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Turbulent Annular Swirl Flows

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Numerical Solution Of Turbulent Annular Swirl Flows

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Author : Claus J. Boerner
language : en
Publisher:
Release Date : 1970

Numerical Solution Of Turbulent Annular Swirl Flows written by Claus J. Boerner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.

The time averaged Navier-Stokes equations for quasi-steady, axisymmetric, incompressible turbulent flow were solved for an annular geometry. The effects of turbulent interactions are incorporated through the use of two apparent turbulent viscosities which are computed separately for the axial and the tangential momentum equation. Several equations are tested which link the apparent turbulent viscosity in the tangential momentum equation to the tangential velocity profile at each axial location. Best results, as measured by the agreement with experimental data, were obtained with a model that links the viscosity to the tangential velocity via the average flow angle, the wall shear velocity, and the distance of the zero shear location normal to the wall. For four different nominal flow angles at the inlet cross section, the numerical solutions were obtained. Comparisons with experimental data were possible at seven axial locations. The agreement was satisfactory to good in all cases. (Author).

Turbulent Annular Swirl Flows

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Author : C. J. Scott
language : en
Publisher:
Release Date : 1973

Turbulent Annular Swirl Flows written by C. J. Scott and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with categories.

The report presents a brief summary of the swirl research done at the University of Minnesota up to the present and retails the characteristics of a new apparatus under construction and evaluation since July, 1970. The purpose of this apparatus is to study turbulent transport properties in non-decaying, swirling, annular vortex flows. By generating fully-developed, axial and tangential velocity profiles, coupled with fully developed temperature profiles, using an adiabatic, rotating inner wall and a stationary constant-heat-flux, outer wall, experimental values of the eddy diffusivities for momentum and heat were obtained. These transport coefficients are found to be influenced differently by the swirl distribution. (Modified author abstract).

Swirl Flows

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Author : Ashwani K. Gupta
language : en
Publisher: Routledge
Release Date : 1984

Swirl Flows written by Ashwani K. Gupta and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Science categories.

Further Experiments On Turbulent Exchange In Swirling Flows Through An Annular Channel

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Author : Wolfgang Leuckel
language : en
Publisher:
Release Date : 1970

Further Experiments On Turbulent Exchange In Swirling Flows Through An Annular Channel written by Wolfgang Leuckel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.

Decay Of Turbulent Swirl In An Annular Duct

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Author : Dean R. Rask
language : en
Publisher:
Release Date : 1970

Decay Of Turbulent Swirl In An Annular Duct written by Dean R. Rask and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.

An experimental investigation was carried out to determine fluid dynamic properties of turbulent vortex flows; i.e., flows with both tangential and axial mean velocities, in a concentric annular duct. The working fluid was air and the flow was incompressible. All measurements were made at a nominal Reynolds number of 130,000. The average axial velocity was on the order of 90 ft/sec. Measurements were made with both a cylindrical pressure probe and a hot film probe. The swirl imparted to the flow in the inlet decayed as the flow moved down the test section. Extensive surveys of the velocity field were made for five different swirl rates with one of the swirl rates being that of zero swirl or straight flow. The term swirl rate refers to the relative magnitude of the inlet tangential velocity. Local axial skin-friction coefficients at the inner wall were determined at seven different axial locations for all five swirl rates. For the swirl rates tested, no regular shift in the skin-friction distribution is noted with increasing swirl rate except at the highest swirl rate where the distribution is considerably below the others. At the inner wall, axial velocity profiles were also presented in terms of law-of-the-wall variables. Good to relatively poor agreement with the universal velocity-distribution was achieved. (Author).

A Numerical Investigation Of Coaxial Annular Swirling Flows

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Author : Claude Jean Coudeyras
language : en
Publisher:
Release Date : 1975

A Numerical Investigation Of Coaxial Annular Swirling Flows written by Claude Jean Coudeyras and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Laminar flow categories.