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Effects of winglets on the drag of a low-aspect-ratio configuration
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Smith, Leigh Ann Campbell, Richard L. |
| Copyright Year | 1996 |
| Description | A wind-tunnel investigation has been performed to determine the effect of winglets on the induced drag of a low-aspect-ratio wing configuration at Mach numbers between 0.30 and 0.85 and a nominal angle-of-attack range from -2 deg to 20 deg. Results of the tests at the cruise lift coefficient showed significant increases in lift-drag ratio for the winglet configuration relative to a wing-alone configuration designed for the same lift coefficient and Mach number. Further, even larger increases in lift-drag ratio were observed at lift coefficients above the design value at all Mach numbers tested. The addition of these winglets had a negligible effect on the static lateral-directional stability characteristics of the configuration. No tests were made to determine the effect of these winglets at supersonic Mach numbers, where increases in drag caused by winglets might be more significant. Computational analyses were also performed for the two configurations studied. Linear and small-disturbance formulations were used. The codes were found to give reasonable performance estimates sufficient for predicting changes of this magnitude. |
| File Size | 2780563 |
| Page Count | 66 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19960015890 |
| Archival Resource Key | ark:/13960/t3jx39g3g |
| Language | English |
| Publisher Date | 1996-02-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Static Stability Winglets Computational Fluid Dynamics Low Aspect Ratio Wings Lift Drag Ratio Lateral Stability Aerodynamic Coefficients Aircraft Design Induced Drag Estimates Lift Aerodynamic Configurations Directional Stability Drag Reduction Supersonic Speed Wind Tunnel Tests Angle of Attack Fighter Aircraft Prediction Analysis Techniques Mach Number Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
