Study of Thick Boundary Layers Near the Tail of Bodies of Revolution PDF Download
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Author: V. C. Patel
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
The research carried out under this contract can be divided into three main sections, namely (1) an experimental study of the thick, turbulent boundary-layer near the tail of a body of revolution, (2) methods of calculating the thick, axisymmetric, turbulent boundary-layer and its interaction with the potential flow, and (3) calculation of the viscous resistance of bodies of revolution at zero incidence. The progress made in each of these areas is reviewed.
Author: V. C. Patel
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
The research carried out under this contract can be divided into three main sections, namely (1) an experimental study of the thick, turbulent boundary-layer near the tail of a body of revolution, (2) methods of calculating the thick, axisymmetric, turbulent boundary-layer and its interaction with the potential flow, and (3) calculation of the viscous resistance of bodies of revolution at zero incidence. The progress made in each of these areas is reviewed.
Author: V. C. Patel
Publisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 70
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Book Description
Detailed measurements of pressure distributions, mean velocity profiles and Reynolds stresses were made in the thick incompressible axisymmetric turbulent boundary layer near the tail of a body of revolution. The results indicate a number of important differences between the behavior of a thick and a thin boundary layer. Significant variations of static pressure and a low level of turbulence are noted. Thus in order to predict the behavior of the flow in the tail region of a body of revolution it does not appear possible to use conventional thin-boundary-layer calculation procedures. (Author Modified Abstract).
Author: Kanwar Sain Satija
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 222
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 748
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Book Description
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.
Author: Virendrakumar Chaturbhai Patel
Publisher:
ISBN:
Category : Turbulent boundary layer
Languages : en
Pages : 150
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Book Description
Detailed measurements of pressure distributions, mean velocity profiles and Reynolds stresses were made in the thick, axisymmetric boundary layer and the near wake of a low-drag body of revolution. The data are presented in graphical as well as tabular form for convenience in later analysis. These measurements shed some light on the joint influence of transverse and longitudinal surface curvatures and pressure gradients on the boundary-layer development and on the manner in which an axisymmetric boundary layer becomes a fully-developed wake. Apart from giving a complete set of data on such an important flow configuration, the measurements should provide a fairly rigorous test case for some of the recent turbulence closure models which claim a level of generality not achieved by the older phenomenological models. By inclusion of recently proposed modifications to account for the effects of the extra rates of strain on the turbulence length scale arising from longitudinal and transverse surface curvatures, it is shown that the boundary layer in the tail region of a body of revolution is dominated by the extra strain rates and that more research is needed to account for them properly even in the most recent calculation procedures.
Author: V. C. Patel
Publisher:
ISBN:
Category : Turbulent boundary layer
Languages : en
Pages : 22
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Author: Pauline H. Gurewitz
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 364
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Author: A. Nakayama
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 50
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Book Description
The flow in the tail region of a body of revolution is a complex one since there the boundary layer often grows to a thickness many times the local radius of the body and there results a strong interaction between the boundary layer and the external potential flow. The influence of making simplifying assumptions concerning the flow in this region in conventional drag-calculation methods is discussed, and assessed by incorporating a method which takes into account the effects of the thick axisymmetric boundary-layer near the tail in an approximate manner. It is shown that this modification leads to a drag-calculation method which gives consistently accurate prediction of the viscous resistance of a wide variety of bodies of revolution. (Author).
Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 838
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Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 384
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