Repository logo
 
Publication

Conceptual analogy for modelling entrapped air action in hydraulic systems

2015-09-03Journal article Restricted access
Simple item page
dc.contributor.authorMartins, Sandra Carvalho
dc.contributor.authorde Sousa Ramos, Helena Maria
dc.contributor.authorAlmeida, António B.
dc.date.accessioned2016-02-23T10:50:59Z
dc.date.available2016-02-23T10:50:59Z
dc.date.issued2015-09-03
dc.description.abstractHydraulic systems are dynamically susceptible in the presence of entrapped air pockets, leading to amplified transient reactions. In order to model the dynamic action of an entrapped air pocket in a confined system, a heuristic mathematical formulation based on a conceptual analogy to a mechanical spring-damper system is proposed. The formulation is based on the polytropic relationship of an ideal gas and includes an additional term, which encompasses the combined damping effects associated with the thermodynamic deviations from the theoretical transformation, as well as those arising from the transient vorticity developed in both fluid domains (air and water). These effects represent the key factors that account for flow energy dissipation and pressure damping. Model validation was completed via numerical simulation of experimental measurements.pt_PT
dc.identifier.citationMARTINS, Sandra Carvalho; RAMOS, Helena Maria; ALMEIDA, António B. - Conceptual analogy for modelling entrapped air action in hydraulic systems. Journal of Hydraulic Research. ISSN 0022-1686. Vol. 53, N.º 5 (2015), pp. 678-686pt_PT
dc.identifier.doi10.1080/00221686.2015.1077353pt_PT
dc.identifier.issn0022-1686
dc.identifier.issn1814-2079
dc.identifier.urihttp://hdl.handle.net/10400.21/5694
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherTaylor & Francis LTDpt_PT
dc.relation.publisherversionhttp://www.tandfonline.com/doi/full/10.1080/00221686.2015.1077353pt_PT
dc.subjectDampingpt_PT
dc.subjectEntrapped airpt_PT
dc.subjectHydraulic transientpt_PT
dc.subjectPolytropic modelpt_PT
dc.subjectSpring-damper systempt_PT
dc.titleConceptual analogy for modelling entrapped air action in hydraulic systemspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage686pt_PT
oaire.citation.issue5pt_PT
oaire.citation.startPage678pt_PT
oaire.citation.titleJournal of Hydraulic Researchpt_PT
oaire.citation.volume53pt_PT
person.familyNamede Sousa Ramos
person.givenNameHelena Maria
person.identifier.orcid0000-0002-1291-3283
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationc73cdfd5-7295-4e1b-86c7-35dc62fa8fcf
relation.isAuthorOfPublication.latestForDiscoveryc73cdfd5-7295-4e1b-86c7-35dc62fa8fcf

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Conceptual analogy for modelling entrapped air action in hydraulic systems.pdf
Size:
1.08 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ISEL - Eng. Civil - Artigos