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Effect of acoustic excitation on stalled flows over an airfoil
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Zaman, K. B. M. Q. |
| Copyright Year | 1990 |
| Description | The effect of acoustic excitation on post-stalled flows over an airfoil, i.e., flows that are fully separated from near the leading edge, is investigated. The excitation results in a tendency towards reattachment, which is accompanied by an increased lift and reduced drag, although the flow may still remain fully separated. It is found that with increasing excitation amplitude, the effect becomes more pronounced but shifts to a Strouhal number which is much lower than that expected from linear, inviscid instability of the separated shear layer. |
| File Size | 1151440 |
| Page Count | 13 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910002362 |
| Archival Resource Key | ark:/13960/t19k97r8r |
| Language | English |
| Publisher Date | 1990-10-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Boundary Layer Separation Shear Layers Aerodynamic Drag Acoustic Excitation Airfoil Profiles Strouhal Number Flow Distribution Reattached Flow Inviscid Flow Aerodynamic Stalling Leading Edges Lift Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
