NDLI: An experimental investigation of turbulent boundary layers along curved surfaces

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An experimental investigation of turbulent boundary layers along curved surfaces

Content Provider	NASA Technical Reports Server (NTRS)
Author	So, R. M. C. Mellor, G. L.
Copyright Year	1972
Description	A curved wall tunnel was designed, and an equilibrium turbulent boundary layer was set up on the straight section preceding the curved test section. Turbulent boundary layer flows with uniform and adverse pressure distributions along convex and concave walls were investigated. Hot-wire measurements along the convex surface indicated that turbulent mixing between fluid layers was very much reduced. However, the law of the wall held and the skin friction, thus determined, correlated well with other measurements. Hot-wire measurements along the concave test wall revealed a system of longitudinal vortices inside the boundary layer and confirmed that concave curvature enhances mixing. A self-consistent set of turbulent boundary layer equations for flows along curved surfaces was derived together with a modified eddy viscosity. Solution of these equations together with the modified eddy viscosity gave results that correlated well with the present data on flows along the convex surface with arbitrary pressure distribution. However, it could only be used to predict the mean characteristics of the flow along concave walls because of the existence of the system of longitudinal vortices inside the boundary layer.
File Size	8212011
Page Count	276
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19720014689
Archival Resource Key	ark:/13960/t5n92121q
Language	English
Publisher Date	1972-04-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics Flow Equations Skin Friction Wall Flow Turbulent Boundary Layer Flow Visualization Pressure Distribution Boundary Layer Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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