TY - GEN
T1 - Study of the attenuation of sound propagating through rotor cascade and a variable area duct
AU - Li, Zhibin
AU - Wang, Xiaoyu
AU - Sun, Dakun
AU - Sun, Xiaofeng
N1 - Publisher Copyright:
© 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling. All rights reserved.
PY - 2018
Y1 - 2018
N2 - Rotor-stator interaction, a clear and powerful noise source, usually takes place on stator with the upstream rotor-wake impacting. Consequently, the interaction noise must propagate through the rotor to radiate from the engine nacelle. This propagation attenuates the acoustic emissions, and should be considered when calculating interaction noise. The transfer element method is applied in the present paper to analyse the influence of rotor on the transmission of the interaction noise. The influence of a nacelle with variable area duct and intake cone is also considered. The method will be illustrated by means of numerical examples. It appears that, the influence of duct shape on sound propagation cannot be ignored if accurate calculations are performed. Depending on the reasonable choice of stator number, the shielding effect of rotor can generate a positive reduction in acoustic power. In addition, the chord width is an important parameter to optimize the acoustic shielding of the rotor.
AB - Rotor-stator interaction, a clear and powerful noise source, usually takes place on stator with the upstream rotor-wake impacting. Consequently, the interaction noise must propagate through the rotor to radiate from the engine nacelle. This propagation attenuates the acoustic emissions, and should be considered when calculating interaction noise. The transfer element method is applied in the present paper to analyse the influence of rotor on the transmission of the interaction noise. The influence of a nacelle with variable area duct and intake cone is also considered. The method will be illustrated by means of numerical examples. It appears that, the influence of duct shape on sound propagation cannot be ignored if accurate calculations are performed. Depending on the reasonable choice of stator number, the shielding effect of rotor can generate a positive reduction in acoustic power. In addition, the chord width is an important parameter to optimize the acoustic shielding of the rotor.
KW - Rotor-stator interaction
KW - Shielding effect of rotor
KW - Transfer element method
KW - Variable area duct
UR - https://www.scopus.com/pages/publications/85058693333
M3 - 会议稿件
AN - SCOPUS:85058693333
T3 - 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling
SP - 1319
EP - 1326
BT - 25th International Congress on Sound and Vibration 2018, ICSV 2018
PB - International Institute of Acoustics and Vibration, IIAV
T2 - 25th International Congress on Sound and Vibration 2018: Hiroshima Calling, ICSV 2018
Y2 - 8 July 2018 through 12 July 2018
ER -