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Full-potential modeling of blade-vortex interactions
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Jones, H. E. Caradonna, F. X. |
| Copyright Year | 1986 |
| Description | A comparison is made of four different models for predicting the unsteady loading induced by a vortex passing close to an airfoil. (1) The first model approximates the vortex effect as a change in the airfoil angle of attack. (2) The second model is related to the first but, instead of imposing only a constant velocity on the airfoil, the distributed effect of the vortex is computed and used. This is analogous to a lifting surface method. (3) The third model is to specify a branch cut discontinuity in the potential field. The vortex is modeled as a jump in potential across the branch cut, the edge of which represents the center of the vortex. (4) The fourth method models the vortex expressing the potential as the sum of a known potential due to the vortex and an unknown perturbation due to the airfoil. The purpose of the current study is to investigate the four vortex models described above and to determine their relative merits and suitability for use in large three-dimensional codes. |
| File Size | 1289642 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870009099 |
| Archival Resource Key | ark:/13960/t89h0j78k |
| Language | English |
| Publisher Date | 1986-08-01 |
| Access Restriction | Open |
| Subject Keyword | Aeronautics (general) Helicopters Vortices Rotors Blade-vortex Interaction Wakes Potential Gradients Airfoils Models Perturbation Rotary Wing Aircraft Angle of Attack Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
