Lecture Series Boundary Layer Theory Part I
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Lecture Series Boundary Layer Theory Part I
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Author : Nasa Technical Reports Server (Ntrs)
language : en
Publisher: BiblioGov
Release Date : 2013-08
Lecture Series Boundary Layer Theory Part I written by Nasa Technical Reports Server (Ntrs) and has been published by BiblioGov this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-08 with categories.
In the lecture series starting today author want to give a survey of a field of aerodynamics which has for a number of years been attracting an ever growing interest. The subject is the theory of flows with friction, and, within that field, particularly the theory of friction layers, or boundary layers. A great many considerations of aerodynamics are based on the ideal fluid, that is the frictionless incompressibility and fluid. By neglect of compressibility and friction the extensive mathematical theory of the ideal fluid, (potential theory) has been made possible. Actual liquids and gases satisfy the condition of incomressibility rather well if the velocities are not extremely high or, more accurately, if they are small in comparison with sonic velocity. For air, for instance, the change in volume due to compressibility amounts to about 1 percent for a velocity of 60 meters per second. The hypothesis of absence of friction is not satisfied by any actual fluid; however, it is true that most technically important fluids, for instance air and water, have a very small friction coefficient and therefore behave in many cases almost like the ideal frictionless fluid. Many flow phenomena, in particular most cases of lift, can be treated satisfactorily, - that is, the calculations are in good agreement with the test results, -under the assumption of frictionless fluid. However, the calculations with frictionless flow show a very serious deficiency; namely, the fact, known as d'Alembert's paradox, that in frictionless flow each body has zero drag whereas in actual flow each body experiences a drag of greater or smaller magnitude. For a long time the theory has been unable to bridge this gap between the theory of frictionless flow and the experimental findings about actual flow. The cause of this fundamental discrepancy is the viscosity which is neglected in the theory of ideal fluid; however, in spite of its extraordinary smallness it is decisive for the course of the flow
Lecture Series Boundary Layer Theory
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Author : H. Schlichting
language : en
Publisher:
Release Date : 1949
Lecture Series Boundary Layer Theory written by H. Schlichting and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1949 with Aerodynamics categories.
The subject of turbulent flow is treated in detail. The available data on flow through pipes and over flat plates are presented. Turbulent wakes and jets are treated by means of the Prandtl mixing length theory. A section is devoted to the Gruschwitz method for calculating turbulent boundary layers in accelerated and retarded flows. The methods of Betz and Jones for determining profile drag from wake surveys are given. A chapter on the theory of the stability of the laminar boundary layer, developed from the point of view of small oscillations, is also included.
Lecture Series Boundary Layer Theory Part 1 Laminar Flows
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Author :
language : en
Publisher:
Release Date : 1949
Lecture Series Boundary Layer Theory Part 1 Laminar Flows written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1949 with categories.
Technical Memorandum
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Author :
language : en
Publisher:
Release Date : 1949
Technical Memorandum written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1949 with Aeronautics categories.
Chiefly translations from foreign aeronautical journals.
Technical Note National Advisory Committee For Aeronautics
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Author : United States. National Advisory Committee for Aeronautics
language : en
Publisher:
Release Date : 1958
Technical Note National Advisory Committee For Aeronautics written by United States. National Advisory Committee for Aeronautics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with Aeronautics categories.
Technical Memorandum National Advisory Committee For Aeronautics
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Author : United States. National Advisory Committee for Aeronautics
language : en
Publisher:
Release Date : 1949
Technical Memorandum National Advisory Committee For Aeronautics written by United States. National Advisory Committee for Aeronautics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1949 with Aeronautics categories.
Chiefly translations from foreign aeronautical journals.
Development Of Spoiler Controls For Remote Control Of Flying Missiles
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Author : G. Ernst
language : en
Publisher:
Release Date : 1949
Development Of Spoiler Controls For Remote Control Of Flying Missiles written by G. Ernst and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1949 with Ailerons categories.
The present report deals with the aerodynamic, constructive, and instrumental development of a spoiler control for remote control of flying missiles.
Technical Memorandums
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Author : United States. National Advisory Committee for Aeronautics
language : en
Publisher:
Release Date : 1949
Technical Memorandums written by United States. National Advisory Committee for Aeronautics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1949 with Aeronautics categories.
Chiefly translations from foreign aeronautical journals.
Triangular Flume Study Of Distortion Effects
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Author : Waterways Experiment Station (U.S.)
language : en
Publisher:
Release Date : 1957
Triangular Flume Study Of Distortion Effects written by Waterways Experiment Station (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with Hydraulic models categories.
A Selected Listing Of Nasa Scientific And Technical Reports For
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Author :
language : en
Publisher:
Release Date : 1949
A Selected Listing Of Nasa Scientific And Technical Reports For written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1949 with Aeronautics categories.