Influence of span-wise coherence on the acoustic radiation in a cylinder wake

Authors

  • Lars Siegel German Aerospace Center (DLR), Germany
  • Guosheng He École polytechnique fédérale de Lausanne (EPFL)
  • Arne Henning German Aerospace Center (DLR), Germany
  • Karen Mulleners École polytechnique fédérale de Lausanne (EPFL)

DOI:

https://doi.org/10.18409/ispiv.v1i1.127

Keywords:

Aeroacoutics, causality correlation, coherence

Abstract

The aim of this study is to detect and visualise the influence of span-wise coherence on propagating sound waves emanating from a flow around circular cylinders with span-wise variations of the local radius. Synchronous particle image velocimetry (PIV) and microphone measurements are performed in a circular wind tunnel with a nozzle size of 0.4 m×0.4 m at a maximum flow speed of U∞ = 43m s−1 . The test section is surrounded by a full anechoic chamber of approximately 9 m×9 m×5 m.

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Published

2021-08-01

Issue

Vol. 1 No. 1 (2021)

Section

Jets, Shear Layers and Wakes

License

Copyright for all articles and abstracts is retained by their respective authors