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Comparison of aerodynamic theory and experiment for jet-flap wings
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Vogler, R. P. Yip, L. P. Gainer, T. G. |
| Copyright Year | 1976 |
| Description | Aerodynamic theory predictions made for a jet flapped wing were compared with experimental data obtained in a fairly extensive series of tests in the Langley V/STOL tunnel. The tests were made on a straight, rectangular wing and investigated two types of jet flap concepts: a pure jet flap with high jet deflection and a wing with blowing at the knee of a plain trailing edge flap. The tests investigated full and partial span blowing for wing aspect ratios of 8.0 and 5.5 and momentum coefficients from 0 to about 4. The total lift, drag, and pitching moment coefficients predicted by the theory were in excellent agreement with experimental values for the pure jet flap, even with the high jet deflection. The pressure coefficients on the wing, and hence the circulation lift coefficients, were underpredicted, however, because of the linearizing assumptions of the planar theory. The lift, drag, and pitching moment coefficients, as well as pressure coefficients, were underpredicted for the wing with blowing over the flap because of the failure of the theory to account for the interaction effect of the high velocity jet passing over the flap. |
| File Size | 1240071 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780016109 |
| Archival Resource Key | ark:/13960/t5q863j04 |
| Language | English |
| Publisher Date | 1976-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Aerodynamic Drag Pitching Moments Wings Wind Tunnel Tests Performance Prediction Pressure Distribution Aerodynamic Coefficients Jet Flaps Powered Lift Aircraft Aerodynamic Characteristics Lift Augmentation Upper Surface Blown Flaps Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
