AERONOISE

Aircraft Noise Prediction Program

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  • The program incorporates publicly available noise prediction methods based on empirical functions and experimental data.
  • The program can predict the noise for both subsonic and supersonic aircrafts.
  • The methods incorporated cover a variety of engine noise sources including fan, combustor, turbine and jet and airframe noise.
  • Propagation effects can also be considered including spherical spreading, atmospheric absorption and ground reflection and attenuation.
  • For fan noise prediction two methods are available, the classical Heidman with its revisions for small or advanced subsonic engines and the Gliebe method based on the empirical formulation of XF-120 fan data for high speed aircrafts.
  • Two methods are available for combustion noise. The first is the method proposed by R. K. Matta, which employs empirical data of core noise from turboshaft, turbojet, and turbofan engines. The second one is developed by Mathews and Rekos and uses several JT8D burner configurations and full-scale turbofan engine data.
  • The turbine noise can be predicted using one of the three available methods. The first is the method developed by Smith and Bushell for the broadband noise of an axial flow turbine. The second one is developed by General Electric company. The third method is developed by Krejsa and Valerino and is based on empirical correlation developed from turbine rig and full scale engine data.
  • For jet noise the following methods are available:
    • SAE ARP 876 (single stream)
    • Stone (single and double stream)
    • Pao & Rusell (Double stream only mixing noise)
    • Lu and Viswanathan (Boeing JN8C4)(for supersonic jets)
    • Stone and Clark (for 2-D mixer ejector nozzle system)
  • The airframe noise prediction method adopted is based on the method developed by Fink. Airframe noise is produced by elements of the wing, fuselage and landing gear.
  • The inputs needed by the AERONOISE program are aircraft and engine geometry data and engine performance data supplied from the engine performance code.