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Receptivity to roughness, acoustic, and vortical disturbances in supersonic boundary layers over swept wings
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Balakumar, Ponnampalam King, Rudolph A. |
| Copyright Year | 2011 |
| Description | The receptivity and interaction of stationary and traveling crossflow instability of three-dimensional supersonic boundary layers over a swept biconvex wing with a blunt leading edge are numerically investigated for a freestream Mach number of 3. The steady and unsteady flow fields are obtained by solving the full Navier-Stokes equations. The receptivity of the boundary layer to surface roughness, freestream acoustic waves, and freestream vorticity waves are numerically investigated. The initial amplitudes of the stationary vortices generated by 1 micron roughness elements is about 2000 times larger than the initial amplitudes of the traveling disturbances generated by vortical disturbances. The interaction of stationary and traveling disturbances was investigated by solving the equations with both surface roughness and vortical disturbances. When the initial amplitudes of the stationary disturbances are large compared to the traveling disturbances, the stationary vortex dominates the perturbation field. When the amplitudes are comparable, the traveling vortex prevails and the stationary vortex is suppressed. |
| File Size | 901825 |
| Page Count | 28 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110013237 |
| Archival Resource Key | ark:/13960/t10p6232c |
| Language | English |
| Publisher Date | 2011-06-27 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Sound Waves Steady Flow Surface Roughness Perturbation Three Dimensional Boundary Layer Supersonic Boundary Layers Navier-stokes Equation Supersonic Speed Swept Wings Flow Distribution Vorticity Blunt Leading Edges Boundary Layers Cross Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
