Noise and Sonic Fatigue of High Lift Devices. Aeroacoustic Loads
Final rept. Mar 1975-May 1977
DOUGLAS AIRCRAFT CO LONG BEACH CA
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An extensive experimental program, applicable to externally blown flaps EBF of STOL vehicles, was conducted providing detailed information on the surface loads produced during jet impingement. Test specimens used in the program were varied from a simple flat plate to a complicated wing-flaps configuration. An underlying premise concerning the test specimen selection was that simple plate specimens can provide useful data for wing-flaps configurations. The test specimens included flat and curved plates and a wing- flaps model. Data collected from the test cases for each specimen included static pressures and single and two-point statistics of the fluctuating pressures. In addition, temperature data were obtained in flat plate cases for heat transfer studies. These results for each test case are tabulated on layouts of the specimen surfaces showing them in their proper spatial relation to each other. The results are also plotted for ease in recognizing trends produced from parametric variations. The more pronounced trends are discussed along with possible reasons for them.
- Fluid Mechanics