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

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 ga...

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Bibliographic Details
Published in:Advances in mechanical engineering 2019-09, Vol.11 (9)
Main Authors: Hassan Amin, Amin, Elbadawy, Ibrahim, Elgendy, E, Fatouh, M
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Design factors
Design optimization
Ejection
Entrainment
Fluid dynamics
Inclination angle
Natural gas
Nozzles
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Summary: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.
ISSN:1687-8132
1687-8140
DOI:10.1177/1687814019880368