An Experimental Investigation of Three-dimensional Boundary Layer Separation in Supersonic Flow Past a Circular Cylinder on a Flat Plate
Title | An Experimental Investigation of Three-dimensional Boundary Layer Separation in Supersonic Flow Past a Circular Cylinder on a Flat Plate PDF eBook |
Author | Oktay Ozcan |
Publisher | |
Pages | 116 |
Release | 1982 |
Genre | Boundary layer |
ISBN |
Scientific and Technical Aerospace Reports
Title | Scientific and Technical Aerospace Reports PDF eBook |
Author | |
Publisher | |
Pages | 456 |
Release | 1995 |
Genre | Aeronautics |
ISBN |
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.
Characterization of the Flowfield Near a Wrap-Around Fin at Supersonic Speeds
Title | Characterization of the Flowfield Near a Wrap-Around Fin at Supersonic Speeds PDF eBook |
Author | Carl P. Tilmann |
Publisher | |
Pages | 166 |
Release | 1998 |
Genre | Technology & Engineering |
ISBN |
A wall-mounted semi-cylindrical model fitted with a single wrap- around in (WAF) has been investigated numerically and experimentally, with the objective of characterizing the mean and turbulent flowfield near a WAF in a supersonic flowfield. Numerical and experimental results are used to determine the nature of the flowfield and quantify the effects of fin curvature on the character of the flow near WAFs. This research has been motivated by the need to identify possible sources of a high-speed rolling moment reversal observed in sub-scale flight tests. Detailed mean flow and turbulence measurements were obtained in the AFIT Mach 3 wind tunnel using conventional probes and cross-wire hot-film anemometry at a series of stations upstream of and aft of the fin shock/boundary layer interaction. Hot-film anemometry results showed the turbulence intensity and Reynolds shear stress in the fuselage boundary layer to be far greater on the concave side of the fin than on the convex side. Mean flow was also obtained in the AFIT Mach 5 wind tunnel using conventional pressure probes. Numerical results were also obtained at the test conditions employing the algebraic eddy viscosity model of Baldwin and Lomax. Correlation with experimental data suggests that the calculations have captured the flow physics involved in this complicated flowfield. The calculations, corroborated by experimental results, indicate that a vortex exists in the fin/body juncture region on the convex side of the fin. This feature is not captured by the oft- used inviscid methods, and can greatly influence the pressure loading on the fin near the root.
Applied Mechanics Reviews
Title | Applied Mechanics Reviews PDF eBook |
Author | |
Publisher | |
Pages | 934 |
Release | 1948 |
Genre | Mechanics, Applied |
ISBN |
Japanese Science and Technology
Title | Japanese Science and Technology PDF eBook |
Author | |
Publisher | |
Pages | 724 |
Release | 1986 |
Genre | Science |
ISBN |
AIAA Journal
Title | AIAA Journal PDF eBook |
Author | American Institute of Aeronautics and Astronautics |
Publisher | |
Pages | 1380 |
Release | 2006 |
Genre | Aeronautics |
ISBN |
Technical Abstract Bulletin
Title | Technical Abstract Bulletin PDF eBook |
Author | |
Publisher | |
Pages | 908 |
Release | |
Genre | Science |
ISBN |