@inproceedings{73afdb33ab89497787bbd5c4091a594d,
title = "Analysis of noise-controlled shear-layers",
abstract = "Despite very similar flow-structures, the uncontrolled and controlled shear-layers of Wei & Freund1 were found to generate radically different sound fields (a difference of up to 11dB). In this work we analyse these flows-with a view to better understanding what led to this sound reduction-using two approaches: (1) we analyse the in-flow pressure fields in the Kx - ω domain, where we find that the acoustically-matched components of the controlled flow have been reduced substantially, while the global structure remains very similar; and, (2) we use causality-correlations to study the kernel of the Lighthill solution: the spatiotemporal source-correlation fields are found to have been dramatically degenerated by virtue of very subtle changes in the controlled flow's evolution.",
author = "D. Eschricht and P. Jordan and M. Wei and J. Freund and F. Thiele",
year = "2007",
doi = "10.2514/6.2007-3660",
language = "English (US)",
isbn = "9781624100031",
series = "13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference)",
publisher = "American Institute of Aeronautics and Astronautics Inc.",
booktitle = "13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference)",
note = "13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference) ; Conference date: 21-05-2007 Through 23-05-2007",
}