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Acoustic surveys of a scaled-model cestol transport aircraft in static and forward speed conditions
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Horne, Clifton Burnside, Nathan |
| Copyright Year | 2012 |
| Description | An 11% scale-model of a Cruise-Efficient Short Take-off and Landing (CESTOL) scalemodel test was recently completed. The test was conducted in the AEDC National Full-Scale Aerodynamic Complex (NFAC) 40- by 80-Foot Wind Tunnel at NASA Ames Research Center. The model included two over-wing pod-mounted turbine propulsion simulators (TPS). The hybrid blended wing-body used a circulation control wing (CCW) with leadingand trailing-edge blowing. The bulk of the test matrix included three forward velocities (40 kts, 60 kts, and 100kts), angle-of-attack variation between -5 and 25 , and CCW mass flow variation. Seven strut-mounted microphones outboard of the left wing provided source directivity. A phased microphone array was mounted outboard of the right wing for source location. The goal of this paper is to provide a preliminary look at the acoustic data acquired during the Advanced Model for Extreme Lift and Improved Aeroacoustics (AMELIA) test for 0 angle-of-attack and 0 sideslip conditions. Data presented provides a good overview of the test conditions and the signal-to-noise quality of the data. TPS height variation showed a difference of 2 dB to 3 dB due to wing shielding. Variation of slot mass flow showed increases of 12 dB to 26 dB above the airframe noise and the TPS increased the overall levels an additional 5 dB to 10 dB. |
| File Size | 4231823 |
| Page Count | 11 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120016232 |
| Archival Resource Key | ark:/13960/t8z947c7h |
| Language | English |
| Publisher Date | 2012-06-04 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Static Pressure Aircraft Landing Leading Edge Flaps Scale Models Transport Aircraft Signal To Noise Ratios Blended-wing-body Configurations Velocity Distribution Wing Slots Microphones Phased Arrays Mass Flow Rate Wind Tunnel Tests Vertical Takeoff Cruising Flight Tangential Blowing Angle of Attack Simulators Trailing Edge Flaps Aerodynamic Characteristics Aeroacoustics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
