Friction and leakage analysis of the blocker-type valve designed for a revolving vane expander

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dc.contributor.author Naseri, Ali en
dc.contributor.author Norris, Stuart en
dc.contributor.author Subiantoro, Alison en
dc.coverage.spatial London, UK en
dc.date.accessioned 2019-10-01T03:23:06Z en
dc.date.issued 2019-09-03 en
dc.identifier.citation IOP Conference Series : Materials Science and Engineering. IOP Publishing. 604. 03 Sep 2019 en
dc.identifier.issn 1757-8981 en
dc.identifier.uri http://hdl.handle.net/2292/48214 en
dc.description.abstract Friction and leakage are two known issues that contribute to inefficiencies of rotary vane machines, and the Revolving Vane (RV) mechanism was introduced to reduce them. When used as an expander, a mechanism to determine the timing of the suction process in RV machine is required. In this study, a blocker-type valve is proposed for the suction control, and a simulation is carried out to investigate its friction and leakage characteristics. The valve comprises a stationary blocker that blocks high-pressure working fluid from entering the working chambers during expansion. In order to reduce friction, there should be a clearance between the rotary parts and the stationary blocker, which inevitably causes leakage of the working fluid into the working chambers. The leakage was modelled as a compressible flow through a convergent nozzle followed by a Fanno flow through an adiabatic constant cross-section channel. The results showed that the amount of leakage in the absence of lubricants is almost higher than ideal expander flow rate. However, this leakage demonstrated a positive contribution to the output torque as the results of the cylinder wall shear stress. The results suggested the importance of using lubricants in this valve design. en
dc.publisher IOP Publishing en
dc.relation.ispartof 11th International Conference on Compressors and their Systems en
dc.relation.ispartofseries IOP Conference Series : Materials Science and Engineering en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri https://creativecommons.org/licenses/by/3.0/ en
dc.title Friction and leakage analysis of the blocker-type valve designed for a revolving vane expander en
dc.type Conference Item en
dc.identifier.doi 10.1088/1757-899X/604/1/012083 en
pubs.issue 1 en
pubs.volume 604 en
dc.rights.holder Copyright: The authors en
pubs.author-url https://iopscience.iop.org/article/10.1088/1757-899X/604/1/012083/meta en
pubs.finish-date 2019-09-11 en
pubs.start-date 2019-09-09 en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Proceedings en
pubs.elements-id 775069 en
pubs.org-id Engineering en
pubs.org-id Mechanical Engineering en
pubs.record-created-at-source-date 2019-06-21 en


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