Surface Curvature and Pressure Gradient Effects on Turbulent Flow PDF Download
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Author: Marshall Charles Richmond
Publisher:
ISBN:
Category : Navier-Stokes equations
Languages : en
Pages : 490
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Book Description
Author: Marshall Charles Richmond
Publisher:
ISBN:
Category : Navier-Stokes equations
Languages : en
Pages : 490
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Book Description
Author: V.C. Patel
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
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Book Description
Author: Arloe W. Mayne (Jr.)
Publisher:
ISBN:
Category : Curvature
Languages : en
Pages : 40
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Book Description
Author: Franz Durst
Publisher: Springer Science & Business Media
ISBN: 3642776744
Category : Science
Languages : en
Pages : 419
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Book Description
This volume contains a selection of the papers presented at the Eighth Symposium on Turbulent Shear Flows held at the Technical University of Munich, 9-11 September 1991. The first of these biennial international symposia was held at the Pennsylvania State Uni versity, USA, in 1977; subsequent symposia have been held at Imperial College, London, England; the University of California, Davis, USA; the University of Karlsruhe, Ger many; Cornell University, Ithaca, USA; the Paul Sabatier University, Toulouse, France; and Stanford University, California, USA. The purpose of this series of symposia is to provide a forum for the presentation and discussion of new developments in the field of turbulence, especially as related to shear flows of importance in engineering and geo physics. From the 330 extended abstracts submitted for this symposium, 145 papers were presented orally and 60 as posters. Out of these, we have selected twenty-four papers for inclusion in this volume, each of which has been revised and extended in accordance with the editors' recommendations. The following four theme areas were selected after consideration of the quality of the contributions, the importance of the area, and the selection made in earlier volumes: - wall flows, - separated flows, - compressibility effects, - buoyancy, rotation, and curvature effects. As in the past, each section corresponding to the above areas begins with an introduction by an authority in the field that places the individual contributions in context with one another and with related research.
Author: Marshall Charles Richmond
Publisher:
ISBN:
Category :
Languages : en
Pages : 345
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722369682
Category :
Languages : en
Pages : 84
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Book Description
Boundary layer transition and development on a turbomachinery blade is subjected to highly periodic unsteady turbulent flow, pressure gradient in longitudinal as well as lateral direction, and surface curvature. To study the effects of periodic unsteady wakes on the concave surface of a turbine blade, a curved plate was utilized. On the concave surface of this plate, detailed experimental investigations were carried out under zero and negative pressure gradient. The measurements were performed in an unsteady flow research facility using a rotating cascade of rods positioned upstream of the curved plate. Boundary layer measurements using a hot-wire probe were analyzed by the ensemble-averaging technique. The results presented in the temporal-spatial domain display the transition and further development of the boundary layer, specifically the ensemble-averaged velocity and turbulence intensity. As the results show, the turbulent patches generated by the wakes have different leading and trailing edge velocities and merge with the boundary layer resulting in a strong deformation and generation of a high turbulence intensity core. After the turbulent patch has totally penetrated into the boundary layer, pronounced becalmed regions were formed behind the turbulent patch and were extended far beyond the point they would occur in the corresponding undisturbed steady boundary layer. Schobeiri, M. T. and Radke, R. E. Glenn Research Center...
Author: Peter Bradshaw
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 146
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Book Description
Streamline curvature in the plane of the mean shear produces large changes in the turbulence structure of shear layers, usually an order of magnitude more important than normal pressure gradients and other terms in the mean-motion equations for curved flows. The effects on momentum and heat transfer in boundary layers are noticeable on typical wing sections and are very important on highly-cambered turbomachine blades: turbulence may be nearly eliminated on highly-convex surfaces, while on highly-concave surfaces momentum transfer by quasi-steady longitudinal vortices dominates the ordinary turbulence processes. The greatly enhanced mixing rates of swirling jets and the characteristic non-turbulent cores of trailing vortices are also consequences of the effects of streamline curvature on the turbulence structure. A progress report, comprises a review of current knowledge, a discussion of methods of predicting curvature effects, and a presentation of principles for the guidance of future workers.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 86
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Book Description
Author: James Liburdy
Publisher:
ISBN: 9781955101103
Category :
Languages : en
Pages :
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Author: Andrew D. Cutler
Publisher:
ISBN:
Category : Air flow
Languages : en
Pages : 296
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Book Description
