The Effects of Steady, Three-dimensional Perturbations in Boundary Layers PDF Download
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Author: Raymond Sedney
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 56
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Book Description
The primary purpose of this report is to survey the available information mainly experimental, on the subject. Most attention is given to the complex flow field resulting when a 3-D protuberance is introduced into a laminar boundary layer; less can be said about the turbulent case or 2-D protuberances because enough detailed, careful experiments have not been made. There are some features of the induced flow fields common to all speed ranges; applications range from flow in the atmospheric boundary layer to hypersonic vehicle problems. Some attempts to analyze the downstream flow are also summarized.
Author: Raymond Sedney
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 56
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Book Description
The primary purpose of this report is to survey the available information mainly experimental, on the subject. Most attention is given to the complex flow field resulting when a 3-D protuberance is introduced into a laminar boundary layer; less can be said about the turbulent case or 2-D protuberances because enough detailed, careful experiments have not been made. There are some features of the induced flow fields common to all speed ranges; applications range from flow in the atmospheric boundary layer to hypersonic vehicle problems. Some attempts to analyze the downstream flow are also summarized.
Author: Raymond Sedney
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
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Book Description
The study of three-dimensional boundary layers is synonymous with the study of cross flow or streamwise vorticity in the boundary layer. The research is concerned with the initial value problem for the 3-D boundary layer equations. Results are reported on exact solutions for the decay of streamwise vorticity, on a combined oil-flow--optical method of visualizing the surface flow field in the presence of 3D protuberances, and nonuniform behavior of the small crossflow approximation.
Author: Raymond Sedney
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 26
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Book Description
Three-dimensional perturbations on two-dimensional boundary layer flows are considered. First initially induced perturbations are studied and a general solution obtained. Second a specific externally induced perturbation is discussed. In both the streamwise velocity perturbation becomes infinite but the cross flow decays as downstream infinity is approached. This implies that the small cross flow approximation is a singular perturbation. The basis for this lies in the fact that the nature of the equations is changed by the approximation, viz., the zone of dependence property is lost.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1070
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Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 520
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1142
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Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 2088
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Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 2084
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 538
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Author: Pauline H. Gurewitz
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 404
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Book Description
