ANALYTICAL EXPRESSIONS FOR LIQUID-COLUMN VELOCITIES IN PIPELINES WITH ENTRAPPED GAS


Tijsseling A. S. , Hou Q., BOZKUŞ Z.

ASME Pressure Vessels and Piping Conference, PVP-2015, Massachusetts, United States Of America, 19 - 23 July 2015 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • Doi Number: 10.1115/pvp2015-45184
  • City: Massachusetts
  • Country: United States Of America
  • Keywords: mass oscillation, gas spring, entrapped gas, column separation, liquid slug, pipe filling, analytical solution, WATER-HAMMER, AIR POCKET

Abstract

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.