Computational Fluid Dynamics Study for Flow of Natural Gas through High-pressure Supersonic Nozzles: Part 2. Nozzle Geometry and Vorticity

2008 ◽  
Vol 26 (15) ◽  
pp. 1773-1785 ◽  
Author(s):  
E. Jassim ◽  
M. Abedinzadegan Abdi ◽  
Y. Muzychka
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Pressure ◽  
Natural Gas ◽  
Nozzle Geometry ◽  
Supersonic Nozzles

scholarly journals Effect of geometrical factors interactions on design optimization process of a natural gas ejector

2019 ◽  
Vol 11 (9) ◽  
pp. 168781401988036
Author(s):  
Amin Hassan Amin ◽  
Ibrahim Elbadawy ◽  
E Elgendy ◽  
M Fatouh
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Natural Gas ◽  
Optimum Design ◽  
Average Error ◽  
Minor Effect ◽  
Optimization Approach ◽  
Entrainment Ratio ◽  
Geometrical Factors ◽  
Discharge Pressure

Enhancing the ejector entrainment ratio plays an important role in the ejector performance. In this article, a surrogate-based optimization approach along with computational fluid dynamics technique has been employed to optimize the entrainment ratio of a single-phase ejector working with natural gas. Nine ejector geometrical factors have been varied to maximize the ejector entrainment ratio. Validation results of the presented computational fluid dynamics model were in a good agreement with the experimental data from the literature with an average error of 0.6% in the critical mode. Reported results showed that the optimum design achieves entrainment ratio of 19.45% at 12, 2, and 5.2 MPa motive pressure, induced pressure, and discharge pressure, respectively. Moreover, the primary nozzle convergent angle and throat length are insignificant factors. Furthermore, secondary nozzle inclination angle has a minor effect on the entrainment ratio of the optimum design.

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