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Impulsively-Generated Pressure Transients and Strains in a Cylindrical Fluid-Filled Tube Terminated by a Converging Section

Veilleux, Jean-Christophe and Shepherd, Joseph E. (2017) Impulsively-Generated Pressure Transients and Strains in a Cylindrical Fluid-Filled Tube Terminated by a Converging Section. In: ASME 2017 Pressure Vessels and Piping Conference. Vol.4. American Society of Mechanical Engineers , New York, NY, Art. No. V004T04A005. ISBN 978-0-7918-5797-7. http://resolver.caltech.edu/CaltechAUTHORS:20180208-150514369

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Abstract

The syringe in a subcutaneous autoinjector may be subjected to internal pressure transients due to the normal operation of the injection mechanism. These transients are similar to transients in fluid-filled pipelines observed during water hammer events. In this paper, the effect of an air gap in the syringe and a converging section are studied experimentally and numerically in a model system which consists of a fluid-filled metal tube that is impulsively loaded with a projectile to simulate the action of the autoinjector mechanism operation. The air between the buffer and the water results in a complex interaction between the projectile and the buffer. Also, there are tension waves inside the tube due to the presence of a free surface, and this causes distributed cavitation which, in turn, gives rise to steepening of the pressure waves. The converging section can amplify the pressure waves if the wave front is sharp. Pressures as high as 50 MPa have been measured at the apex of the cone with impact velocities of 5.5 m/s.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1115/PVP2017-65471DOIArticle
http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2660505PublisherArticle
ORCID:
AuthorORCID
Shepherd, Joseph E.0000-0003-3181-9310
Additional Information:© 2017 ASME.
Group:GALCIT
Subject Keywords:Pressure, Fluids, Transients (Dynamics)
Record Number:CaltechAUTHORS:20180208-150514369
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180208-150514369
Official Citation:Veilleux J, Shepherd JE. Impulsively-Generated Pressure Transients and Strains in a Cylindrical Fluid-Filled Tube Terminated by a Converging Section. ASME. ASME Pressure Vessels and Piping Conference, Volume 4: Fluid-Structure Interaction ():V004T04A005. doi:10.1115/PVP2017-65471
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84744
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Feb 2018 00:20
Last Modified:09 Feb 2018 00:20

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