An Experimental Investigation Of
Collapsible Tube Flows At The Onset Of
Self-excited Oscillations
Author(s)
V. Oruç & M. Ö. Çarpınlıoğlu
Abstract
In this paper, suddenly arisen self-excited oscillations which were observed
during airflow through some collapsible rubber tubes are analysed and evaluated
without paying attention to the mechanisms originating the oscillations. The
principal experimental results are the pressure and velocity measurements
corresponding to the instant at which oscillations are emerged and frequency
determined from those measurements. The time-dependent pressure values were
obtained by means of pressure transducers while a hot wire anemometer was
used for measuring the velocity of the flow. It was verified that the flow had
been highly unsteady and chaotic during the oscillations. The variety of
experimental parameters (tube material, tube-wall thickness, tube length, flow
rate) presented in the study should be useful on account of acquiring more
general results related to the subject. It had been noticed that all of these
parameters directly affected behaviour of the oscillations and conditions of their
appearance; therefore it has been emphasized that they should be carefully taken
into consideration in the collapsible tube flow investigations. The results of this
study should also be important in of using air instead of water which had been
widely preferred as fluid almost in all of the previous experimental
investigations.
Keywords: transmural pressure, fluid-solid interaction, self-excited oscillations,
Starling resistor, collapsible tube flow, data acquisition, Womersley number.
Keywords
transmural pressure, fluid-solid interaction, self-excited oscillations,
Starling resistor, collapsible tube flow, data acquisition, Womersley number.
Related Book
Other papers in this volume
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