Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 124
Book Description
A Documentation of a Three-dimensional Shock Separated Turbulent Boundary Layer
A Documentation of Two- and Three-dimensional Shock-separated Turbulent Boundary Layers
Author: Documentation of Two- and Three-dimensional Hypersonic Shock Wave/turbulent Boundary Layer Interaction Flows
Author: Marvin I. KussoyPublisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 32
Book Description
Scientific and Technical Aerospace Reports
Author: Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1644
Book Description
Characterization of the Flowfield Near a Wrap-Around Fin at Supersonic Speeds
Author: Carl P. TilmannPublisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 166
Book Description
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.
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1200
Book Description
NASA Tech Briefs
Author: Investigation of Small Surface Protuberances Upstream of Turbulent Boundary Layer Separation
Author: Robert H. KorkegiPublisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 28
Book Description
A Documentation of Two- And Three-Dimensional Shock-Separated Turbulent Boundary Layers
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722896195
Category :
Languages : en
Pages : 106
Book Description
A shock-related separation of a turbulent boundary layer has been studied and documented. The flow was that of an axisymmetric turbulent boundary layer over a 5.02-cm-diam cylinder that was aligned with the wind tunnel axis. The boundary layer was compressed by a 30 deg half-angle conical flare, with the cone axis inclined at an angle alpha to the cylinder axis. Nominal test conditions were P sub tau equals 1.7 atm and M sub infinity equals 2.85. Measurements were confined to the upper-symmetry, phi equals 0 deg, plane. Data are presented for the cases of alpha equal to 0. 5. and 10 deg and include mean surface pressures, streamwise and normal mean velocities, kinematic turbulent stresses and kinetic energies, as well as reverse-flow intermittencies. All data are given in tabular form; pressures, streamwise velocities, turbulent shear stresses, and kinetic energies are also presented graphically. Brown, J. D. and Brown, J. L. and Kussoy, M. I. Ames Research Center SEPARATED FLOW; SHOCK WAVE INTERACTION; SHOCK WAVES; THREE DIMENSIONAL BOUNDARY LAYER; TURBULENT BOUNDARY LAYER; FLOW VELOCITY; GRAPHS (CHARTS); KINEMATICS; KINETIC ENERGY; PRESSURE; SHEAR STRESS; TABLES (DATA)...