Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
SEPARATION EFFICENCY ANALYSIS OF A SUPERSONIC SEPARATOR NOZZLE WITH CENTRAL BODY
Submission Author:
Thomaz Faccioli , SP
Co-Authors:
Thomaz Faccioli, Reinaldo Marcondes Orselli, Ricardo Galdino da SIlva, Denis Fernando Gregório Júnior, Bruno Carmo
Presenter: Thomaz Faccioli
doi://10.26678/ABCM.COBEM2023.COB2023-0975
Abstract
The supersonic gas separator is a new technology that uses the processes of supersonic expansion and cyclonic separation to remove water and condensates, such as CO2, from natural gas. The objective of this study is to perform CFD simulations with particles injection known as DPM (Discrete Phase Method) to investigate the effect of the centrifugal force on the separation efficiency of such device. For the supersonic separator geometry, the configuration is considered with central body, specially designed to increase the separation efficiency. The supersonic device is formed by a converging-diverging section in which the flow is accelerated to supersonic speed in the nozzle, followed by a diffuser where a train of shock waves occurs, and static pressure is recovered. The process of separation occurs by supersonic expansion, which decreases the gas temperature such that some components (particularly CO2) are condensed; in turn, the liquid droplets formed are separated from the gas being conducted by centrifugation towards downstream collectors installed on the nozzle walls. Among the numerical simulations carried out, for a centrifugal acceleration of 350,000 g, the highest separation efficiency obtained was 98%.
Keywords
Computational Fluid Dynamics, natural gas, Shock wave, supersonic separator, Discrete Phase Model
