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Statements

Subject Item
n2:RIV%2F00216305%3A26210%2F02%3APU30738%21RIV07-GA0-26210___
rdf:type
n16:Vysledek skos:Concept
dcterms:description
Při modelování vysokofrekvenčních pulsací je rozhodující tlumící schopnost. Dosud se předpokládalo, že tlumení je dáno pouze první viskozitou nebo kvadrátem průtoku. V článku je popsán model tlumení zahrnující účinky druhé viskozity. Druhá viskozita byla experimentálně zjištěna v laboratořích odboru Fluidního inženýrství Victora Kaplana Vysokého učení technického v Brně. Matematický model systému s hydraulickým strojem (vodní turbínou), rovným potrubím a uzly reprezentoval rozváděcí kolo, spirální těleso a přivaděč. At the modeling of high-frequency pressure oscillations the damping function is decisive. Up to now it was assumed that the damping is given by the first or the second power of discharge. In this paper the damping model including the influence of fluid second viscosity is described. The second viscosity has been experimentally determined at the Hydraulic laboratory of the University of Technology in Brno, Czech Republic. The mathematical model of the system with hydraulic machine (water turbine) consists of straight pipes and nodes, where the straight pipes represent distributor channels, spiral case and penstock. At the modeling of high-frequency pressure oscillations the damping function is decisive. Up to now it was assumed that the damping is given by the first or the second power of discharge. In this paper the damping model including the influence of fluid second viscosity is described. The second viscosity has been experimentally determined at the Hydraulic laboratory of the University of Technology in Brno, Czech Republic. The mathematical model of the system with hydraulic machine (water turbine) consists of straight pipes and nodes, where the straight pipes represent distributor channels, spiral case and penstock.
dcterms:title
1-D Mathematical model of high-frequency pressure oscillations induced by RSI including an influence of fluid second viscosity 1-D matematický model vysokofrekvenčních pulsací buzených RSI s vlivem druhé viskozity 1-D Mathematical model of high-frequency pressure oscillations induced by RSI including an influence of fluid second viscosity
skos:prefLabel
1-D matematický model vysokofrekvenčních pulsací buzených RSI s vlivem druhé viskozity 1-D Mathematical model of high-frequency pressure oscillations induced by RSI including an influence of fluid second viscosity 1-D Mathematical model of high-frequency pressure oscillations induced by RSI including an influence of fluid second viscosity
skos:notation
RIV/00216305:26210/02:PU30738!RIV07-GA0-26210___
n3:strany
735-740
n3:aktivita
n19:P
n3:aktivity
P(GA101/01/0580)
n3:dodaniDat
n15:2007
n3:domaciTvurceVysledku
n4:8829179 n4:3612015 n4:6210120
n3:druhVysledku
n17:D
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n21:predkladatel
n3:idSjednocenehoVysledku
671820
n3:idVysledku
RIV/00216305:26210/02:PU30738
n3:jazykVysledku
n13:eng
n3:klicovaSlova
oscillations, viscosity
n3:klicoveSlovo
n5:oscillations n5:viscosity
n3:kontrolniKodProRIV
[2CC3A3E909C5]
n3:mistoKonaniAkce
Lausanne
n3:mistoVydani
Lausanne
n3:nazevZdroje
Hydraulic Machinery and Systems
n3:obor
n20:BK
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n11:GA101%2F01%2F0580
n3:rokUplatneniVysledku
n15:2002
n3:tvurceVysledku
Koutník, Jiří Pochylý, František Habán, Vladimír
n3:typAkce
n10:WRD
n3:zahajeniAkce
2002-09-09+02:00
s:numberOfPages
6
n9:hasPublisher
ÉCOLE POLYTECHNIQUE FÉDÉRALE OF LAUSANNE
n12:isbn
3-85545-865-0
n18:organizacniJednotka
26210