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Design of a Large and Versatile Two-Phase Flow Facility for Transient Studies in Pipes

[+] Author Affiliations
Geanette Polanco

UiT, Arctic University of Tromso, Narvik, Norway

José Da Paixao, Antonio Vidal, Orlando Aguillón

Simon Bolivar University, Caracas, Venezuela

Paper No. IMECE2016-66740, pp. V007T09A002; 8 pages
doi:10.1115/IMECE2016-66740
From:
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 7: Fluids Engineering
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5061-9
  • Copyright © 2016 by ASME

abstract

Frequent interruptions of pipe flows is a common situation that has to be addressed by the industry working with single and two-phase flows. These interruptions generate abrupt changes in speed and therefore changes in the pressure inside the process pipe that could create major hazardous operating conditions or even produce system failures. In terms of two-phase or multiphase flow phenomenon, there is a real need for experimental data to support the increasing concern about determining reliability of pipe system, as well as, risk assessment concerning environmental hazards due to pipe system failures. Here after, the design and construction of a large and versatile test facility to study transient performance after a rapid closure occurs, is presented. The final goal of this facility is to create the possibility of having a database corresponding to the phenomenon known as water hammer for both single and two-phase flow. Different two-phase flow patterns can be simulated for the test. The facility is located on the premises of the Laboratory of Conversion of Mechanical Energy of the Simon Bolivar University, Caracas, Venezuela (LABCEM-USB). The facility consists of an instrumented closed flow loop that works with water and air at distinct flow proportions. The facility can be described as a group of seven interconnected sub-systems or modules that connect all the required capabilities. The Sub-systems are: liquid system, gas system, mixing system, pneumatic system, instrumentation system, electrical system and the test section. This modular design allows identification of the main components as individual subtask for the designing process. The test section is made in transparent material for visualization and it can be modified into different geometrical arrangements or configurations using different angles of inclination. Both static and dynamic pressure before and after an imminent closing of the valves for specific conditions of flow. The capability of selection of the inclination and the geometrical configuration of the test section (inverted “U” shape or linear pipe section) makes a unique air/water two-phase flow facility. The design represents a compact but versatile capability for evaluating test sections from a horizontal to a vertical position of the pipe. Initial results presented here show the pressure level achieved for different configurations.

Copyright © 2016 by ASME

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