A master thesis from Aalborg University
Modelling of a Two Phase Water Hammer
Term
4. term
Education
Publication year
2018
Submitted on
2018-06-06
Pages
149 pages
Abstract
A two phase water hammer has been simulated with Method of Characteristics (MOC) and Computational Fluid Dynamics (CFD). MOC is performed in 1D with the Discrete Vapour Cavity Model (DVCM) and the Discrete Gas Cavity Model (DGCM). The CFD model is performed in 2D with an axisymmetric pipe. MOC and CFD are compared with 4 different experiments found from literature, which covers a range of different dimensions and flow conditions. The Rayleigh-Plesset equation was investigated with the purpose of implementation in MOC, but because of time step size complications and time limitations, this did not succeed. DGCM was found as the overall best two phase water hammer model, as it gave an accurate estimation of the pressure, robustness with large void fractions, and an accurate estimation of the timing of the oscillation.
Keywords
MOC ; CFD ; Water Hammer ; to-fase ; Two phase
Documents
Colophon: This page is part of the AAU Student Projects portal, which is run by Aalborg University. Here, you can find and download publicly available bachelor's theses and master's projects from across the university dating from 2008 onwards. Student projects from before 2008 are available in printed form at Aalborg University Library.
If you have any questions about AAU Student Projects or the research registration, dissemination and analysis at Aalborg University, please feel free to contact the VBN team. You can also find more information in the AAU Student Projects FAQs.