Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
CONDENSATION AND NORMAL SHOCKWAVE LOCATION IN SUPERSONIC NOZZLES
Submission Author:
Andres Acosta , SP
Co-Authors:
Andres Acosta, Cláudio Rodrigues, Julian Camilo Restrepo Lozano, José Roberto Simões Moreira
Presenter: Andres Acosta
doi://10.26678/ABCM.COBEM2019.COB2019-1180
Abstract
One of the most promising techniques for gas dehydration is the supersonic separation, which consists of the expansion of a fluid in a convergent-divergent nozzle, as the temperature falls due to the isentropic expansion, condensation or solidification occurs. A theoretical quasi one- dimensional pure substance model is built from the residual thermodynamic property theory based on the Van der Waals and Peng-Robinson equations, allowing to determine the thermodynamic properties in the nozzle. Compressible flow relations are also implemented in order to obtain the isentropic expansionandnormalshocklocationinthenozzleflow. Finally, the binodal, spinodalandWilsonlinesarecalculatedfor the Peng-Robinson equation aiming to determine the condensation shock for carbon dioxide. The results of the model are compared to the numerical available on the literature, having a good agreement in ideal and at very close to the critical conditions.
Keywords
Compressible flow, converging-diverging nozzle, cubic eos
