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Record Nr. |
UNINA9910484735203321 |
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Autore |
Rizzi Arthur |
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Titolo |
Separated and vortical flow in aircraft wing aerodynamics : basic principles and unit problems / / Arthur Rizzi [et al.] |
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Pubbl/distr/stampa |
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Berlin, Germany : , : Springer, , [2021] |
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©2021 |
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ISBN |
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Edizione |
[1st edition 2021.] |
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Descrizione fisica |
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1 online resource (XV, 456 p.) : 285 illus., 111 illus. in color |
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Disciplina |
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Soggetti |
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Engineering - Fluid Dynamics |
Computational intelligence |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Nota di contenuto |
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Introduction -- Separation: Some Relevant Boundary-Layer Properties, Interaction Issues, and Drag -- Elements of Vortex Theory -- The Local Vorticity Content of a Shear Layer -- The Matter of Discrete Euler Solutions for Lifting Wings -- About the Kutta Condition -- Topology of Skin-Friction and Velocity Fields -- Large Aspect-Ratio Wing Flow -- Particular Flow Problems of Large Aspect-Ratio Wings -- Small Aspect-Ratio Delta-Type Wing Flow -- Selected Flow Problems of Small Aspect-Ratio Delta-Type Wings -- Solutions of the Problems. |
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Sommario/riassunto |
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Fluid mechanical aspects of separated and vortical flow in aircraft wing aerodynamics are treated. The focus is on two wing classes: (1) large aspect-ratio wings and (2) small aspect-ratio delta-type wings. Aerodynamic design issues in general are not dealt with. Discrete numerical simulation methods play a progressively larger role in aircraft design and development. Accordingly, in the introduction to the book the different mathematical models are considered, which underlie the aerodynamic computation methods (panel methods, RANS and scale-resolving methods). Special methods are the Euler methods, which as rather inexpensive methods embrace compressibility effects and also permit to describe lifting-wing flow. The concept of the kinematically active and inactive vorticity content of shear layers gives insight into many flow phenomena, but also, with the second break of |
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symmetry---the first one is due to the Kutta condition---an explanation of lifting-wing flow fields. The prerequisite is an extended definition of separation: “flow-off separation” at sharp trailing edges of class (1) wings and at sharp leading edges of class (2) wings. The vorticity-content concept, with a compatibility condition for flow-off separation at sharp edges, permits to understand the properties of the evolving trailing vortex layer and the resulting pair of trailing vortices of class (1) wings. The concept also shows that Euler methods at sharp delta or strake leading edges of class (2) wings can give reliable results. Three main topics are treated: 1) Basic Principles are considered first: boundary-layer flow, vortex theory, the vorticity content of shear layers, Euler solutions for lifting wings, the Kutta condition in reality and the topology of skin-friction and velocity fields. 2) Unit Problems treat isolated flow phenomena of the two wing classes. Capabilities of panel and Euler methods are investigated. One Unit Problem is the flow past the wing of the NASA Common Research Model. Other Unit Problems concern the lee-side vortex system appearing at the Vortex-Flow Experiment 1 and 2 sharp- and blunt-edged delta configurations, at a delta wing with partly round leading edges, and also at the Blunt Delta Wing at hypersonic speed. 3) Selected Flow Problems of the two wing classes. In short sections practical design problems are discussed. The treatment of flow past fuselages, although desirable, was not possible in the frame of this book. |
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2. |
Record Nr. |
UNINA9910783734103321 |
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Autore |
Aldhouse-Green Miranda J (Miranda Jane) |
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Titolo |
An archaeology of images [[electronic resource] ] : iconology and cosmology in Iron Age and Roman Europe / / Miranda Aldhouse-Green |
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Pubbl/distr/stampa |
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London ; ; New York, : Routledge, 2004 |
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ISBN |
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1-134-52776-4 |
0-203-68666-7 |
1-280-05278-3 |
0-203-64745-9 |
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Descrizione fisica |
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1 online resource (302 p.) |
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Classificazione |
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Disciplina |
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Soggetti |
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Art, Celtic |
Symbolism in art |
Iron age - Europe |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references (p. 242-273) and index. |
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Nota di contenuto |
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Book Cover; Title; Contents; List of figures; Preface; Acknowledgements; Introduction: images in action; Image and identity: personhood, self and other; Imaging gender: iconographies of difference; Materiality and meaning; Thinking with beasts; Dreaming monsters and shamanic shape-shifters; Paths of perception: ways of seeing, ways of telling; Resistant iconographies: post-colonial perspectives; Postscript: images unlocked?; References; Index |
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Sommario/riassunto |
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Using archaeology and social anthropology, and more than 100 original line drawings and photographs, An Archaeology of Images takes a fresh look at how ancient images of both people and animals were used in the Iron Age and Roman societies of Europe, 600 BC to AD 400 and investigates the various meanings with which images may have been imbued.The book challenges the usual interpretation of statues, reliefs and figurines as passive things to be looked at or worshipped, and reveals them instead as active artefacts designed to be used, handled and broken. It is made clear that the placi |
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