Modelling of Flow Characteristics of Main Rotor with Elliptical Root Section in Hover Mode

Modelling of Flow Characteristics of Main Rotor with Elliptical Root Section in Hover Mode

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The modelling of a helicopter main rotor flow field in hover regime is being considered.The aerodynamic and aeroacoustics characteristics of two rotor models Alfalfa with different blade root geometries are compared.The first rotor has the shape of NACA0012 air foil in the root section of the blades.The second rotor model has an elliptic air foil in the Shaving root of the rotor blade.

The amplitude and temporal characteristics of the aeroacoustics emission in near-field are investigated using Computational Fluid Dynamics (CFD).