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Numerical simulation of a supersonic ejector for vacuum generation with explicit and implicit solver in openfoam
dc.contributor.author | Macià Cid, Llorenç |
dc.contributor.author | Castilla López, Roberto |
dc.contributor.author | Gámez Montero, Pedro Javier |
dc.contributor.author | Camacho, Sergi |
dc.contributor.author | Codina Macià, Esteban |
dc.contributor.other | Universitat Politècnica de Catalunya. Doctorat en Enginyeria Mecànica, Fluids i Aeronàutica |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Mecànica de Fluids |
dc.date.accessioned | 2020-02-10T08:50:58Z |
dc.date.available | 2020-02-10T08:50:58Z |
dc.date.issued | 2019-09-17 |
dc.identifier.citation | Macià, L. [et al.]. Numerical simulation of a supersonic ejector for vacuum generation with explicit and implicit solver in openfoam. "Energies", 17 Setembre 2019, vol. 12, núm. 18, p. 3553:1-3553:17. |
dc.identifier.issn | 1996-1073 |
dc.identifier.uri | http://hdl.handle.net/2117/177261 |
dc.description.abstract | Supersonic ejectors are used extensively in all kind of applications: compression of refrigerants in cooling systems, pumping of volatile fluids or in vacuum generation. In vacuum generation, also known as zero-secondary flow, the ejector has a transient behaviour. In this paper, a numerical and experimental research of a supersonic compressible air nozzle is performed in order to investigate and to simulate its behaviour. The CFD toolbox OpenFOAM 6 was used, with two density-based solvers: explicit solver rhoCentralFoam, which implements Kurganov Central-upwind schemes, and implicit solver HiSA, which implements the AUSM+up upwind scheme. The behaviour of the transient evacuation ranges between adiabatic polytropic exponent at the beginning of the process and isothermal at the end. A model for the computation of the transient polytropic exponent is proposed. During the evacuation, two regimes are encountered in the second nozzle. In the supercritic regime, the secondary is choked and sonic flow is reached. In the subcritic regime, the secondary flow is subsonic. The final agreement is good with the two different solvers, although simulation tends to slightly overestimate flow rate for large values region. |
dc.language.iso | eng |
dc.subject | Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids |
dc.subject.lcsh | Aerodynamics, Supersonic |
dc.subject.lcsh | Fluid dynamics --Computer simulation |
dc.subject.other | Supersonic vacuum ejector |
dc.subject.other | vacuum generator |
dc.subject.other | open source |
dc.subject.other | Python |
dc.subject.other | computational fluid dynamics |
dc.subject.other | CFD |
dc.subject.other | compressible density-based |
dc.subject.other | HiSA |
dc.subject.other | rhoCentralFoam |
dc.subject.other | OpenFOAM |
dc.title | Numerical simulation of a supersonic ejector for vacuum generation with explicit and implicit solver in openfoam |
dc.type | Article |
dc.subject.lemac | Aerodinàmica supersònica |
dc.subject.lemac | Dinàmica de fluids -- Simulació per ordinador |
dc.contributor.group | Universitat Politècnica de Catalunya. LABSON - Laboratori de Sistemes Oleohidràulics i Pneumàtics |
dc.contributor.group | Universitat Politècnica de Catalunya. IAFARG - Industrial and Aeronautical Fluid-dynamic Applications Research Group |
dc.identifier.doi | 10.3390/en12183553 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | https://www.mdpi.com/1996-1073/12/18/3553 |
dc.rights.access | Open Access |
local.identifier.drac | 25876038 |
dc.description.version | Postprint (published version) |
local.citation.author | Macià, L.; Castilla, R.; Gamez-Montero, P.J.; Camacho, S.; Codina-Macia, Esteban |
local.citation.publicationName | Energies |
local.citation.volume | 12 |
local.citation.number | 18 |
local.citation.startingPage | 3553:1 |
local.citation.endingPage | 3553:17 |
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