Articles | Volume 5, issue 1
Special issue:
Regular research article
06 Apr 2016
Regular research article |  | 06 Apr 2016

High-speed camera-based measurement system for aeroacoustic investigations

Johannes Gürtler, Daniel Haufe, Anita Schulz, Friedrich Bake, Lars Enghardt, Jürgen Czarske, and Andreas Fischer

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Cited articles

Adrian, R. J.: Twenty years of particle image velocimetry, Exp. Fluids, 39, 159–169, 2005.
Bechert, D. W.: Sound absorption caused by vorticity shedding, demonstrated with a jet flow, J. Sound Vib., 70, 389–405, 1980.
Eldredge, J. D. and Dowling, A. P.: The absorption of axial acoustic waves by a perforated liner with bias flow, J. Fluid Mech., 485, 307–335, 2003.
Fischer, A., Büttner, L., Czarske, J., Eggert, M., Grosche, G., and Müller, H.: Investigation of time-resolved single detector Doppler global velocimetry using sinusoidal laser frequency modulation, Meas. Sci. Technol., 18, 2529–2545, 2007.
Fischer, A., König, J., and Czarske, J.: Speckle noise influence on measuring turbulence spectra using time-resolved Doppler global velocimetry with laser frequency modulation, Meas. Sci. Technol., 19, 125402,, 2008.
Short summary
The interaction of sound and flow enables an efficient noise damping. Understanding this aeroacoustic damping phenomenon requires simultaneous measurement of flow and sound fields. Using a high-speed CMOS camera, two-component flow velocity measurements are performed in a three-dimensional region of interest. The sensor system can simultaneously capture sound and turbulent flow velocity oscillations. The presented measurements reveal that the sound energy is transferred into flow energy.
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