Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
An experimental method for the study of oscillations of pipes carrying liquid and gas mixtures in slug flow pattern
Submission Author:
Sergio Bordalo , SP
Co-Authors:
Sergio Bordalo, Celso Morooka, Caio Cesar de Oliveira Trigo
Presenter: Celso Morooka
doi://10.26678/ABCM.ENCIT2022.CIT22-0137
Abstract
In this paper, the results of an experimental study on a laboratory model of a submersed suspended flexible pipe oscillating due to the internal two-phase slug flow of liquid and gas are presented. The slug flow was produced by injection of sixteen combinations of water and air into the pipe, which was set in catenary configuration inside a water tank with a depth of two meters. The oscillation of the pipe was recorded by cameras registering the position of targeted points on the body of the pipe, providing the time-history of the movement of the pipe. The flow rates of both phases were measured, as well as the speed of the slugs and their frequencies, leading to the evaluation of their lengths and hold-ups, and assessment of the fluid loads applied to the pipe due to gravity and curvature. The amplitudes and frequencies of oscillations of the pipe were obtained processing the video images of the pipe movement. The methodology developed here may be used for numerous geometries and flow states, and it should be useful for validations of numerical simulations of pipe excitation through the comparison between experimental data and computer calculations. The application to offshore pipes in operations, carrying oil and gas from petroleum reservoirs submarine wells to floating facilities in the ocean, may be obtained by the proper scaling up in conjunction with computer simulations.
Keywords
Offshore, Risers, Oscillations, Slug Flow, Experimental Studies
