Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
GAS ENTRAINMENT PHENOMENON INSIDE AN INVERTED-SHROUD GAS SEPARATOR
Submission Author:
Marcel Cavallini Barbosa , SP
Co-Authors:
Marcel Cavallini Barbosa, L. Enrique Ortiz-Vidal, Valdir Estevam, Ricardo Minette, Oscar Mauricio Hernandez Rodriguez
Presenter: Marcel Cavallini Barbosa
doi://10.26678/ABCM.ENCIT2016.CIT2016-0675
Abstract
The Inverted-Shroud (IS) separator is a promising solution for gas-liquid separation in the oil and gas industry. The IS separator combines high gas separation efficiency with the inexistence of moving mechanical parts. It consists of a closed-end tube (shroud) located between the production pipe (tubing) and the well casing. Experimental studies on the IS separator suggest that gas separation efficiency is affected by air entrainment inside the apparatus, where liquid in a free-surface flow impacts the internal liquid surface and carries with it gas that is entrained and disperses into bubbles due to turbulent kinetic energy dissipation. According to phenomenological models from the literature, the prediction of the energy dissipation rate correlates with the entrained bubble size, among other factors. The purpose of this paper is to study the gas entrainment phenomenon on the IS separator. First, a review of the current state-of-the-art research for a similar geometry is presented. Then, a comparison between experimental bubble size and predictions is performed. Bubble size distributions were obtained with a 3-D Optical Reflectance Measurement (ORM) probe installed in an experimental IS-separator test section. Different methods of average diameter (Sauter, mean, median and maximum size) are used to determine which best adjusts to the models’ predictions. Results will improve the understanding of the IS separator and make possible the enhancement of its current modeling.
Keywords
Air entrainment, gas-liquid separation, plunging liquid jet, Bubble size, Inverted-Shroud, Air entrainment, gas-liquid separation, plunging liquid jet, Bubble size, Inverted-Shroud, Air entrainment, gas-liquid separation, plunging liquid jet, Bubble size, Inverted-Shroud
