Analysis Of Axisymmetric Compressible Rotating Free Jets
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Analysis Of Axisymmetric Compressible Rotating Free Jets
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Author : Amnon Chervinsky
language : en
Publisher:
Release Date : 1967
Analysis Of Axisymmetric Compressible Rotating Free Jets written by Amnon Chervinsky and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with categories.
Analysis Of Axisymmetric Free Turbulent Rotating Jets
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Author : Nehemiah A. Chigier
language : en
Publisher:
Release Date : 1966
Analysis Of Axisymmetric Free Turbulent Rotating Jets written by Nehemiah A. Chigier and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with categories.
Turbulent Mixing Of Axisymmetric Compressible Jets
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Author : Randall C. Maydew
language : en
Publisher:
Release Date : 1963
Turbulent Mixing Of Axisymmetric Compressible Jets written by Randall C. Maydew and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with Jets categories.
Velocity profiles at five axial stations in the half-jet mixing region of Mach 0.7, 0.85, 0.95, 1.49, and 1.96 free jets were measured. The nondimensional velocity distributions are similar, and correlate with the theory of Crane for incompressible flow. The half-jet spreading rate is essentially constsnt at subsonic speeds and decreases at supersonic speeds. The variation of jet spreading parameter with Mach number was determined from correlation of these and other data.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1995
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.
Experimental Investigation Of An Axisymmetric Fully Developed Laminar Free Jet
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Author : Eugene P. Symons
language : en
Publisher:
Release Date : 1971
Experimental Investigation Of An Axisymmetric Fully Developed Laminar Free Jet written by Eugene P. Symons and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Laminar flow categories.
An experimental investigation was conducted to determine dynamic characteristics of a circular, fully developed, laminar free jet. Complete velocity profiles are presented at Reynolds numbers of 437 and 1839 at 0, 3, 6, 10, 15, and 25 diameters from the nozzle exit. Centerline velocity decay was obtained over a range of Reynolds numbers from 255 to 1839. Also presented are the angles of spread associated with the diffusion of the jet downstream of the nozzle. Where possible, results are compared with those obtained for laminar jets having an initially flat or uniform velocity profile at the nozzle exit.
Turbulent Nonisothermal Jets Of A Compressible Gas Of Variable Composition
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Author : A. S. Ginevskii
language : en
Publisher:
Release Date : 1967
Turbulent Nonisothermal Jets Of A Compressible Gas Of Variable Composition written by A. S. Ginevskii and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with categories.
A compressible turbulent jet of variable composition is analyzed using the integral method. The analysis is divided into six parts, with the following assumptions holding throughout: the flow is isobaric, the specific heat of each component in the jet is temperature-independent, pressure and thermal diffusion are neglected, the density is determined from the Clapeyron equation, and there are no chemical reactions. Part 1 treats a plane nonisothermal jet in a wake with Pr sub t = Pr sub d = 1 at high velocities, the governing boundary layer equation, and the energy equation. In Part 2, the same problem is analyzed for an axisymmetric jet. Part 3 is the same as Parts 1 and 2 combined, except that the flow velocity is assumed to be very low. The results of the analysis are shown as velocity profile curves for various radial temperature distributions. In Parts 4-6, the conditions Pr sub t = Pr sub d = 1 are relaxed. (Author).
Experimental And Theoretical Studies Of Axisymmetric Free Jets
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Author :
language : en
Publisher:
Release Date : 1959
Experimental And Theoretical Studies Of Axisymmetric Free Jets written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Aerodynamics categories.
Some experimental and theoretical studies have been made of axisymmetric free jets exhausting from sonic and supersonic nozzles into still air and into supersonic streams with a view toward problems associated with propulsive jets and the investigation of these problems. For jets exhausting into still air, consideration is given to the effects of jet Mach number, nozzle divergence angle, and jet static-pressure ratio upon jet structure, jet wavelength, and the shape and curvature of the jet boundary. Studies of the effects of the ratio of specific heats of the jets are included as are observations pertaining to jet noise and jet simulation. For jets exhausting into supersonic streams, an attempt has been made to present primarily theoretical curves of the type that may be useful in evaluating certain jet interference effects and in formulating experimental studies. The primary variables considered are jet Mach number, free-stream Mach number, jet static-pressure ratio, ratio of specific heats of the jet, nozzle exit angle, and boattail angle. The simulation problem and the case of a hypothetical hypersonic vehicle are examined. A few experimental observations are included.
An Approximate Solution For The Axisymmetric Jet Of A Laminar Compressible Fluid
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Author : Gdalia Kleinstein
language : en
Publisher:
Release Date : 1961
An Approximate Solution For The Axisymmetric Jet Of A Laminar Compressible Fluid written by Gdalia Kleinstein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with Axial flow categories.
An extension of the modified-Oseen method of Carrier, based on the linearization of the viscous term of the von Mises transformation, is presented. The method is employed to determine the velocity field associated with the laminar axisymmetric jet flow of a compressible gas with an arbitrary but constant external flow. The approximate solution is shown to be in good agreement with the exact numerical calculation of Pai.
Turbulent Mixing Of Axisymmetric Jets Of Partially Dissociated Nitrogen With Ambient Air
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Author : T. J. O'Connor
language : en
Publisher:
Release Date : 1965
Turbulent Mixing Of Axisymmetric Jets Of Partially Dissociated Nitrogen With Ambient Air written by T. J. O'Connor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
Recent attempts to predict the heat transfer from a high enthalpy, compressible free jet impinging upon surfaces in its path have suffered from a complete lack of knowledge concerning the behavior of turbulent jets of dissociated gases. Although it had been assumed that high enthalpy gas streams would exhibit the characteristics of cold jets, which have been subjected to extensive study, there had been no experimental evidence to support this contention. A research program was conducted to determine radial and axial variations in fluid properties, i.e., velocity, density, enthalpy, etc., in compressible free jets of dissociated gases produced by electric-arc plasma generators. Experimental investigations were confined to the near flowfield of the jets, since 90 percent of change in jet fluid properties, from their initial values at the arc nozzle-exit plane to the properties of the ambient fluid, was accomplished within 40 nozzle radii from the jet origin. Heat-transfer rates from these jets, when impinging upon a flat surface perpendicular to the jet axis, were determined experimentally. Correlation of this data could then be accomplished by means of a relationship similar to those for stagnation-point heat transfer to blunt bodies in a uniform stream when local jet properties were employed. (Author).
Direct Numerical Simulation Of Axisymmetric Jets
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Author : F. F. Grinstein
language : en
Publisher:
Release Date : 1986
Direct Numerical Simulation Of Axisymmetric Jets written by F. F. Grinstein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
We present results from numerical simulations of the evolution of the Kelvin-Helmholtz instability for an unforced, subsonic, compressible axisymmetric, spatially-evolving shear layer. In addition, we study the effect of small, random pressure fluctuations at the nozzle orifice on the growth of the mixing layers. These fluctuations model inflow perturbations in experimental flows arising from turbulence and boundary layers in the nozzle. The finite-difference numerical model used to perform the simulations solves the two-dimensional time-dependent conservation equations for an ideal fluid using the Flux-Corrected Transport algorithm and timestep-splitting techniques. No subgrid turbulence model has been included. In the absence of perturbations, the calculations indicate that the large scale development of the unforced jet shear layer has an underlying degree of organization. This is the result of a feedback mechanism in which the shear layer ahead of nozzle edge is modulated by the far field induced gy the mergings on downstream, near the end of the potential core of the jet. The studies with random high frequency perturbations on the inflow velocity show that they effectively tend to break the temporal correlations between the structures. Keywords: Coherent structures; Free Shear flows.