| Autor: |
Frink, William D., Jr. |
| Přispěvatelé: |
Hebbar, Sheshagiri K., Platzer, Max F., Naval Postgraduate School (U.S.), Department of Aeronautics and Astronautics |
| Jazyk: |
angličtina |
| Rok vydání: |
1990 |
| Předmět: |
|
| Popis: |
A low-speed wind tunnel investigation was conducted to examine the vortex wake downstream of a three-percent scale model of the YF-17 lightweight fighter prototype at high angles of attack. The study was in support of NASA ames Research Center's wind tunnel investigation of a full scale FA-18 as part of NASA's High Alpha Technology Program. Smoke flow visualization was used to locate the downstream vortex wake. Hot-wire surveys were taken through the vortex at two stations; one directly aft of the model and the other at a station three model lengths downstream of the model. The effect of adding a fence to the leading edge extension (LEX) was studied. Power spectra from the hot-wire were recorded for the survey station directly aft of the model. Results show that: peak turbulent fluctuation at this station occurred at 25 deg angle of attack; lateral turbulent fluctuation greatly diminished at the far downstream station; and the addition of the LEX fence shifted energy content of turbulence toward higher frequencies. http://archive.org/details/hotwiresurveysin1094527586 Major, United States Army Approved for public release; distribution is unlimited. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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