TY - GEN
T1 - Can jet noise be predicted using linear instability wavepackets?
AU - Semeraro, Onofrio
AU - Lesshafft, Lutz
AU - Sandberg, Richard D.
N1 - Publisher Copyright:
© Springer International Publishing Switzerland 2016.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - According to a recent hypothesis corroborated by experimental investigations, large-scale coherent structures in turbulent jet flows can be modelled as wavepackets. This conjecture suggests that these structures can be responsible for low-frequency acoustic radiation. In this contribution, we compute optimally forced stability wavepackets, based on mean flow data of a turbulent jet. The dataset is obtained from fully compressible DNS. The final aim is to assess the validity of the hypothesis by verifying to what extent the jet noise can be predicted by means of these linear structures.
AB - According to a recent hypothesis corroborated by experimental investigations, large-scale coherent structures in turbulent jet flows can be modelled as wavepackets. This conjecture suggests that these structures can be responsible for low-frequency acoustic radiation. In this contribution, we compute optimally forced stability wavepackets, based on mean flow data of a turbulent jet. The dataset is obtained from fully compressible DNS. The final aim is to assess the validity of the hypothesis by verifying to what extent the jet noise can be predicted by means of these linear structures.
U2 - 10.1007/978-3-319-30602-5_52
DO - 10.1007/978-3-319-30602-5_52
M3 - Conference contribution
AN - SCOPUS:84978975676
SN - 9783319306001
T3 - Springer Proceedings in Physics
SP - 413
EP - 418
BT - Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015
A2 - Segalini, Antonio
PB - Springer Science and Business Media, LLC
T2 - 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF2015
Y2 - 15 June 2015 through 18 June 2015
ER -