NDLI: Leading-edge receptivity to a vortical freestream disturbance: a numerical analysis

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Leading-edge receptivity to a vortical freestream disturbance: a numerical analysis

Content Provider	NASA Technical Reports Server (NTRS)
Author	Reed, Helen L. Buter, Thomas A.
Copyright Year	1991
Description	The receptivity to freestream vorticity of the boundary layer over a flat plate with an elliptic leading edge is investigated numerically. The flow is simulated by solving the incompressible Navier-Stokes system in general curvilinear coordinates with the vorticity and stream function as dependent variables. A finite-difference scheme which is second-order accurate in both space and time is used. As a first step, the steady basic-state solution is computed. Then a small amplitude vortical disturbance is introduced at the upstream boundary and the governing equations are solved time-accurately to evaluate the spatial and temporal growth of the perturbations leading to instability waves (Tollmien-Schlichting waves) inside the boundary layer. Preliminary results for a symmetric, 2-D disturbance reveal the presence of Tollmien-Schlichting waves aft of the flat-plate/ellipse juncture.
File Size	814036
Page Count	23
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19920005753
Archival Resource Key	ark:/13960/t21c6wk7g
Language	English
Publisher Date	1991-12-01
Access Restriction	Open
Subject Keyword	Aerodynamics Flat Plates Perturbation Boundary Layer Control Spherical Coordinates Navier-stokes Equation Incompressible Flow Numerical Analysis Finite Difference Theory Vorticity Tollmien-schlichting Waves Boundary Layer Stability Free Flow Leading Edges Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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