Rotational and irrotational freestream disturbances interacting inviscidly with a semiinfinite plate
Abstract
This report is part of a search for all possible classes of linear disturbances that can arise in a flowfield and thus serve as descriptive elements for a general disturbance flowfield. This report examines the velocity and pressure fields of disturbances that exist in a full twodimensional unsteady incompressible inviscid flowfield about a semiinfinite flat plate. The permissible classes of disturbances include rotational as well as irrotational disturbances. Because of the linearity of the treatment, superpositions of these are also included. In general, the disturbances do not vanish far from the plate and in some instances are unbounded at infinite distances from the plate. These unbounded disturbances are retained, since they are relevant to applications involving finite domains, for example, in wind tunnels. In this elliptic problem, the semiinfinite plate exerts an irrotational upstream influence which is composed of a pattern of standing waves. Downstream of the leading edge, the flowfield is also altered by an irrotational flow, but this irrotational flow is composed of both standing and traveling waves.
 Publication:

Final Report
 Pub Date:
 April 1983
 Bibcode:
 1983urc..reptQ....R
 Keywords:

 Flat Plates;
 Flow Distribution;
 Free Flow;
 Inviscid Flow;
 Leading Edges;
 Rotation;
 Standing Waves;
 Traveling Waves;
 Aerodynamics;
 Boundary Layers;
 Flow Velocity;
 Numerical Analysis;
 Permeability;
 Pressure Distribution;
 Unsteady Flow;
 Vortices;
 Fluid Mechanics and Heat Transfer