Aeroacoustic Evaluation of Flap and Landing Gear Noise Reduction Concepts

@inproceedings{Khorrami2014AeroacousticEO,
  title={Aeroacoustic Evaluation of Flap and Landing Gear Noise Reduction Concepts},
  author={Mehdi R. Khorrami and William M. Humphreys and David P Lockard and Patricio A. Ravetta},
  year={2014}
}
Aeroacoustic measurements for a semi-span, 18% scale, high-fidelity Gulfstream aircraft model are presented. The model was used as a test bed to conduct detailed studies of flap and main landing gear noise sources and to determine the effectiveness of numerous noise mitigation concepts. Using a traversing microphone array in the flyover direction, an extensive set of acoustic data was obtained in the NASA Langley Research Center 14by 22-Foot Subsonic Tunnel with the facility in the acoustically… 
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The hardware development, ground operations, and flight operations which went into acquiring the desired acoustic measurements were provided, and in general, the flights were successful and demonstrated the noise reduction benefits of the ACTE flaps, the LAGER gear fairings, and the L AGER gear cavity treatments.
Towards Full Aircraft Airframe Noise Prediction: Detached Eddy Simulations
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