The production of liquid vortex tones, and some associated phenomena
An account is given of the production of liquid vortex tones when perforated disks or hollow cylinders are rotated under water or kerosene. The tones produced are discontinuous, and their pitch may rise or fall as the rotor speed is increased. The effect of baffles on increasing or
decreesing the loudness of the tones is described. A stream of gas bubbles near a perforated rotor may increase the loudness of its vortex tones very considerably — an effect attributed to resonance and the diminution of the acoustic wave impedance of the medium.
Illustrations are given of the surprising behaviour and beautiful appearance of the jets and fountains produced by a perforated or slotted disk when it is rotated a little below a water surface. Some implications of the bearing of the phenomena on propeller erosion and submarine detection are mentioned. The need is emphasised for further experimental data to aid the formulation of a satisfactory mathematical theory of the phenomena.
Illustrations are given of the surprising behaviour and beautiful appearance of the jets and fountains produced by a perforated or slotted disk when it is rotated a little below a water surface. Some implications of the bearing of the phenomena on propeller erosion and submarine detection are mentioned. The need is emphasised for further experimental data to aid the formulation of a satisfactory mathematical theory of the phenomena.
Document Type: Research Article
Publication date: 01 January 1952
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