Boş Bir Boru Sisteminde Değişken Akımlı Bir Su Kütlesinin Paketinin Hidrodinamiği

Liquid slugs (water pockets) are propelled into an empty pipe under various driving pressures; the pipe's extension ends at an elbow whereon the slugs impact and disintegrate. Dynamic pressures recorded at various locations along the system indicate the complex and somewhat random structure of the transient. High-speed movies of the evolving slug just prior to impact show that significant air entrainment and breakup of the slug occurs. A simplified analytical model is developed to predict the slug dynamics; in spite of the complexity of the flow, reasonable comparisons of peak pressures and impulse loads at the elbow are obtained and are in parallel with results reported in an earlier study.
Turkish Journal of Engineering and Environmental Sciences


Prediction of Pressure Variation at an Elbow Subsequent to a Liquid Slug Impact by Using Smoothed Particle Hydrodynamics
DİNÇER, Ali Ersin; Bozkuş, Zafer; TIJSSELING, A. S. (2018-06-01)
Liquid slug flow driven by pressurized air in an inclined pipe with a downstream elbow is investigated numerically. As the liquid slug hits the elbow, the impact pressure and the associated force generated at the elbow may damage pipe supports as well as the pipe itself. It is essential for the design engineers of pipeline systems to accurately predict the pressure trace during the impact for safe operation. The slug arrival velocity and slug length (i.e., mass) at the elbow directly affect that pressure. I...
Analytical Solutions for Liquid Slugs and Pigs Traveling in Pipelines with Entrapped Gas
TİJSSELİNG, Arris S; QİNGZHİ, Hou; Bozkuş, Zafer (2017-07-20)
Liquid slugs have a relatively low mass and can therefore when they occupy a full cross-section of a pipeline be accelerated to very high velocities by means of pressurized gas. When entrapped gas pockets are present, pressures and temperatures may become dangerously high. Simple models and analytical solutions are derived and used to predict transient velocities, pressures and temperatures. The models have a generic character as they also describe the basics of breaking surface waves impacting on a wall, a...
Tijsseling, Arris S.; Hou, Qingzhi; Bozkuş, Zafer (2015-01-01)
High pressures and high temperatures may arise in pipelines when a liquid column is suddenly accelerated into a gas pocket trapped at a closed end. A mass oscillation occurs that is described by nonlinear equations for both liquid and gas. Analytical expressions are derived for the uniform velocity of the liquid column, from which pressures and gas temperatures follow. The obtained results are validated against theoretical and experimental results published by fellow researchers.
Modelling of interaction of shock waves with analytical methods
Koç, Mesut; Aksel, Mehmet Haluk; Department of Mechanical Engineering (2022-2)
In supersonic air vehicles, specially shaped air ducts are used to supply the air with required properties to the combustion chambers. Two-dimensional supersonic flow solvers used to design such geometrical shapes have become less accurate as the geometrical shape of the air duct becomes asymmetric or flow becomes three-dimensional. This problem can be overcome by solving the interaction between shock planes using analytical methods. In this study, an analytical solution model based on principles of gas dyn...
Modelling reinjection of two-phase non-condensable gases and water in geothermal wells
Leontidis, Vlasios; Niknam, Pouriya H.; Durgut, Ismail; Talluri, Lorenzo; Manfrida, Giampaolo; Fiaschi, Daniele; Akın, Serhat; Gainville, Martin (2023-03-01)
Steam production from high enthalpy geothermal systems is frequently accompanied by the emission of non-condensable gases (NCGs), initially dissolved in the liquid phase or mixed in the vapour phase at depth in the reservoir. Capturing and reinjecting geothermal gases (CO2, CH4, NH3, H2S, H2, …) together with condensed steam leads to a significant improvement of the environmental profile of geothermal power systems and helps with reservoir recharge and pressure support. Nowadays, there are several ongoing p...
Citation Formats
Z. Bozkuş, “Boş Bir Boru Sisteminde Değişken Akımlı Bir Su Kütlesinin Paketinin Hidrodinamiği,” Turkish Journal of Engineering and Environmental Sciences, pp. 269–277, 1995, Accessed: 00, 2021. [Online]. Available: