674 KB0 KB201320252022Bergant, AntonPekolj, JoštPerpar, Matjažletnik:15številka:iss. 2str. 21-30COBISSID_HOST:126541827ISSN:1855-5748URN:URN:NBN:SI:doc-HJJ00ZVPenFakulteta za energetikoJET on-lineJournal of energy technologyair pocketsanalitične rešitveanalytical solutionscevovodimethod of characteristicsmetoda karakteristikpipelinesprehodni tlakitransient pressureszračni žepiAnalytical and numerical analysis of trapped air pocket dynamic response due to pressure change in liquid-filled pipelines| Analitična in numerična analiza dinamičnega odziva zračnega mehurja na tlačno motnjo v cevovodih, napolnjenih z vodo|This paper serves as an overview of the different approaches to modelling the filling and empty ing of liquid-filled pipelines. Specifically, it compares an analytical and numerical analysis of the start-up of a liquid column in a one-dimensional pipeline with a trapped air pocket. The analytical analysis is based on the premise that there are no pressure waves travelling in the water column. For this reason, it is not suitable for pipeline systems with very small initial trapped air pockets or very high reservoir pressures. In the pipelines with parameters, as shown in this paper, the results of the analytical analysis correlate sufficiently with those of the numerical analysisTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Mariboru, Fakulteta za energetiko