Samenvatting
An innovative aeroacoustic prediction method for Contra-Rotating Open Rotors (CROR)
based on the nonlinear harmonic method (NLH) for the CFD computations and on the
Ffowcs Williams and Hawkings (FW-H) equations for the far-field acoustic propagation is
described. This method is tested on a generic 8x8 puller CROR at typical take-off conditions.
The outstanding efficiency of the prediction method in terms of CPU cost is demonstrated in
this study. An analysis of the aerodynamic interactions between the two rotors as well as of
the aeroacoustic field radiated in the far-field is presented, allowing for an improved
understanding of noise generation mechanisms. Sensitivity studies on certain computational
parameters are presented to provide guidelines for the numerical prediction of noise
generated by CROR.
based on the nonlinear harmonic method (NLH) for the CFD computations and on the
Ffowcs Williams and Hawkings (FW-H) equations for the far-field acoustic propagation is
described. This method is tested on a generic 8x8 puller CROR at typical take-off conditions.
The outstanding efficiency of the prediction method in terms of CPU cost is demonstrated in
this study. An analysis of the aerodynamic interactions between the two rotors as well as of
the aeroacoustic field radiated in the far-field is presented, allowing for an improved
understanding of noise generation mechanisms. Sensitivity studies on certain computational
parameters are presented to provide guidelines for the numerical prediction of noise
generated by CROR.
Originele taal-2 | English |
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Titel | AIAA Paper, AIAA 2011-2765 |
Status | Published - 5 jun 2011 |
Evenement | Unknown - Duur: 5 jun 2011 → … |
Conference
Conference | Unknown |
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Periode | 5/06/11 → … |