Three-Dimensional Attached Viscous Flow

Three-Dimensional Attached Viscous Flow

PDF Three-Dimensional Attached Viscous Flow Download

  • Author: Ernst Heinrich Hirschel
  • Publisher: Springer Science & Business Media
  • ISBN: 3642413781
  • Category : Technology & Engineering
  • Languages : en
  • Pages : 391

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.


Basics of Aerothermodynamics

Basics of Aerothermodynamics

PDF Basics of Aerothermodynamics Download

  • Author: Ernst Heinrich Hirschel
  • Publisher: Springer Science & Business Media
  • ISBN: 3540265198
  • Category : Technology & Engineering
  • Languages : en
  • Pages : 413

The last two decades have brought two important developments for aeroth- modynamics. One is that airbreathing hypersonic flight became the topic of technology programmes and extended system studies. The other is the emergence and maturing of the discrete numerical methods of aerodyn- ics/aerothermodynamics complementary to the ground-simulation facilities, with the parallel enormous growth of computer power. Airbreathing hypersonic flight vehicles are, in contrast to aeroassisted re-entry vehicles, drag sensitive. They have, further, highly integrated lift and propulsion systems. This means that viscous eflFects, like boundary-layer development, laminar-turbulent transition, to a certain degree also strong interaction phenomena, are much more important for such vehicles than for re-entry vehicles. This holds also for the thermal state of the surface and thermal surface effects, concerning viscous and thermo-chemical phenomena (more important for re-entry vehicles) at and near the wall. The discrete numerical methods of aerodynamics/aerothermodynamics permit now - what was twenty years ago not imaginable - the simulation of high speed flows past real flight vehicle configurations with thermo-chemical and viscous effects, the description of the latter being still handicapped by in sufficient flow-physics models. The benefits of numerical simulation for flight vehicle design are enormous: much improved aerodynamic shape definition and optimization, provision of accurate and reliable aerodynamic data, and highly accurate determination of thermal and mechanical loads. Truly mul- disciplinary design and optimization methods regarding the layout of thermal protection systems, all kinds of aero-servoelasticity problems of the airframe, et cetera, begin now to emerge.


Calculation of Three Dimensional Attached Viscous Flow on General Configurations Using Second-order Boundary-layer Theory

Calculation of Three Dimensional Attached Viscous Flow on General Configurations Using Second-order Boundary-layer Theory

PDF Calculation of Three Dimensional Attached Viscous Flow on General Configurations Using Second-order Boundary-layer Theory Download

  • Author: F. Monnoyer de Galland
  • Publisher:
  • ISBN:
  • Category :
  • Languages : en
  • Pages : 45


Three-Dimensional Flow in the Root Region of Wind Turbine Rotors

Three-Dimensional Flow in the Root Region of Wind Turbine Rotors

PDF Three-Dimensional Flow in the Root Region of Wind Turbine Rotors Download

  • Author: Galih Bangga
  • Publisher: kassel university press GmbH
  • ISBN: 373760536X
  • Category :
  • Languages : en
  • Pages : 182

This book presents the state of the art in the analyses of three-dimensional flow over rotating wind turbine blades. Systematic studies for wind turbine rotors with different sizes were carried out numerically employing three different simulation approaches, namely the Euler, URANS and DDES methods. The main mechanisms of the lift augmentation in the blade inboard region are described in detail. The physical relations between the inviscid and viscous effects are presented and evaluated, emphasizing the influence of the flow curvature on the resulting pressure distributions. Detailed studies concerning the lift augmentation for large wind turbine rotors are considered as thick inboard airfoils characterized by massive separation are desired to stronger contribute to power production. Special attention is given to the analyses of wind turbine loads and flow field that can be helpful for the interpretation of the occurring physical phenomena. The book is aimed at students, researchers, engineers and physicists dealing with wind engineering problems, but also for a wider audience involved in flow computations.


Separated and Vortical Flow in Aircraft Wing Aerodynamics

Separated and Vortical Flow in Aircraft Wing Aerodynamics

PDF Separated and Vortical Flow in Aircraft Wing Aerodynamics Download

  • Author: Ernst Heinrich Hirschel
  • Publisher: Springer Nature
  • ISBN: 366261328X
  • Category : Technology & Engineering
  • Languages : en
  • Pages : 456

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 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.


Symposium Transsonicum III

Symposium Transsonicum III

PDF Symposium Transsonicum III Download

  • Author: Jürgen Zierep
  • Publisher: Springer Science & Business Media
  • ISBN: 3642835848
  • Category : Science
  • Languages : en
  • Pages : 504

Continuing the tradition of the IUTAM Symposia TRANSSONICA, this review of the numerical simulation and physical modelling of transonic flows presents new developments in the fields of computational and experimental aerodynamics. A major topic of the symposium proceedings is the evaluation of present numerical analysis techniques with respect to transonic aerodynamics. In the field of experimental aerodynamics, the high Reynolds number effect and the interference-free testing in transonic wind tunnels are of special interest.


Advances in Hypersonics

Advances in Hypersonics

PDF Advances in Hypersonics Download

  • Author: BERTIN
  • Publisher: Springer Science & Business Media
  • ISBN: 1461203759
  • Category : Technology & Engineering
  • Languages : en
  • Pages : 427

These three volumes entitled Advances in Hypersonics contain the Proceedings of the Second and Third Joint US/Europe Short Course in Hypersonics which took place in Colorado Springs and Aachen. The Second Course was organized at the US Air Force Academy, USA in January 1989 and the Third Course at Aachen, Germany in October 1990. The main idea of these Courses was to present to chemists, com puter scientists, engineers, experimentalists, mathematicians, and physicists state of the art lectures in scientific and technical dis ciplines including mathematical modeling, computational methods, and experimental measurements necessary to define the aerothermo dynamic environments for space vehicles such as the US Orbiter or the European Hermes flying at hypersonic speeds. The subjects can be grouped into the following areas: Phys ical environments, configuration requirements, propulsion systems (including airbreathing systems), experimental methods for external and internal flow, theoretical and numerical methods. Since hyper sonic flight requires highly integrated systems, the Short Courses not only aimed to give in-depth analysis of hypersonic research and technology but also tried to broaden the view of attendees to give them the ability to understand the complex problem of hypersonic flight. Most of the participants in the Short Courses prepared a docu ment based on their presentation for reproduction in the three vol umes. Some authors spent considerable time and energy going well beyond their oral presentation to provide a quality assessment of the state of the art in their area of expertise as of 1989 and 1991.


Boundary Element Methods in Nonlinear Fluid Dynamics

Boundary Element Methods in Nonlinear Fluid Dynamics

PDF Boundary Element Methods in Nonlinear Fluid Dynamics Download

  • Author: P.K. Banerjee
  • Publisher: CRC Press
  • ISBN: 1482296551
  • Category : Science
  • Languages : en
  • Pages : 368

This volume demonstrates that boundary element methods are both elegant and efficient in their application to time dependent time harmonic problems in engineering and therefore worthy of considerable development.


Boundary-Layer Theory

Boundary-Layer Theory

PDF Boundary-Layer Theory Download

  • Author: Hermann Schlichting (Deceased)
  • Publisher: Springer
  • ISBN: 366252919X
  • Category : Technology & Engineering
  • Languages : en
  • Pages : 805

This new edition of the near-legendary textbook by Schlichting and revised by Gersten presents a comprehensive overview of boundary-layer theory and its application to all areas of fluid mechanics, with particular emphasis on the flow past bodies (e.g. aircraft aerodynamics). The new edition features an updated reference list and over 100 additional changes throughout the book, reflecting the latest advances on the subject.


NASA Technical Paper

NASA Technical Paper

PDF NASA Technical Paper Download

  • Author: United States. National Aeronautics and Space Administration
  • Publisher:
  • ISBN:
  • Category : Aeronautics
  • Languages : en
  • Pages :