Aerodynamic Noise Prediction of Strut-Braced Wing Aircraft
Emanuele Sticchi (TU Delft - Wind Energy)
Daniele Ragni (TU Delft - Wind Energy)
D. Casalino (TU Delft - Wind Energy)
F. Avallone (Politecnico di Torino)
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Abstract
Motivated by the potential benefit of Strut-Braced Wing (SBW) configurations in reducing fuel burn, this manuscript investigates the noise generated by the interaction between the propeller slipstream and the SBW. The flow field on a regional transport aircraft is computed in high-lift condition by means of a high-fidelity Lattice Boltzmann solver with very large eddy simulation approach. The acoustic far field is obtained using the Ffowcs-Williams and Hawkings acoustic analogy. The analysis shows that the main aeroacoustic effect due to the interaction between the SBW and the propeller slipstream is the emergency of a tonal noise scattering from the region bounded by the pressure side of the main wing and the suction side of the strut at twice the blade passing frequency.