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Comparison of rolling moment characteristics during roll oscillations for a low and a high aspect ratio configuration
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wilborn, James E. Shah, Gautam H. Brandon, Jay M. Foster, John V. Gato, William |
| Copyright Year | 2004 |
| Description | Improvements in testing and modeling of nonlinear and unsteady aerodynamic effects for flight dynamics predictions of vehicle performance is critical to enable the design and implementation of new, innovative vehicle concepts. Any configuration which exhibits significant flow separation, nonlinear aerodynamics, control interactions or attempts maneuvering through one or more conditions such as these is, at present, a challenge to test, model or predict flight dynamic responses prior to flight. Even in flight test experiments, adequate models are not available to study and characterize the complex nonlinear and time-dependent flow effects occurring during portions of the maneuvering envelope. Traditionally, airplane designs have been conducted to avoid these areas of the flight envelope. Better understanding and characterization of these flight regimes may not only reduce risk and cost of flight test development programs, but also may pave the way for exploitation of those characteristics that increase airplane capabilities. One of the hurdles is that the nonlinear/unsteady effects appear to be configuration dependent. This paper compares some of the dynamic aerodynamic stability characteristics of two very different configurations - representative of a fighter and a transport airplane - during dynamic body-axis roll wind tunnel tests. The fighter model shows significant effects of oscillation frequency which are not as apparent for the transport configuration. |
| File Size | 520656 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040110349 |
| Archival Resource Key | ark:/13960/t8pc7z65b |
| Language | English |
| Publisher Date | 2004-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Boundary Layer Separation Flight Tests High Aspect Ratio Time Dependence Unsteady Aerodynamics Dynamic Stability Wind Tunnel Tests Nonlinearity Mathematical Models Aerodynamic Stability Fighter Aircraft Flight Envelopes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
