In this paper, the hydrodynamics of a single transient slug in a voided line was investigated numerically and experimentally. In the experiments, the liquid slugs of various lengths were propelled into an inclined smooth steel pipe under several different driving air pressures. The pipe segment terminates in an open ended elbow; the pressure time histories are recorded at this elbow. The recorded peak pressures are correlated to the tank pressures and pipe and slug geometry. Dimensionless parameters are developed to present the experimental data. Moreover, the flow is investigated numerically using several Godunov type schemes, namely, basic Godunov Scheme, Total Variation Diminishing (TVD), based Weighted Average Flux (WAF) method and two different Monotone Upstream Schemes for Conservation Laws (MUSCL) methods. These schemes employ Godunov’s approach facilitating exact and Harten, Lax and van Leer’s modified approximate solver (HLLC) type solution methods solving the Riemann problem of gas dynamics equations. Furthermore, the recorded peak pressures at the elbow are compared with the results of the numerical analysis and results of two earlier studies.

Issue Section:
Technical Papers
Keywords:
pipe flow, voids (solid), hydrodynamics, steel, high-pressure techniques, geometry, pipelines, power plants
Topics:
Pipes, Pressure, Slug flows
1.
Fenton, R. M., 1989, “The Forces at a Pipe Bend Due to the Clearing of Water Trapped Upstream,” Master thesis, Department of Mechanical Engineering, Massachusetts Institute of Technology.
2.
Fenton, R. M., and Griffith, P., 1990, “The Force at a Pipe Bend Due to the Clearing Of Water Trapped Upstream,” Transient Thermal Hydraulics and Resulting Loads on Vessel and Piping Systems, PVP, ASME, New York, 190, pp. 59–67.
3.
Bozkus, Z., 1991, “The Hydrodynamics of an Individual Transient Slug in a Voided Line,” Ph.D. dissertation, Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, USA.
4.
Bozkus, Z., and Wiggert, D. C., 1991, “Slug Motion and Impact in a Voided Line,” Fluid Transients and Fluid Structure Interaction, D.C. Wiggert and F. J. Moody eds., Vol. 224/FED-Vol. 126, ASME, New York, pp. 25–27.
5.
Bozkus, Z., and Wiggert, D. C., 1992, “Hydromechanics of Slug Motion in a Voided Line,” Unsteady Flow and Fluid Transients, R. Bettess and J. Watts, eds., A. A. Balkema, Rotterdam, pp. 77–86.
6.
Bozkus
,
Z.
, and
Wiggert
,
D. C.
,
1997
, “
Liquid Slug Motion in a Voided Line
,”
J. Fluids Struct.
,
11
, pp.
947
–
963
.
7.
Neumann, A., and Griffith, P., 1992, “Forces on a Pipe Bend Resulting from Clearing a Pool of Liquid Upstream,” Transient Thermal-Hydraulics and Structural Mechanics, ASME PVP Vol. 231, ASME, New York.
8.
Yang
,
J.
, and
Wiggert
,
D. C.
,
1998
, “
Analysis of Liquid Slug Motion in a Voided Line
,”
ASME J. Pressure Vessel Technol.
,
120
, pp.
74
–
80
.
9.
Baran, O¨zgu¨r Ugˇras¸, 1999, “Experimental and Numerical Analysis of the Liquid Slug Motion in a Voided Line,” M.Sc. thesis, Department of Civil Engineering, Middle East Technical University, Ankara, Turkey.
10.
Wylie, E. B., and Streeter, V. L., 1984, Fluid Transients, FEB Press.
11.
Daugherty, R. L., Franzini, J. B., and Finnemore, E. J., 1985, Fluid Mechanics with Engineering Applications, McGraw-Hill.
12.
Eleuterio, F., and Eleuterio, F.T., 1997, Rieman Solvers and Numerical Methods for Fluid Dynamics: A Practical Introduction, Springer-Verlag, Heidelberg-Berlin, pp. 87–89.
13.
Izenson, G. M., and Rothe, H. P., 1988, “Waterhammer due to Liquid Slugs in RCS Vent Lines,” TM-1257, Technical Memorandum prepared for CREARE Inc., Hanover, NH.
14.
Taylor, G. I., 1963, “The Instability of Liquid Surfaces When Accelerated in a Direction Perpendicular to Their Planes,” The Scientific Papers of G. I. Taylor, Vol. 3, Cambridge University Press.
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