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3 edition of Optimization of jet mixing into a rich, reacting crossflow found in the catalog.

Optimization of jet mixing into a rich, reacting crossflow

Optimization of jet mixing into a rich, reacting crossflow

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  • 10 Currently reading

Published by National Aeronautics and Space Administration, Lewis Research Center, Available from National Technical Information Service, distributor in [Cleveland, Ohio], Springfield, VA .
Written in English

    Subjects:
  • Jet mixing flow.,
  • Cross flow.,
  • Combustion chambers.,
  • Gas turbines.,
  • Orifices.

  • Edition Notes

    StatementM.Y. Leong and G.S. Samuelsen, J.D. Holdeman.
    SeriesNASA/TM -- 97-206294.
    ContributionsHoldeman, J. D., Samuelsen, G. S., Lewis Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15543172M

    The configuration of a jet issuing from a pipe into a crossflow (JICF) appears frequently in chemical, pharmaceutical, environmental and combustion engineering, to name but a few application areas. The complex vortical structures of this flow and its good mixing capabilities make it a target of intense investigation for both experimental and.   A laboratory investigation into the influence of a rigid vegetation on the evolution of a round turbulent jet discharged within a cross flow Journal of Environmental Management, Vol. Puffing-enhanced fuel/air mixing of an evaporating -decane/ethanol emulsion droplet and a droplet group under convective heating.

      Jet in crossflow mixing 1. Effect of Jet Configuration on Transverse Jet Mixing Process Sin Hyen Kim, Yonduck Sung, Venkat Raman Department of Aerospace Engineering and Engineering Mechanics The University of Texas at Austin 2. CFD evaluation of a jet in cross flow related to a gas turbine burner Master’s Thesis in Applied Mechanics The optimization is performed in order to acquire the most the behavior of fluid flow and turbulent mixing in a jet in cross flow is investigated.

    Of these structures, the CVP is the dominant vortical structure in the wake of the jet and contributes in a large part to the enhanced mixing characteristics of the jet with the cross flow. The formation of the CVP, and it's structure, has been linked to the periodic vortex ring rollup from the jet shear layers [5]. Streamlines originating in the crossflow fluid show entrainment of the crossflow fluid by the jet. The term, 'jet in crossflow' refers to a jet of fluid that exits an orifice to interact with the surrounding fluid that is flowing across the orifice. Jets in crossflow are central to a variety of applications such as dilution holes in gas-turbine combustors, fuel injectors, and pollutant dispersion from smoke stacks.


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Optimization of jet mixing into a rich, reacting crossflow Download PDF EPUB FB2

Radial jet Optimization of jet mixing into a rich of pure air into a fuel-rich, reacting crossflow confined to a cylindrical geometry is addressed with a focus on establishing an optimal jet orifice geometry. The purpose of this investigation was to determine the number of round holes that most effectively mixes the jets with the mainstream flow, and thereby minimizes the.

Radial jet mixing of pure air into a fuel-rich, reacting crossflow confined to a cylindrical geometry is addressed with a focus on establishing an optimal jet orifice geometry. The purpose of this investigation was to determine the number of round holes that most effectively mixes the jets with the mainstream flow, and thereby minimizes the residence time of near-stoichiometric and unreacted packets.

Radial jet mixing of pure air into a fuel-rich, reacting crossflow confined to a cylindrical geometry is addressed with a focus on establishing an optimal number of jet orifices.

Note that the optimum would not be expected to be by: Mixing of Jet Air with a Fuel-Rich, Reacting Crossflow. Design and optimization of mixing structure of fully premixed surface burner.

7 January | IOP Conference Series: Materials Science and Engineering, Vol. Optimization of jet mixing into a rich, reacting by: Optimization of Jet Mixing Into a Rich, Reacting Crossflow.

May Ying Leong, G. Scott Samuelsen, James D. Holdeman; Physics; (First Publication: 1 September ) Radial jet mixing of pure air into a fuel-rich, reacting crossflow confined to a cylindrical geometry is addressed with a focus on establishing an optimal number of jet orifices.

Optimization of Circular Orifice Jets Mixing Into a Heated Cross Flow in a Cylindrical Duct J.T. Kroll, W.A. Sowa, and G.S. Samuelsen University of California Irvine, California Prepared for the 31st Aerospace Sciences Meeting sponsored by the American Institute of Aeronautics and Astronautics Reno, Nevada, JanuaryNASA.

Many gas turbine combustion systems employ swirl to help mix fuel and air and subsequently stabilize the reaction. In the case of liquid fuels, strategic introduction of the liquid into the swirling flow can provide improved combustion performance.

In the present work, radial injection of a plain jet into a swirling flow is considered. Sufficient mixing between the supersonic airstream and the injectant is critical for the design of scramjet engines.

The information in the two-dimensional supersonic jet-to-crossflow flow field has been explored numerically and theoretically, and the numerical approach has been validated against the available experimental data in the open literature. Theory of Jets Division of Safety and Fire Engineering, School of Engineering, CUSAT and four distinct zones have been identified from these studies.

In ASHRAE literature the development of a jet is divided into four zones, related to centreline velocity decay. The structure of a free jet is shown in Fig [Yue.Z, ].

Radial jet mixing of pure air into a fuel-rich, reacting crossflow confined to a cylindrical geometry is addressed with a focus on establishing an optimal jet orifice geometry. In many advanced low NOx gas turbine combustion techniques, such as rich-burn/quick-mix/lean-burn (RQL), jet mixing in a reacting, hot, fuel-rich crossflow plays an important role in minimizing all pollutant emissions and maximizing combustion by: 7.

To examine the mixing characteristics of jets in an axi-symmetric can geometry, temperature measurements were obtained downstream of a row of cold jets injected into a heated cross stream.

Parametric, non-reacting experiments were conducted to determine the influence of geometry and flow variations on mixing patterns in a cylindrical configuration.

Get this from a library. Optimization of jet mixing into a rich, reacting crossflow. [M Y Leong; J D Holdeman; G S Samuelsen; Lewis Research Center.]. The jet mixing process has different active research fields in a wide range of processes, such as chemical extraction, chemical reaction, absorption, desorption, reaction injec‑ tion moulding (RIM) mixture, etc.2 In jet mixing, a part of the fluid existing in the tank moves at high velocity into the tank with the use of a pump and through.

Holdeman. Ph.D Optimization of Jet Mixing Into a Rich, Reacting Crossflow. Article. Optimization of circular orifice jets mixing into a heated cross flow in a cylindrical duct. Temperature uniformity after a mixing process plays a very important role in many applications.

Non-uniform temperature at the entrance of the turbine in gas turbine systems has an adverse effect on the life of the blades. These temperature non-uniformities cause thermal stresses in the blades leading to higher maintenance costs.

This paper presents experimental and numerical results for. Numerical investigation of Jets in A Reactîng Crossflow Hanan Urson Master of Applied Science Graduate Department of Mechanical and Industriai Engineering University of Toronto The mixing of air jets into hot, fuel-rich mixture is an integral part of many staged combustion applications.

Jet Mixing Into a Heated Cross Flow in a Cylindrical Duct: Influence of Geometry and Flow Variations Li, Z., Shih, T.

I.-P., and Nguyen, H. L.,“Simulation of Mixing in the Quench Zone of a Rich Burn-Quick Quench Mix-Lean Burn Combustor,” AIAA Paper No. S., and Holdeman, J. D.,“Jet Mixing in a Reacting. ABSTRACT.

A model has been developed for the numerical simulation of liquid jet atomization in a subsonic crossflow. The proposed model simulates the effects of jet bending and penetration prior to column fracture, droplet secondary breakup due to aerodynamic forces, changes in droplet drag due to distortion during breakup, and droplet dispersion due to gas-phase turbulence and drop breakup.

Leong MY, Samuelsen GS, Holdeman JD () Optimization of jet mixing into a rich, reacting crossflow. J Propuls Power 16(5)– (also AIAA and NASA/TM–, Dec. ; see also NASA CR, Sept.

) Google Scholar. The mixing of the round jet normal to a uniform crossflow is studied for a range of jet-to-crossflow velocity ratios, r, from 5 to Planar laser-induced fluorescence (PLIF) of acetone vapour seeded into the jet is used to acquire quantitative two-dimensional images of the scalar concentration field.react with the air.

Otherwise, the combustion is incomplete due to the poor distribution and mixing. For the current study, the central toroidal recirculation zone (CTRZ) shifted slightly off-axis near the location of the primary jet injection and may not trap all the spray droplets.

According to Durbin et al. [6], this is a sign of low swirl. The.Margason, R. J.,“Fifty Years of Jet in Cross Flow Research,” Computational and Experimental Assessment of Jets in Cross Flow, AGARD Conference Proceedings Margason, R. J. and Tso, J.,“Jet to Freestream Velocity Ratio Computations for a Jet in a Crossflow,” AIAA Paper