A series of experiments, which simulate the flow and the acoustics in the initial rows of a cross flow tubular heat exchanger using two plates located in tandem in a hard walled duct, are described. It is shown that when a vortex is shed from the upstream plate and approaches the second plate it excites a resonant sound field, provided the acoustic particle velocities have a particular phase relationship with the vortices. This relationship permits the identification of potential acoustic sources and also suggests possible new methods for suppressing acoustic resonances in cross flow tubular heat exchangers.
|Number of pages||6|
|Publication status||Published - 1 Jan 1987|