An axisymmetric cavity along a pipe is a commonly encountered construction in industrial applications, which can also be considered as a unit element of a corrugated pipe. At critical conditions such a configuration causes severe noise problems, called whistling. Whistling is a self-sustained oscillation, driven by a flow-acoustic interaction. In the current study, the hydrodynamic interaction between two such cavities is addressed in the presence of a coupling standing wave along the pipe. The phenomenon is investigated both experimentally and numerically. The hydrodynamic interaction has a strong effect both for the amplitude and for the Strouhal number of the whistling, which depends critically on the separation distance between two adjacent cavities.
Hydrodynamic Interaction Between Whistling Axisymmetric Cavities in the Presence of a Coupling Longitudinal Standing Wave
Nakibog˘lu, G, Rudenko, O, Golliard, J, & Hirschberg, A. "Hydrodynamic Interaction Between Whistling Axisymmetric Cavities in the Presence of a Coupling Longitudinal Standing Wave." Proceedings of the ASME 2011 Pressure Vessels and Piping Conference. Volume 4: Fluid-Structure Interaction. Baltimore, Maryland, USA. July 17–21, 2011. pp. 287-295. ASME. https://doi.org/10.1115/PVP2011-57487
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