{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-K8UVH04P/9ea726da-f8d3-4011-a133-660a64fb65a3/PDF","dcterms:extent":"3346 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-K8UVH04P/8694c51a-8ad3-4150-8f45-45a79a86943a/TEXT","dcterms:extent":"39 KB"}],"edm:TimeSpan":{"@rdf:about":"1999-2025","edm:begin":{"@xml:lang":"en","#text":"1999"},"edm:end":{"@xml:lang":"en","#text":"2025"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:DOC-K8UVH04P","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-6QOUKQ9A"},{"@xml:lang":"sl","#text":"Strojniški vestnik"}],"dcterms:issued":"2016","dc:creator":["Gao, Bo","Li, Zhong","Ni, Dan","Yang, Minguan","Zhang, Ning"],"dc:format":[{"@xml:lang":"sl","#text":"letnik:62"},{"@xml:lang":"sl","#text":"številka:nr. 1"},{"@xml:lang":"sl","#text":"str. 21-31"}],"dc:identifier":["ISSN:0039-2480","COBISSID_HOST:14447131","URN:URN:NBN:SI:doc-K8UVH04P"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Zveza strojnih inženirjev in tehnikov Slovenije etc."},"dc:subject":[{"@xml:lang":"sl","#text":"centrifugalna črpalka"},{"@xml:lang":"sl","#text":"interakcije med rotorjem in statorjem"},{"@xml:lang":"sl","#text":"nestacionaren tok"},{"@xml:lang":"sl","#text":"simulacija velikih vrtincev"},{"@xml:lang":"sl","#text":"tlačni impulzi"},{"@xml:lang":"sl","#text":"vrtinčna struktura"}],"dcterms:temporal":{"@rdf:resource":"1999-2025"},"dc:title":{"@xml:lang":"sl","#text":"Investigation of rotor-stator interaction and flow unsteadiness in a low specific speed centrifugal pump|"},"dc:description":[{"@xml:lang":"sl","#text":"Instantaneous flow dynamics induced by rotor-stator interaction are detrimental to the stable operation of centrifugal pumps. In this study, unsteady rotor-stator interaction and flow structures within a low specific-speed centrifugal pump are analysed using the Large Eddy Simulation (LES) method. For that purpose, pressure pulsations and the evolution processes of vortical structures are combined to investigate rotor-stator interaction in order to clarify the inherent correlation between pressure amplitude and vorticity distribution. The results show that distinct peaks at blade passing frequency ( f BPF ) are closely associated with the positions of the monitoring point due to rotor-stator interaction. An unsteady vortical structure at the near tongue region is related to the relative position of the impeller with respect to the tongue, and the upstream effect of the volute tongue significantly affects the vorticity distribution on the blade pressure side. Rotor-stator interaction is dominated by vortex shedding in the wake of the blade trailing edge and their impingement on the volute tongue with subsequent cutting and distortion. Moreover, the high-pressure amplitude is generated with the corresponding high vorticity magnitude observed as well. Therefore, it is confirmed that pressure amplitude is significantly associated with the corresponding vorticity magnitude"},{"@xml:lang":"sl","#text":"Nestacionarni tlačni impulzi zaradi interakcij med fluidom in konstrukcijo pomembno vplivajo na stabilno in varno delovanje centrifugalnih črpalk. Zaradi intenzivne interakcije med kolesom in ohišjem (rotorjem in statorjem) nastajajo močne vibracije, ki lahko nepričakovano poškodujejo mehanske komponente. Zato je nujna analiza nestacionarnih tokovnih struktur, še posebej porazdelitve vrtincev v črpalki, za pojasnitev vpliva dinamike odlepljanja vrtincev na sprednjem robu lopatice na tlačne impulze. Predstavljena študija analizira nestacionarno interakcijo rotorja in statorja pri centrifugalni črpalki z majhno specifično hitrostjo. Pridobljeni so bili signali tlačnih impulzov skupaj s porazdelitvijo vrtincev. Posebna pozornost je bila posvečena odlepljanju vrtinčastih struktur v vrtinčni sledi na sprednjem robu lopatice ter interakciji z jezikom ohišja. Podrobno je bila analizirana evolucija vrtinčnih struktur v okolici jezika in v kanalu lopatice. Namen tega dela je ugotovitev povezav med tlačnimi impulzi in nestacionarnimi tokovnimi strukturami"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:DOC-K8UVH04P","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-K8UVH04P"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-K8UVH04P/9ea726da-f8d3-4011-a133-660a64fb65a3/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Univerza v Ljubljani, Fakulteta za strojništvo"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:DOC-K8UVH04P/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-K8UVH04P"}}}}