{"?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-1NC6FNOB/a293e079-6133-4169-8f16-b09556093b14/PDF","dcterms:extent":"2113 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-1NC6FNOB/b709b17c-9721-4fea-8cff-03c42d02b17f/TEXT","dcterms:extent":"37 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-1NC6FNOB","edm:isNextInSequence":{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:doc-FJ4EK6CL"},"dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-6QOUKQ9A"},{"@xml:lang":"sl","#text":"Strojniški vestnik"}],"dcterms:issued":"2015","dc:creator":["Hu, Caiqi","Hu, Xiaoqi","Ji, Jing","Li, Shengduo","Liu, Jude"],"dc:format":[{"@xml:lang":"sl","#text":"številka:12"},{"@xml:lang":"sl","#text":"letnik:61"},{"@xml:lang":"sl","#text":"str. 731-740, SI 132"}],"dc:identifier":["ISSN:0039-2480","COBISSID:14406427","URN:URN:NBN:SI:doc-1NC6FNOB"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Zveza strojnih inženirjev in tehnikov Slovenije et al."},"dc:subject":[{"@xml:lang":"sl","#text":"brezventilske piezoelektrične črpalke"},{"@xml:lang":"sl","#text":"mešanje"},{"@xml:lang":"sl","#text":"polja"},{"@xml:lang":"sl","#text":"pretok"},{"@xml:lang":"sl","#text":"skupina poloblastih segmentov"}],"dcterms:temporal":{"@rdf:resource":"1999-2025"},"dc:title":{"@xml:lang":"sl","#text":"Analysis of flow field and pumping performance for a valveless piezoelectric pump with a hemisphere-segment group|"},"dc:description":[{"@xml:lang":"sl","#text":"The pumping and mixing performance of a valveless piezoelectric pump were proposed and studied. A hemisphere-segment group that was fixed in the pump played the role of a valve. Based on the theoretical analysis of the pumping performance, the changes of the fluid velocity field, pressure difference, the coefficient of resistance and flow rate were simulated with FLUENT. Simulation results revealed the relationships among the pressure field, flow rates, row and column numbers, and row and column intervals of the hemisphere-segment group. The simulation results indicated that increasing row and column numbers, increasing row intervals, and decreasing column intervals could all increase the flow resistance difference in pump flow field and thus increased the flow rate. It was also found that the pumping effect was significantly improved by increasing row number than increasing column number; the increasing of row and column intervals could increase the size and strength of the vortex, and then improve the mixing and stirring performance of this pump. Finally, simulation results were tested and verified through pump flow-rate experiments"},{"@xml:lang":"sl","#text":"Prednost brezventilske piezoelektrične črpalke s skupinami poloblastih segmentov (VPPHSG) pred ostalimi brezventilskimi črpalkami je v preprosti zgradbi in v dobri izvedljivosti. Poloblasti segmenti (HS) pri VPPHSG so razporejeni tako, da delujejo kot ventil brez premikajočih se delov. Ko se fluid pretaka prek skupine poloblastih segmentov (HSG), nastanejo v interakciji fluida in poloblastih segmentov turbulence in vrtinci, ki ustvarijo zelo kompleksno pretočno polje in tlačne razlike. Te turbulence oziroma vrtinci povzročijo mešanje fluida in tlačno razliko, ki ustvari pretok skozi črpalko. Zato je pomembno poznavanje interakcij med parametri HSG in pretokom fluida za kvantifikacijo njihovega vpliva na pretočno polje črpalke in pretoke, ki je nujno pri snovanju in raziskavah tovrstnih brezventilskih črpalk. V dostopni literaturi ni bilo mogoče najti študij, ki bi kvantitativno opisovale razmerja med pretoki in konstrukcijskimi parametri črpalke, vključno z dimenzijami in razporeditvijo HSG"}],"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-1NC6FNOB","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:doc-1NC6FNOB"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:doc-1NC6FNOB/a293e079-6133-4169-8f16-b09556093b14/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-1NC6FNOB/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:doc-1NC6FNOB"}}}}