CFD modelling of a diaphragm stirling Cryocooler

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aut.conference.typePaper Published in Proceedings
aut.researcherGschwendtner, Michael
dark.contributor.authorCaughley, AJ
dark.contributor.authorSellier, M
dark.contributor.authorTucker, A
dark.contributor.authorGschwendtner, MA
dc.contributor.authorGschwendtner, MA
dc.contributor.authorCaughley, AJ
dc.contributor.authorSellier, M
dc.contributor.authorTucker, A
dc.date.accessioned2012-12-19T23:11:51Z
dc.date.available2012-12-19T23:11:51Z
dc.date.copyright2012
dc.date.issued2012
dc.description.abstractIndustrial Research Ltd has developed a unique diaphragm-based pressure wave generator technology for employment in pulse tube and Stirling cryocoolers. The system uses a pair of metal diaphragms to separate the clean cryocooler gas circuit from a conventionally lubricated mechanical driver, thus producing a clean pressure wave with a long-life drive. The same diaphragm concept has been extended to support and seal the displacer in a free piston Stirling expander. Diaphragms allow displacer movement without rubbing or clearance gap seals, hence allowing the development of cost-effective, long-life and efficient Stirling cryocoolers. A proofof- concept prototype has achieved cryogenic temperatures. The diaphragm’s large diameter and short stroke produces a significant radial component to the oscillating flow fields inside the cryocooler which are not modelled in one-dimensional analysis tools such as Sage. Compared with standard pistons, the gas-to-wall heat transfer is increased due to the higher velocities and smaller hydraulic diameters. This paper presents the results of Computational Fluid Dynamics (CFD) analysis used to model the flow and gas-to-wall heat transfer inside the cryocooler, including experimental validation of the CFD to produce a robust analysis.
dc.identifier.citationThe 17th International Cryocooler Conference (ICC-17), July 9-12, 2012 at the Sheraton Universal Hotel in Universal City, California.
dc.identifier.urihttps://hdl.handle.net/10292/4956
dc.publisherCryogenic Society of America
dc.relation.urihttp://cryocooler.org/wp-content/uploads/icc17/Abstract-book-5-15-12-MEM-v7.pdf
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in (see Citation). The original publication is available at (see Publisher's Version).
dc.rights.accessrightsOpenAccess
dc.titleCFD modelling of a diaphragm stirling Cryocooler
dc.typeConference Contribution
pubs.elements-id132162
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Design & Creative Technologies
pubs.organisational-data/AUT/Design & Creative Technologies/School of Engineering
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