Open AccessInfluence of span-wise coherence on the acoustic radiation in a cylinder wake
Author(s) -
Lars Siegel,
Guosheng He,
Аrne Henning,
Karen Mülleners
Publication year - 2021
Publication title -
international symposium on particle image velocimetry.
Language(s) - English
Resource type - Journals
ISSN - 2769-7576
DOI - 10.18409/ispiv.v1i1.127
Subject(s) - wake , anechoic chamber , particle image velocimetry , acoustics , physics , span (engineering) , wind tunnel , coherence (philosophical gambling strategy) , nozzle , aeroacoustics , cylinder , optics , radius , microphone , mechanics , sound pressure , engineering , geometry , structural engineering , mathematics , turbulence , computer science , computer security , quantum mechanics , thermodynamics
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.