TY - GEN
T1 - Experimental investigation of acoustical coupling between cavity flow and cross cylinder wake
AU - Xu, Liang
AU - Guo, Hao
AU - Hu, Tianxiang
AU - Liu, Peiqing
N1 - Publisher Copyright:
© 2018 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
PY - 2018
Y1 - 2018
N2 - An experimental investigation of acoustic coupling between cavity flow and cross circular cylinder wake was conducted. In this experiment, l and h are changed to determine the relative positions between cross circular cylinder and the cavity. For cavity noise, Rossiter modes is nearly the same in far field results and near field results, cavity modes is only observed in near field results. For vortex shedding noise, it is mainly observed in far field results. Vortex shedding noise is apparent when h is higher and l is smaller. Coincidently, suppression effect on Rossiter modes and enhanced effect on cavity modes are also better when h is higher and l is smaller. Besides, Rossiter modes is more like a resonant tone after suppression by cross circular and the enhanced cavity modes are chosen by the tonal frequencies of the vortex shedding noise. Finally, there is an obvious boundary acquired from St Contour which can be regard as a reference to judge the strength of the interference between cross circular cylinder wake and the shear layer separated from the leading edge of the cavity.
AB - An experimental investigation of acoustic coupling between cavity flow and cross circular cylinder wake was conducted. In this experiment, l and h are changed to determine the relative positions between cross circular cylinder and the cavity. For cavity noise, Rossiter modes is nearly the same in far field results and near field results, cavity modes is only observed in near field results. For vortex shedding noise, it is mainly observed in far field results. Vortex shedding noise is apparent when h is higher and l is smaller. Coincidently, suppression effect on Rossiter modes and enhanced effect on cavity modes are also better when h is higher and l is smaller. Besides, Rossiter modes is more like a resonant tone after suppression by cross circular and the enhanced cavity modes are chosen by the tonal frequencies of the vortex shedding noise. Finally, there is an obvious boundary acquired from St Contour which can be regard as a reference to judge the strength of the interference between cross circular cylinder wake and the shear layer separated from the leading edge of the cavity.
UR - https://www.scopus.com/pages/publications/85051290059
U2 - 10.2514/6.2018-3471
DO - 10.2514/6.2018-3471
M3 - 会议稿件
AN - SCOPUS:85051290059
SN - 9781624105609
T3 - 2018 AIAA/CEAS Aeroacoustics Conference
BT - 2018 AIAA/CEAS Aeroacoustics Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA/CEAS Aeroacoustics Conference, 2018
Y2 - 25 June 2018 through 29 June 2018
ER -