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dc.contributor.authorRío Cano, Carlos
dc.contributor.authorMonshi Tousi, Navid
dc.contributor.authorBergadà Granyó, Josep Maria
dc.contributor.authorComas Amengual, Ángel
dc.contributor.otherUniversitat Politècnica de Catalunya. Doctorat en Enginyeria Mecànica, Fluids i Aeronàutica
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Mecànica de Fluids
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.identifier.citationRio, C. [et al.]. Discharge coefficients of a heavy suspension nozzle. "Applied sciences", 15 Març 2021, vol. 11, núm. 6, p. 2619:1-2619:19.
dc.description.abstractThe suspensions used in heavy vehicles often consist of several oil and two gas chambers. In order to perform an analytical study of the mass flow transferred between two gas chambers separated by a nozzle, and when considering the gas as compressible and real, it is usually needed to determine the discharge coefficient of the nozzle. The nozzle configuration analyzed in the present study consists of a T shape, and it is used to separate two nitrogen chambers employed in heavy vehicle suspensions. In the present study, under compressible dynamic real flow conditions and at operating pressures, discharge coefficients were determined based on experimental data. A test rig was constructed for this purpose, and air was used as working fluid. The study clarifies that discharge coefficients for the T shape nozzle studied not only depend on the pressure gradient between chambers but also on the flow direction. Computational Fluid Dynamic (CFD) simulations, using air as working fluid and when flowing in both nozzle directions, were undertaken, as well, and the fluid was considered as compressible and ideal. The CFD results deeply helped in understanding why the dynamic discharge coefficients were dependent on both the pressure ratio and flow direction, clarifying at which nozzle location, and for how long, chocked flow was to be expected. Experimentally-based results were compared with the CFD ones, validating both the experimental procedure and numerical methodologies presented. The information gathered in the present study is aimed to be used to mathematically characterize the dynamic performance of a real suspension
dc.description.sponsorshipIM-2020-1-0001 Optimization of five Active Flow Control parameters on a SD7003 wing profile at several angles of attack from 4 to 16 and at Reynolds number 60000 (second period)
dc.rightsAttribution 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
dc.subject.lcshFluid dynamics
dc.subject.lcshComputational fluid dynamics
dc.subject.lcshHeavy vehicles
dc.subject.otherDischarge coefficients
dc.subject.otherReal compressible flow
dc.subject.otherComputational Fluid Dynamics (CFD)
dc.subject.otherChocked flow
dc.subject.otherAnalytical solutions based on experimental data
dc.titleDischarge coefficients of a heavy suspension nozzle
dc.subject.lemacDinàmica de fluids
dc.subject.lemacDinàmica de fluids computacional
dc.subject.lemacVehicles pesants
dc.contributor.groupUniversitat Politècnica de Catalunya. IAFARG - Industrial and Aeronautical Fluid-dynamic Applications Research Group
dc.contributor.groupUniversitat Politècnica de Catalunya. TUAREG - Turbulence and Aerodynamics in Mechanical and Aerospace Engineering Research Group
dc.contributor.groupUniversitat Politècnica de Catalunya. LABSON - Laboratori de Sistemes Oleohidràulics i Pneumàtics
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorRio, C.; Monshi Tousi, N.; Bergadà, J.M.; Comas, A.
local.citation.publicationNameApplied sciences

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Attribution 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution 3.0 Spain