Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
An experimental investigation on the two-phase intermittent flow coupling with structural vibration of horizontal pipes
Submission Author:
Adriano Todorovic Fabro , DF , Brazil
Co-Authors:
Daniely Amorim das Neves, Adriano Todorovic Fabro, Saon Vieira, Juliana Cenzi, Rafael Franklin Lazaro de Cerqueira, Marcelo Souza de Castro
Presenter: Adriano Todorovic Fabro
doi://10.26678/ABCM.COBEM2023.COB2023-1988
Abstract
Two-phase flow is typically found in several industrial applications, such as in the production and transportation of oil and gas in the petrochemical industry, in the catalytic cracking and microreactors in the chemical industry, and in nuclear reactor cooling pumps. Measurement of two-phase flow features is usually necessary and has been done in several ways, including pressure probes, resistive sensors, gamma-ray, wire-mesh sensor and many others. However, these are either intrusive or invasive techniques, which might be of challenging application in industrial environments, or rely on a radioactive source. Vibration-based measurement of two-phase flow in pipes stands out as a non-invasive/non-intrusive approach and, consequently, multiphase-flow induced vibration in pipes has receiving increasing attention in recent years. In this work, the dynamic behaviour of a horizontal tube conveying a two-phase gas-liquid flow is characterised based on indirect approaches, focusing on intermittent patterns. The phenomenon of fluid-structure coupling is investigated using acceleration and pressure measurement. An approach based on the estimation of frequency response function of the pressure and vibration at the liquid piston and Taylor bubble is proposed. The estimated coherence function can used as quantitative measure of the coupling. It is shown that there is a great vibration amplification at the cut-on frequencies of circumferential wave modes in pipes due to the corresponding structural wave and pressure coupling. The experimental results pave the way for innovative vibration-based measurement approaches.
Keywords
multiphase flow, flow-induced vibration, pipe acoustics
