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Computational design of low aspect ratio wing-winglet configurations for transonic wind-tunnel tests
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Brown, Christopher K. Kuhlman, John M. |
| Copyright Year | 1989 |
| Description | Computational designs were performed for three different low aspect ratio wing planforms fitted with nonplanar winglets; one of the three configurations was selected to be constructed as a wind tunnel model for testing in the NASA LaRC 8-foot transonic pressure tunnel. A design point of M = 0.8, C(sub L) is approximate or = to 0.3 was selected, for wings of aspect ratio equal to 2.2, and leading edge sweep angles of 45 deg and 50 deg. Winglet length is 15 percent of the wing semispan, with a cant angle of 15 deg, and a leading edge sweep of 50 deg. Winglet total area equals 2.25 percent of the wing reference area. The design process and the predicted transonic performance are summarized for each configuration. In addition, a companion low-speed design study was conducted, using one of the transonic design wing-winglet planforms but with different camber and thickness distributions. A low-speed wind tunnel model was constructed to match this low-speed design geometry, and force coefficient data were obtained for the model at speeds of 100 to 150 ft/sec. Measured drag coefficient reductions were of the same order of magnitude as those predicted by numerical subsonic performance predictions. |
| File Size | 2634106 |
| Page Count | 116 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900008223 |
| Archival Resource Key | ark:/13960/t6k12060h |
| Language | English |
| Publisher Date | 1989-10-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Sweep Angle Aerodynamic Drag Winglets Low Aspect Ratio Wings Low Speed Transonic Wind Tunnels Wing Planforms Performance Prediction Aerodynamic Coefficients Leading Edge Sweep Wind Tunnel Tests Wind Tunnel Models Camber Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
