Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/17674
Title: Fluid Transients in Complex Systems with Air Entrainment
Authors: NGUYEN DINH TAM
Keywords: Pressure transient, Air entrainment, Variable wave speed, Check valve, Method of Characteristics, Pipeline
Issue Date: 7-Aug-2009
Source: NGUYEN DINH TAM (2009-08-07). Fluid Transients in Complex Systems with Air Entrainment. ScholarBank@NUS Repository.
Abstract: This thesis presents a variable wave speed model for the calculation of fluid transients in pipelines with air entrainment. We improve fluid transient modeling by introducing the variable wave speed model: the wave speed is calculated depending on the local pressure and local air void fraction. We also model free gas in the fluid and released/absorbed gas from gaseous cavitation at the fluid vapor pressure. The variable wave speed model can improve the simulation of experimental observations in terms of shape of the pressure peaks, the frequency of the oscillations and the rate of decay over the standard constant wave speed model. A set of experiments were carried out in a single pump pipeline system to test the fluid transient behaviour for the case of pump trip due to power failure and to validate the numerical model. The numerical results from the variable wave speed model were in good agreement with the experimental result. The variable wave speed model was then applied to investigate the fluid transient with air entrainment in the pumping system. We also study experimentally the check valve performances in fluid transients with air entrainment.
URI: http://scholarbank.nus.edu.sg/handle/10635/17674
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
NguyenDT.PDF1.81 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

445
checked on Dec 11, 2017

Download(s)

1,648
checked on Dec 11, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.