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A preliminary study of the effects of vortex diffusers (winglets) on wing flutter
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Farmer, M. G. Doggett Jr., R. V. |
| Copyright Year | 1975 |
| Description | Some experimental flutter results are presented for a simple, flat-plate wing model and for the same wing model equipped with two different upper surface vortex diffusers over the Mach number range from about 0.70 to 0.95. Both vortex diffusers had the same planform, but one weighed about 0.3 percent of the basic wing weight, whereas the other weighed about 1.8 percent of the wing weight. The addition of the lighter vortex diffuser reduced the flutter dynamic pressure by about 3 percent; the heavier vortex diffuser reduced the flutter dynamic pressure by about 12 percent. The experimental flutter results are compared at a Mach number of 0.80 with analytical flutter results obtained by using doublet lattice and lifting surface (Kernel function) unsteady aerodynamic theories. |
| File Size | 1760838 |
| Page Count | 25 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19760005931 |
| Archival Resource Key | ark:/13960/t8nd0r24z |
| Language | English |
| Publisher Date | 1975-12-03 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Unsteady Flow Wings Transonic Flutter Vortices Lift Devices Unsteady Aerodynamics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
