

    Lift in Supersonic Flight. is the central difference between supersonic and subsonic aerodynamic flow. The figure below shows a supersonic airfoil with angle of attack (θ), as the angle of attack increases the lift generated increases, up until the stall point (separation point well forward of the trailing edge). Subsonic is a related term of supersonic. Supersonic is a related term of subsonic. In context|of a speed|lang=en terms the difference between subsonic and supersonic is that subsonic is (of a speed) less than the speed of sound (in the same medium, and at the same temperature and pressure) while supersonic is (of a speed) greater than the speed of sound (in the same medium, and at the same.


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Laser Raman diagnostics in subsonic and supersonic turbulent jet diffusion flames Download PDF EPUB FB2

Get this from a library. Laser Raman diagnostics in subsonic and supersonic turbulent jet diffusion flames. [T S Cheng; J A Wehrmeyer; R W Pitz; Langley Research Center.].

Simultaneous spatially and temporally resolved point measurements of temperature, mixture fraction, major species (H 2, H 2 O, O 2, N 2), and minor species (OH) concentrations are performed in unswirled (S g = 0), low swirl (S g = ), and high swirl (S g = ) lifted turbulent hydrogen jet diffusion flames into still air.

Ultraviolet (UV) Raman scattering and laser-induced predissociative Cited by: 4. Laser Raman Scattering Measurements of Differential Molecular Diffusion in Turbulent Nonpremixed Jet Flames of H2 / CO2 Fuel L.

SMITH, R. DIBBLE,* and L. TALBOT Department ofMechanicalEngineering, Unicersity of California, Berkeley, Berkeley, CA R.

BARLOW and C. CARTER* Combustion Research Facility, Sandia National Laboratories, Lit~ermore, CA In Cited by: In this paper we report measurements of differential diffusion in nonreacting jet flows.

Pulsed laser Raman scattering spectroscopy is used to measure species concentrations in nonreacting jets of H2/CO2 into air over a range of Reynolds numbers from to 64 Measurements are also made in strained laminar opposed flows of H2/CO2 against air, where differential diffusion effects on Cited by: Abstract.

Finite-rate chemistry effects are revealed in subsonic and supersonic lifted hydrogen flames using narrowband KrF excimer laser ( nm) induced Raman scattering and fluorescence to measure simultaneously species concentrations (H 2, H 2 O, N 2, O 2, OH) and fluorescence measurement of OH concentration is quantitative since it is predissociative and insensitive to Author: R.

Pitz, T. Brown, T. Cheng, S. Nandula, J. Wehrmeyer, O. JarrettJr., G. Northam, J the simultaneous line-imaged Raman/Rayleigh laser diagnostics setup at Sandia National Laboratories. Two series of flames burning mixtures of methane and hydrogen were investigated: in the first series, the hydrogen volume fraction in the fuel was varied from 37 to 55%, whereas in the second series the jet Reynolds number Re.

Measurements in subsonic and supersonic free jets using a laser velocimeter Article (PDF Available) in Journal of Fluid Mechanics 93(01) July with Reads How we measure 'reads'.

What is an allusion in chapter 3 of the outsiders. Which is more reactive phosphorus or chlorine. Which was not a result of the baby boom that followed world war ii answers APEX. Supersonic flame lengths are compared to measured lengths of subsonic hydrogen-air flames with coflow that were stabilized on the axis of a subsonic wind tunnel for a range of fuel/air velocity.

supersonic gas jet nozzle is simulated and manufactured to produce a uniform gas density profile at a specified distance from the nozzle. The gas jet is excited into a plasma state using a laser pulse to produce a plasma waveguide, which is used to accelerate electrons through DLA. Laser Raman diagnostics in subsonic and supersonic turbulent jet diffusion flames [microform] [] Cheng, T.

Hampton, Va.: National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va.: National Technical Information Service, ]. We report a series of Raman-Rayleigh-LIF measurements in two turbulent natural-gas jet diffusion flames produced by the Delft piloted jet diffusion flame burner.

The main objective of the Raman-Rayleigh-LIF measurements was to obtain detailed information on the major species concentrations in the flames. The measurements provide simultaneous data on temperature, the concentrations of the Cited by: Research and Development, an advance copy of the pioneering paper of Raman scattering in a turbulent flame of H2 into air, later published as Drake, et al.

[1]. Bilger recognized that the laser Raman data was showing the effects of differential diffusion of H2 relative to diffusion of oxygen, nitrogen, and water. Spontaneous Raman scattering and laser-induced fluorescence are combined to perform simultaneous point measurements of major species concentrations, temperature, and hydroxyl radical concentration in turbulent nonpremixed flames.

The Raman-scattering data for major species concentrations and temperature characterize the instantaneous, local, collisional quenching environment of the OH. Supersonic Jet Exhaust Noise at High Subsonic Flight Speed [Norum, Thomas D., Nasa Technical Reports Server (Ntrs), Et Al] on *FREE* shipping on qualifying offers.

Supersonic Jet Exhaust Noise at High Subsonic Flight SpeedCited by: 7. W.H. Mason Supersonic Aerodynamics 7/31/16 The best paper to read on the B is by Erickson.1 The airplane had a poor safety record.

In part this was because the tires were very small to allow the gear to fit in the fuselage. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Non-Intrusive, Laser-Based Imaging of Jet-A Fuel Injection and Combustion Species in High Pressure, Subsonic Flows Randy J.

Locke QSS Group, Inc. Brook Park, Ohio Yolanda R. Hicks and Robert C. Anderson National Aeronautics and Space Administration Glenn Research Center Cleveland, Ohio Wilhelmus A.

de Groot QSS Group, by: 7. A subsonic aircraft is an aircraft with a maximum speed less than the speed of sound (Mach 1). The term technically describes an aircraft that flies below its critical Mach number, typically around Mach All current civil aircraft, including airliners, helicopters and airships, as.

@article{osti_, title = {Application of advanced laser diagnostics to hypersonic wind tunnels and combustion systems.}, author = {North, Simon W and Hsu, Andrea G and Frank, Jonathan H}, abstractNote = {This LDRD was a Sandia Fellowship that supported Andrea Hsu's PhD research at Texas A&M University and her work as a visitor at Sandia's Combustion Research Facility.

Thanks for the A2A opportunity. I thought about providing a long detailed response filled with images in the hope that I could actually provide one that the layman or lay person would find easy to understand. I came to the conclusion t.Numerical Simulations of a Subsonic/Supersonic Coaxial Jet for an Efficient Design of Experimental Setup D.

Guariglia*1, C. Schram1 1von Karman Institute for Fluid Dynamics *Corresponding author: Chaussée de Water Rhode-St-Genese, Belgium. [email protected] Abstract: The flow field of a coaxial jet with the.JOURNAL OF PROPULSION AND POWER Vol. 12, NO.

4, July-AuguSt Investigation of the Effect of Tabs on Supersonic Jets Using Advanced Diagnostics M. E Reeder,* M. Samimy,? and G. S. Elliott# Ohio State University, Columbus, Ohio The effect of tabs on supersonic jets has been assessed using two laser-based experimental techniques.

In the first instance, visualizations of the miXing layer.