Accession Number:

AD0263706

Title:

BOUNDARY LAYERS IN THREE DIMENSIONS,

Descriptive Note:

Corporate Author:

ADVISORY GROUP FOR AERONAUTICAL RESEARCH AND DEVELOPMENT PARIS (FRANCE)

Personal Author(s):

Report Date:

1960-04-01

Pagination or Media Count:

52.0

Abstract:

Recent adances in the theory of three-dimensional boundary layers are discussed in three main parts. The first part consists of general considerations. The boundary layer equations for laminar compressible flow, and the corresponding momentum integral equations, are written down, in an orthogonal curvilinear system of co-ordinates. Special forms for streamline and geodesic co-rdinates are also given. Cross-flows are then discussed, and this is followed by an account of an axially symmetric analogy and a compressibility correlation that hold when cross-flows are small. In the second part, the extensive exact solutions of Yohner and Hansen for the boundary layer having similar solutions or combinations of similar solutions, and of Sedney - for the boundary layer on a yawed spinning cone, are described. The third part concerns momentum integral methods in which streamline co-ordinates are employed. Works by Timman and Hall are described, and are contrasted as examples of extensions to three dimensions of the Pohlhausen and the Thwaites approaches respectively. The methods of Zaat and Cooke forliminar boundary layers with small cross-flow are then presented. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE