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Analysis and Characterization of Flow-Generated Sound
An-Institut Fluid- und Pumpentechnik Merseburg, Geusaer Stra?e, Merseburg, Germany
- 1 An-Institut Fluid- und Pumpentechnik Merseburg, Geusaer Stra?e, Merseburg, Germany
American Journal of Computational Mathematics·Volume 03 (2013)·Pages 362–367·Published 21 November 2013·DOI10.4236/ajcm.2013.34046
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Abstract
Flow-generated sound and velocity distributions of free flows are characterized by frequency spectra (FFT and several spectra from the octave spectrum over the one-third octave spectrum till the narrow band spectrum), by the PSD (power spectrum density) and wavelets. Whereas previously , flow processes are characterized by the average velocity, by the local velocity, if needed also by the three-dimensional velocity distribution and the degree of turbulence, also the flows and particular velocity distributions could be described by the acoustic pressure and level, by the power spectrum den sity and by wavelets, especially by the Gabor-Wavelet, as shown below.
KeywordsFluid FlowFluidsAkusticsSpectrumWavelets
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