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Study of semi-span model testing techniques
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gatlin, Gregory M. McGhee, Robert J. |
| Copyright Year | 1996 |
| Description | An investigation has been conducted in the NASA Langley 14- by 22-Foot Subsonic Tunnel in order to further the development of semi-span testing capabilities. A twin engine, energy efficient transport (EET) model with a four-element wing in a takeoff configuration was used for this investigation. Initially a full span configuration was tested and force and moment data, wing and fuselage surface pressure data, and fuselage boundary layer measurements were obtained as a baseline data set. The semi-span configurations were then mounted on the wind tunnel floor, and the effects of fuselage standoff height and shape as well as the effects of the tunnel floor boundary layer height were investigated. The effectiveness of tangential blowing at the standoff/floor juncture as an active boundary-layer control technique was also studied. Results indicate that the semi-span configuration was more sensitive to variations in standoff height than to variations in floor boundary layer height. A standoff height equivalent to 30 percent of the fuselage radius resulted in better correlation with full span data than no standoff or the larger standoff configurations investigated. Undercut standoff leading edges or the use of tangential blowing in the standoff/ floor juncture improved correlation of semi-span data with full span data in the region of maximum lift coefficient. |
| File Size | 981644 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19960020544 |
| Archival Resource Key | ark:/13960/t4gn34k63 |
| Language | English |
| Publisher Date | 1996-06-20 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Aerodynamic Configurations Transport Aircraft Wind Tunnel Tests Semispan Models Aerodynamic Coefficients Takeoff Boundary Layers Lift Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
