Abstract
In order to understand the oscillatory phenomenon of Hartmann-Sprenger tube flow an experiment using a two-dimensional tube was carried out, in which synchronous shadowphotography was applied to visualize the flow field changing periodically. At the same time, the pressure distribution in the flow field near the end closer to the nozzle, of the open tube, was obtained. From these exprimental results, the flow pattern during the oscillation was examined in detail and the necessary conditions for starting and maintaining a stable oscillatory flow in an H-S tube were established.
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