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Three Dimensional Flow In Cavity At Yaw
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Book Synopsis Three-dimensional Flow in Cavity at Yaw by : Alex Povitsky
Download or read book Three-dimensional Flow in Cavity at Yaw written by Alex Povitsky and published by . This book was released on 2001 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is motivated by three-dimensional flows about protrusions and cavities with an arbitrary angle between the external flow and rigid elements. The novel type of a "building block" cavity flow is proposed where the cavity lid moves along its diagonal (Case A). The proposed case is taken as a typical representative of essentially three-dimensional highly separated vortical flows having simple single-block rectangular geometry of computational domain. Computational results are compared to the previous studies where the lid moves parallel to the cavity side walls (Case B). These 3-D lid-driven cavity flows are studied by numerical modeling using second-order upwind schemes for convective terms. The volume and plane integrals of primary and transversal momentum are introduced to compare cases in a quantitative way. For the laminar flow in the cubic cavity, the integral momentum of the secondary flow (which is perpendicular to the lid direction) is about an order of magnitude larger than that in Case B. In Case A, the number of secondary vortices substantially depends on the Re number. The secondary vortices in the central part of the cavity in Case A distinguishes it from Case B, where only corner secondary vortices appear. For a rectangular 3-D 3: 1 : 1 cavity the integral momentum of the secondary flow in Case A is an order of magnitude larger than that in the benchmark cases. The flow field in Case A includes a curvilinear separation line and non-symmetrical vortices which are discussed in the paper. The estimated Goertler number is approximately 4.5 times larger in Case A than that in Case B for the same Re number. This indicates that in Case A the flow becomes unsteady for smaller Re numbers than in Case B. For developed turbulent flow in the cubic cavity, the yaw effect on amplifcation of secondary flow is as strong as that for the laminar flow despite the more complex vortical flow pattern in benchmark case B.
Book Synopsis Experimental and Numerical Study of Flow Structures Associated with Low Aspect Ratio Elliptical Cavities by : Taravat Khadivi
Download or read book Experimental and Numerical Study of Flow Structures Associated with Low Aspect Ratio Elliptical Cavities written by Taravat Khadivi and published by . This book was released on 2012 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flow regimes associated with a 2:1 aspect ratio, elliptical planform cavity in a turbulent flat plate boundary layer have been systematically examined for various depth/width ratios (0.1 to 1.0) and yaw angles (0° to 90°), using a combination of wind tunnel experiments (involving Particle Image Velocimetry and helium bubble visualization) and Computational Fluid Dynamics (CFD) simulations (employing three- dimensional steady calculations with the Reynolds Stress model turbulence closure). Satisfactory agreement has been found between the results using the two methods, indicating that the steady numerical simulations can be a cost-effective tool to predict the mean flow features. The flow has been found to be highly dependent on yaw angle and cavity depth. For each of the three broad flow categories specified according to yaw angle, which include the symmetric flow regime (yaw angle = 0°), the straight vortex regime (yaw angle = 90°) and the asymmetric flow regime (15° ≤ yaw angle ≤ 60°) different regimes are found to exist, depending on cavity depth. For each combination of yaw angle and depth, the flow has been analyzed through investigation of shear layer parameters, the three-dimensional vortex structure, pressure distribution and drag, wake flow, and vortex oscillations. While the elliptical cavity flows have been found to have some similarities with those of nominally two-dimensional and rectangular cavities, the three-dimensional effects due to the low aspect ratio and curvature of the walls give rise to features exclusive to low aspect ratio elliptical cavities, including formation of cellular structures at intermediate depths and unique vortex structures within and downstream of the cavity. The three-dimensional flow structure of the flow is most pronounced in the asymmetric regimes with large yaw angles (45° and 60°). The dominant feature in this regime is the formation of a trailing vortex that is associated with high drag and flow oscillations within the cavity.
Book Synopsis Incompressible Flow Over a Three-dimensional Cavity by : H. Yao
Download or read book Incompressible Flow Over a Three-dimensional Cavity written by H. Yao and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Investigation of the Three Dimensional Flow in Cavities by : Douglas Daniel McKiernan
Download or read book Experimental and Numerical Investigation of the Three Dimensional Flow in Cavities written by Douglas Daniel McKiernan and published by . This book was released on 1996 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Three-dimensional Cavity Flow Fields at Subsonic and Transonic Speeds by : Elizabeth B. Plentovich
Download or read book Three-dimensional Cavity Flow Fields at Subsonic and Transonic Speeds written by Elizabeth B. Plentovich and published by . This book was released on 1990 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Calculation of Three Dimensional Cavity Flow Fields by : J.J. Gorski
Download or read book Calculation of Three Dimensional Cavity Flow Fields written by J.J. Gorski and published by . This book was released on 1987 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulations of Flow in a Three-dimensional Cavity-channel Geometry by :
Download or read book Numerical Simulations of Flow in a Three-dimensional Cavity-channel Geometry written by and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The computational fluid dynamics code FIDAP (Fluid Dynamics International) is used to perform simulations of the steady laminar flow of an incompressible fluid in a three-dimensional rectangular cavity. Although most previous studies have considered a ''lid- driven'' cavity, where a uniform horizontal velocity is imposed on the cavity lid, the flow in the channel above the cavity is explicitly included in the computational domain in these simulations. Simulations are performed for various Reynolds numbers in the range 0 (less-than or equal to) Re (less-than or equal to) 1000 and are compared to corresponding two-dimensional results. The three-dimensional flow are seen to exhibit a topological complexity not present in the two-dimensional results, including a change in topology around Re (almost equal to) 35.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Characterization of Cavity Flow Fields Using Pressure Data Obtained in the Langley 0.3-Meter Transonic Cryogenic Tunnel by : Maureen B. Tracy
Download or read book Characterization of Cavity Flow Fields Using Pressure Data Obtained in the Langley 0.3-Meter Transonic Cryogenic Tunnel written by Maureen B. Tracy and published by . This book was released on 1993 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ICASE Semiannual Report written by and published by . This book was released on 2002 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes research conducted at ICASE in applied mathematics, computer science, fluid mechanics, and structures and material sciences during the period October 1, 2000 through March 31, 2001.
Book Synopsis Three-dimensional Flow and Temperature Distribution in Rectangular Cavities by : Junichi Suzuki
Download or read book Three-dimensional Flow and Temperature Distribution in Rectangular Cavities written by Junichi Suzuki and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Ernst Heinrich Hirschel Publisher :Springer Science & Business Media ISBN 13 :3642413781 Total Pages :396 pages Book Rating :4.6/5 (424 download)
Book Synopsis Three-Dimensional Attached Viscous Flow by : Ernst Heinrich Hirschel
Download or read book Three-Dimensional Attached Viscous Flow written by Ernst Heinrich Hirschel and published by Springer Science & Business Media. This book was released on 2013-10-29 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Viscous flow is treated usually in the frame of boundary-layer theory and as two-dimensional flow. Books on boundary layers give at most the describing equations for three-dimensional boundary layers, and solutions often only for some special cases. This book provides basic principles and theoretical foundations regarding three-dimensional attached viscous flow. Emphasis is put on general three-dimensional attached viscous flows and not on three-dimensional boundary layers. This wider scope is necessary in view of the theoretical and practical problems to be mastered in practice. The topics are weak, strong, and global interaction, the locality principle, properties of three-dimensional viscous flow, thermal surface effects, characteristic properties, wall compatibility conditions, connections between inviscid and viscous flow, flow topology, quasi-one- and two-dimensional flows, laminar-turbulent transition and turbulence. Though the primary flight speed range is that of civil air transport vehicles, flows past other flying vehicles up to hypersonic speeds are also considered. Emphasis is put on general three-dimensional attached viscous flows and not on three-dimensional boundary layers, as this wider scope is necessary in view of the theoretical and practical problems that have to be overcome in practice. The specific topics covered include weak, strong, and global interaction; the locality principle; properties of three-dimensional viscous flows; thermal surface effects; characteristic properties; wall compatibility conditions; connections between inviscid and viscous flows; flow topology; quasi-one- and two-dimensional flows; laminar-turbulent transition; and turbulence. Detailed discussions of examples illustrate these topics and the relevant phenomena encountered in three-dimensional viscous flows. The full governing equations, reference-temperature relations for qualitative considerations and estimations of flow properties, and coordinates for fuselages and wings are also provided. Sample problems with solutions allow readers to test their understanding.
Book Synopsis Mechanical and Aerospace Engineering, ICMAE2011 by : Wu Fan
Download or read book Mechanical and Aerospace Engineering, ICMAE2011 written by Wu Fan and published by Trans Tech Publications Ltd. This book was released on 2011-10-24 with total page 5850 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters CPCI-S (WoS). These proceedings comprise fully-refereed papers presented at the conference. The main conference theme was Mechanical and Aerospace Engineering, and the main goal of the event was to provide an international scientific forum for the exchange of new ideas in a number of fields and for in-depth discussions with peers from around the world. Core areas of mechanical and aerospace engineering are covered, together with multidisciplinary, interdisciplinary research and applications; thus making the work an excellent guide to those topics.
Book Synopsis Molecular Study of Turbulence in Three Dimensional Cavity Flow by : Donald Greenspan
Download or read book Molecular Study of Turbulence in Three Dimensional Cavity Flow written by Donald Greenspan and published by . This book was released on 2000 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of Three Dimensional Modes in Perdiodically Driven Cavity Flow by : Jonathan J. F. Leung
Download or read book An Experimental Investigation of Three Dimensional Modes in Perdiodically Driven Cavity Flow written by Jonathan J. F. Leung and published by . This book was released on 2004 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Yaw Angle and Reynolds Number on Rectangular-box Cavities at Subsonic and Transonic Speeds by : Elizabeth B. Plentovich
Download or read book Effects of Yaw Angle and Reynolds Number on Rectangular-box Cavities at Subsonic and Transonic Speeds written by Elizabeth B. Plentovich and published by . This book was released on 1991 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computations of Three-dimensional Unstrady Suspersonic Cavity Flow to Study the Effect of Different Downstream Geometries by : B. I. Soemarwoto
Download or read book Computations of Three-dimensional Unstrady Suspersonic Cavity Flow to Study the Effect of Different Downstream Geometries written by B. I. Soemarwoto and published by . This book was released on 2001 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
