Download or read book Some Measurements of a Wake boundary Layer Interaction written by R. Eichhorn and published by . This book was released on 1961 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: When a strut or other object is attached to a surface along which a fluid flows, the strut disturbs the boundary layer flow and the wake region of the strut interacts with the boundary layer along the surface giving rise to complicated three dimensional effects. In the present paper these effects were investigated for the geometry consisting of a 2 in. diameter cylinder in uniform axial flow to which was attached normally a 3/16 inch diameter dowel forming a strut. The measurements reported include both static and total pressure surveys in the wake-boundary layer region behind the strut. The resulting wake velocity profiles far from the interaction region behave normally but those within this region do note. The existence of vortices is in some cases clearly seen.
Download or read book Some Measurements of a Wake boundary Layer Interaction written by R. Eichhorn and published by . This book was released on 1960 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: When a strut or other object is attached to a surface along which a fluid flows, the strut disturbs the boundary layer flow and the wake region of the strut interacts with the boundary layer along the surface giving rise to complicated three dimensional effects. In the present paper these effects were investigated for the geometry consisting of a 2 in. diameter cylinder in uniform axial flow to which was attached normally a 3/16 inch diameter dowel forming a strut. The measurements reported include both static and total pressure surveys in the wake-boundary layer region behind the strut. The resulting wake velocity profiles far from the interaction region behave normally but those within this region do note. The existence of vortices is in some cases clearly seen.
Download or read book Measurements in a 2 D Wake and in a 2 D Wake Merging Into a Boundary Layer written by P. J. Pot and published by . This book was released on 1979 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boundary layer and Wake Measurements on a Swept Circulation control Wing written by F. W. Spaid and published by . This book was released on 1987 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transition Location Effect on Shock Wave Boundary Layer Interaction written by Piotr Doerffer and published by Springer Nature. This book was released on 2020-07-30 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents experimental and numerical findings on reducing shock-induced separation by applying transition upstream the shock wave. The purpose is to find out how close to the shock wave the transition should be located in order to obtain favorable turbulent boundary layer interaction. The book shares findings obtained using advanced flow measurement methods and concerning e.g. the transition location, boundary layer characteristics, and the detection of shock wave configurations. It includes a number of experimental case studies and CFD simulations that offer valuable insights into the flow structure. It covers RANS/URANS methods for the experimental test section design, as well as more advanced techniques, such as LES, hybrid methods and DNS for studying the transition and shock wave interaction in detail. The experimental and numerical investigations presented here were conducted by sixteen different partners in the context of the TFAST Project. The general focus is on determining if and how it is possible to improve flow performance in comparison to laminar interaction. The book mainly addresses academics and professionals whose work involves the aerodynamics of internal and external flows, as well as experimentalists working with compressible flows. It will also be of benefit for CFD developers and users, and for students of aviation and propulsion systems alike.
Download or read book Evaluation of Boundary layer and Wake survey Data reduction Techniques in Compressible Flows written by K. R. Czarnecki and published by . This book was released on 1968 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mean Flow Measurements in the Boundary Layer and Wake of a Series 60 Block Coefficient written by Y. Toda and published by . This book was released on 1988 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented from a towing-tank experiment of propeller-hull interaction conducted in order to provide detailed documentation of the complete flow field appropriate both for explicating the flow physics and validating computational methods. Mean-velocity and pressure field measurements were made for the with- and without-propeller conditions for the Series 60 block coefficient = .6 hull form at numerous stations both upstream and downstream of the propeller and in the near wake region. Surface-pressure distributions and wave profiles were measured for both conditions. Resistance and self-propulsion tests were also conducted. The experimental equipment and procedures are described, and the results are discussed to point out the essential differences between the flows with and without propeller. The results are analyzed to assess the nature of the interaction between the propeller and the hull boundary layer and wake. To this end, use is made of a propeller-performance program with both nominal and effective inflows. It is shown that most features of the interaction can be explained as a direct consequence of the propeller loading resulting from its operation with a three-dimensional nonuniform inflow. (fr).
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1970 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1961 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Structure of Turbulent Shear Flow written by A. A. R. Townsend and published by Cambridge University Press. This book was released on 1976 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Develops a physical theory from the mass of experimental results, with revisions to reflect advances of recent years.
Download or read book Interactions Between Wavemaking and the Boundary Layer and Wake of a Ship Model written by A. Shahshahan and published by . This book was released on 1986 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed experimental study has been conducted in a towing tank on a 3.048 meter long mathematical model, known as the Wigley hull, to study the effects of viscosity on the wavemaking resistance of the ship form. The measurements included total resistance, viscous resistance, pressure distribution, and boundary layer measurements of the model at zero trim and sinkage. The three dimensional boundary layer measurements extend from midship to a distance of 0.1 model lengths downstream of the eastern and include the pressure distribution on the body, and three components of the mean velocity measured by means of a five hole pitot tube. These measurements were carried out of four Froude numbers of 0.266, 0.313, 0350 and 0.400. A numerical method has been employed to calculate the boundary layer characteristics along the streamlines on the hull which were obtained by using Guilloton's method. The wave-resistance coefficients of the ship form have been calculated by the Michell integral, using the Michell thin ship centerplane distribution, a hull surface distribution and a slender-body centerplane distribution. These calculations have been carried out only to first order and have been compared with the residuary resistance and the wave profile resistance.
Download or read book Handbook of Wind Energy Aerodynamics written by Bernhard Stoevesandt and published by Springer Nature. This book was released on 2022-08-04 with total page 1495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook provides both a comprehensive overview and deep insights on the state-of-the-art methods used in wind turbine aerodynamics, as well as their advantages and limits. The focus of this work is specifically on wind turbines, where the aerodynamics are different from that of other fields due to the turbulent wind fields they face and the resultant differences in structural requirements. It gives a complete picture of research in the field, taking into account the different approaches which are applied. This book would be useful to professionals, academics, researchers and students working in the field.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Twenty First Symposium on Naval Hydrodynamics written by National Research Council and published by National Academies Press. This book was released on 1997-09-11 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions of the American Society of Mechanical Engineers written by American Society of Mechanical Engineers and published by . This book was released on 1962 with total page 1436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 2, 4-11, 62-68 include the Society's Membership list; v. 55-80 include the Journal of applied mechanics (also issued separately) as contributions from the Society's Applied Mechanics Division.
Download or read book An Experimental Investigation of the Flow Structure of the Turbulent Boundary Layer written by Peter W. Runstadler and published by . This book was released on 1963 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 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).
