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Dynamic Behavior Of A Dense Spray Diffusion Flame In A Potential Vortex Diffusion Flame
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Book Synopsis DYNAMIC BEHAVIOR OF A DENSE SPRAY DIFFUSION FLAME IN A POTENTIAL VORTEX (DIFFUSION FLAME). by : SHEAU-MING SHIAH
Download or read book DYNAMIC BEHAVIOR OF A DENSE SPRAY DIFFUSION FLAME IN A POTENTIAL VORTEX (DIFFUSION FLAME). written by SHEAU-MING SHIAH and published by . This book was released on 1992 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: approximation of a viscous vortex by a potential vortex are also developed.
Book Synopsis On the Interaction of a Dense Spray Diffusion Flame and a Potential Vortex by : Sheau-Ming Shiah
Download or read book On the Interaction of a Dense Spray Diffusion Flame and a Potential Vortex written by Sheau-Ming Shiah and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Unsteady One-dimensional Homogeneous Diffusion Flames at Constant Pressure by : Fernando de Souza Costa
Download or read book Analysis of Unsteady One-dimensional Homogeneous Diffusion Flames at Constant Pressure written by Fernando de Souza Costa and published by . This book was released on 1995 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the ASME Heat Transfer and Fluids Engineering Divisions by : American Society of Mechanical Engineers. Heat Transfer Division
Download or read book Proceedings of the ASME Heat Transfer and Fluids Engineering Divisions written by American Society of Mechanical Engineers. Heat Transfer Division and published by . This book was released on 1995 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ignition Dynamics of a Laminar Diffusion Flame in the Field of a Vortex Embedded in a Shear Flow by : Michele G. Macaraeg
Download or read book Ignition Dynamics of a Laminar Diffusion Flame in the Field of a Vortex Embedded in a Shear Flow written by Michele G. Macaraeg and published by . This book was released on 1994 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 31st Aerospace Sciences Meeting and Exhibit: 93-0880 - 93-0924 by :
Download or read book 31st Aerospace Sciences Meeting and Exhibit: 93-0880 - 93-0924 written by and published by . This book was released on 1993 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1992-11 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1991 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Structure and Stability of Diffusion Flames by : Sally Ann Cheatham
Download or read book On the Structure and Stability of Diffusion Flames written by Sally Ann Cheatham and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Diffusion flames are flames in which fuel and oxidant, initially separate, come together to react chemically in a relatively thin combustion zone. Asymptotic methods, supplemented by numerical computation, are used to analyze the structure and dynamical properties of such flames. Attention is first focused on diffusion flames in arbitrary fluid flows for general fuel and oxidant Lewis numbers, in which the combustion is complete or nearly complete. Thus the limit of large Damkohler number and large activation energy is considered. The resulting mathematical formulation consists of a free boundary problem, with the flame as the free boundary. Such a treatment greatly simplifies the governing system of equations, and provides a framework for the analysis of the flame structure as well as its dynamical properties. The stability of a planar flame is next considered, with attention focused on diffusional-thermal effects. A dispersion relation is obtained, which relates the growth parameter and wavenumber of disturbances to the fuel and oxidant Lewis numbers, supply temperatures, and supply concentrations. Analysis of the dispersion relations indicates that instability corresponding to cellularity of the flame may occur for lean flames under near extinction conditions when the Lewis numbers of fuel and oxidant are sufficiently low. The asymptotic model is also used to identify conditions under which flame extinction occurs. In particular, the burning characteristics of a dilute spray diffusion flame have been examined. The presence of fuel droplets in the fuel supply is shown to alter the extinction characteristics of the flame. The onset of oscillations in the spherical diffusion flame surrounding a fuel droplet is also considered. Motivated by recent microgravity candle flame experiments, the constraint of a weak oxidant environment is imposed. A linear stability analysis indicates that oscillations may indeed result when radiative heat losses and the Lewis numbers of fuel and oxidant are sufficiently large. Estimates for the critical conditions are given, along with a prediction of the resulting frequency of oscillation. A weakly non-linear analysis is then used to more fully investigate the transition to an oscillatory burning state.
Book Synopsis Structure of Confined Laminar Spray Diffusion Flames/numerical Investigation by : M. A. Mawid
Download or read book Structure of Confined Laminar Spray Diffusion Flames/numerical Investigation written by M. A. Mawid and published by . This book was released on 1993 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Momentum Diffusion Flame Characteristics and the Effects of Water Spray by : Bernard J. McCaffrey
Download or read book Momentum Diffusion Flame Characteristics and the Effects of Water Spray written by Bernard J. McCaffrey and published by . This book was released on 1986 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: For water spray suppression of gas well blowout fire applications, reasonably large scale (1-10 MW) methane diffusion flames have been investigated near the high Froude number limit. Flame blow-off has been observed with pipe sizes to 30 mm diameter. Flame and lift-off heights, centerline temperatures and incident radiative flux to nearby targets have been measured with and without water spray suppressant. Using the Dayan-Tien formulation for a cylindrical flame model an effective gray absorption coefficient approaching 0.2/m was determined at the blow-off limit. The derived shape of the functional dependence of decreasing radiative fraction with jet Froude number in the limit is consistent with small scale experiments. The effect of spraying water internal to the flame envelope at the base is to shift or raise the flame above its normal position and to lower peak flame temperature and radiation levels despite increased absorptivity due to the radiatively active steam. Extinguishment near blowoff is thought due to the former effect. Calculations of flame entrainment based on increased water vapor emission are consistent with literature estimates of entrainment when account of the effects of buoyancy due to the liquid spray is provided.
Book Synopsis Vortex-scalar Element Calculations of a Diffusion Flame Stabilized on a Plane Mixing Layer by : Ahmed F. Ghoniem
Download or read book Vortex-scalar Element Calculations of a Diffusion Flame Stabilized on a Plane Mixing Layer written by Ahmed F. Ghoniem and published by . This book was released on 1987 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722289911 Total Pages :38 pages Book Rating :4.2/5 (899 download)
Book Synopsis Ignition Dynamics of a Laminar Diffusion Flame in the Field of a Vortex Embedded in a Shear Flow by : National Aeronautics and Space Administration (NASA)
Download or read book Ignition Dynamics of a Laminar Diffusion Flame in the Field of a Vortex Embedded in a Shear Flow written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-05 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of streamwise-spanwise vorticity interactions that occur in turbulent shear flows on flame/vortex interactions is examined by means of asymptotic analysis and numerical simulation in the limit of small Mach number. An idealized model is employed to describe the interaction process. The model consists of a one-step, irreversible Arrhenius reaction between initially unmixed species occupying adjacent half-planes which are then allowed to mix and react in the presence of a streamwise vortex embedded in a shear flow. It is found that the interaction of the streamwise vortex with shear gives rise to small-scale velocity oscillations which increase in magnitude with shear strength. These oscillations give rise to regions of strong temperature gradients via viscous heating, which can lead to multiple ignition points and substantially decrease ignition times. The evolution in time of the temperature and mass-fraction fields is followed, and emphasis is placed on the ignition time and structure as a function of vortex and shear strength. Macaraeg, Michele G. and Jackson, T. L. and Hussaini, M. Y. Langley Research Center NAS1-19480; RTOP 505-90-52-01...
Book Synopsis Fluid Dynamics and Transport of Droplets and Sprays by : W. A. Sirignano
Download or read book Fluid Dynamics and Transport of Droplets and Sprays written by W. A. Sirignano and published by Cambridge University Press. This book was released on 2010-01-11 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the theoretical foundations of spray and droplet applications relevant to the technology for active control of sprays applied to new products and applications, improved product performance, cost reductions, and improved environmental outcomes. It also covers theory related to power and propulsion; materials processing and manufacturing technologies including droplet-based net form processing, coating, and painting; medication; pesticides and insecticides; and other consumer uses.
Book Synopsis Observations of Liquid Spray Diffusion Flame by : Heramb Girish Karnataki
Download or read book Observations of Liquid Spray Diffusion Flame written by Heramb Girish Karnataki and published by . This book was released on 2017 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
