Experiments on the Large-scale Structure of Turbulent Boundary Layers with Adverse Pressure Gradients
Author: Way-ping Lin
Publisher:
Published: 1995
Total Pages:
ISBN-13:
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Author: Way-ping Lin
Publisher:
Published: 1995
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Way-ping Lin
Publisher:
Published: 1996
Total Pages: 436
ISBN-13:
DOWNLOAD EBOOKAuthor: Shimer Zane Pinckney
Publisher:
Published: 1971
Total Pages: 68
ISBN-13:
DOWNLOAD EBOOKAuthor: P. W. Runstadler
Publisher:
Published: 1963
Total Pages: 346
ISBN-13:
DOWNLOAD EBOOKA combination of visual and quantitative measurements is presented, providing a physical picture of the turbulent boundary layer flow structure on a flat plate. The flow structure is shown to consist of three zones, each zone has a one to one correspondence to the well known regions of the u+, y+ mean velocity profile. A wall layer region is shown to exist below y+ = 10. An apparently fully turbulent region exists corresponding to the logarithmic ''law of the wall'' and the ''buffer'' region. An intermittent zone appears to agree closely with the ''wake'' deviation region. An entirely new result of the investigation is the delineation of the structure of the wall layer region. This region is shown to contain a relatively regular structure of low and high velocity fluid streaks alternating in the span direction, together with the ejection of low momentum fluid into the outer flow. Correlations are given for the rate of ejection and the streak spacing. A qualitative description of other features of the wall layer region and the character of the remainder of the boundary layer flow structure is presented. (Author).
Author: Franz Durst
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 419
ISBN-13: 3642776744
DOWNLOAD EBOOKThis 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: David Michael Driver
Publisher:
Published: 1989
Total Pages: 268
ISBN-13:
DOWNLOAD EBOOKAuthor: Stefano Discetti
Publisher: CRC Press
Published: 2017-03-16
Total Pages: 454
ISBN-13: 1498704026
DOWNLOAD EBOOKExperimental Aerodynamics provides an up to date study of this key area of aeronautical engineering. The field has undergone significant evolution with the development of 3D techniques, data processing methods, and the conjugation of simultaneous measurements of multiple quantities. Written for undergraduate and graduate students in Aerospace Engineering, the text features chapters by leading experts, with a consistent structure, level, and pedagogical approach. Fundamentals of measurements and recent research developments are introduced, supported by numerous examples, illustrations, and problems. The text will also be of interest to those studying mechanical systems, such as wind turbines.
Author: Peter William Runstadler (Jr.)
Publisher:
Published: 1963
Total Pages: 342
ISBN-13:
DOWNLOAD EBOOKAuthor: Peter Sten Andersen
Publisher:
Published: 1972
Total Pages: 230
ISBN-13:
DOWNLOAD EBOOKAuthor: Hal L. Moses
Publisher:
Published: 1964
Total Pages: 85
ISBN-13:
DOWNLOAD EBOOKThe problem of predicting the behavior of the incompressible turbulent boundary layer in an adverse pressure gradient is re-examined. An outline of the problem is given along with a brief summary of the work that has already been done, including both experimental investigation are presented for a separating turbulent boundary layer with various pressure distributions. An approximate theory is developed in which the momentum integral equation is satisfied for each half of the boundary layer. The velocity profiles used in the analysis consist of the well known wall and wake regions, resulting in a two-parameter family with the Reynolds number as one parameter. It is assumed, with some experimental justification, that the eddy viscosity can be reasonably approximated from zero pressure gradient experimets. The numerical calculations, using the Runge-Kutta procedure, show good agreement with the experiments. The reliability that can be expected of such approximate methods is discussed. (Author).