Numerical Study for the Effect of Secondary Fluid Inlet Geometrical Parameters on the Performance of Water-Steam Two-Phase Ejector used for Desalination System
This study investigates the effect of secondary fluid inlet geometrical parameters on the performance of a two-phase water-steam ejector operating in the subsonic flow regime. A 3D numerical model, employing the Volume-of-Fluid (VOF) method, was developed to analyze the impact of varying secondary...
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University of Diyala
2025-06-01
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| Series: | Diyala Journal of Engineering Sciences |
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| Online Access: | https://djes.info/index.php/djes/article/view/1785 |
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| author | Mustafa S. Mahdi Akram W. Ezzat |
| author_facet | Mustafa S. Mahdi Akram W. Ezzat |
| author_sort | Mustafa S. Mahdi |
| collection | DOAJ |
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This study investigates the effect of secondary fluid inlet geometrical parameters on the performance of a two-phase water-steam ejector operating in the subsonic flow regime. A 3D numerical model, employing the Volume-of-Fluid (VOF) method, was developed to analyze the impact of varying secondary fluid inlet angles (30°, 45°, 60°, 75°, and 90°) and the number of secondary fluid inlets (1, 2, 3, and 4). The study examined these parameters across a range of primary fluid flow rates (6-24 L/min) to understand their interactions. The numerical model was validated through comparison with existing experimental data, demonstrating strong agreement between predicted and measured ejector entrainment ratios (Er). An optimal secondary fluid inlet angle of 45° was identified, providing the best balance between momentum transfer and perpendicular velocity components. It was found also that increasing the number of secondary fluid inlets from 1 to 3 significantly enhanced the ejector Er, while further increases yielded minimal additional improvements. The effects of secondary fluid inlet parameters were more pronounced at higher primary fluid flow rates. These results contribute to a deeper understanding of two-phase ejector performance and provide valuable insights for optimizing their design in various applications.
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| format | Article |
| id | doaj-art-ffadbc9f99cd4b019fe7865dd486a00b |
| institution | Kabale University |
| issn | 1999-8716 2616-6909 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | University of Diyala |
| record_format | Article |
| series | Diyala Journal of Engineering Sciences |
| spelling | doaj-art-ffadbc9f99cd4b019fe7865dd486a00b2025-08-20T03:27:40ZengUniversity of DiyalaDiyala Journal of Engineering Sciences1999-87162616-69092025-06-0118210.24237/djes.2024.18208Numerical Study for the Effect of Secondary Fluid Inlet Geometrical Parameters on the Performance of Water-Steam Two-Phase Ejector used for Desalination SystemMustafa S. Mahdi0Akram W. Ezzat1Department of Mechanical Engineering, University of Baghdad, Baghdad 10071, IraqSchool of Mechanical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia This study investigates the effect of secondary fluid inlet geometrical parameters on the performance of a two-phase water-steam ejector operating in the subsonic flow regime. A 3D numerical model, employing the Volume-of-Fluid (VOF) method, was developed to analyze the impact of varying secondary fluid inlet angles (30°, 45°, 60°, 75°, and 90°) and the number of secondary fluid inlets (1, 2, 3, and 4). The study examined these parameters across a range of primary fluid flow rates (6-24 L/min) to understand their interactions. The numerical model was validated through comparison with existing experimental data, demonstrating strong agreement between predicted and measured ejector entrainment ratios (Er). An optimal secondary fluid inlet angle of 45° was identified, providing the best balance between momentum transfer and perpendicular velocity components. It was found also that increasing the number of secondary fluid inlets from 1 to 3 significantly enhanced the ejector Er, while further increases yielded minimal additional improvements. The effects of secondary fluid inlet parameters were more pronounced at higher primary fluid flow rates. These results contribute to a deeper understanding of two-phase ejector performance and provide valuable insights for optimizing their design in various applications. https://djes.info/index.php/djes/article/view/1785Two-phase ejectorentrainment ratiosecondary fluid inlet anglesmultiple secondary fluid inlet streams |
| spellingShingle | Mustafa S. Mahdi Akram W. Ezzat Numerical Study for the Effect of Secondary Fluid Inlet Geometrical Parameters on the Performance of Water-Steam Two-Phase Ejector used for Desalination System Diyala Journal of Engineering Sciences Two-phase ejector entrainment ratio secondary fluid inlet angles multiple secondary fluid inlet streams |
| title | Numerical Study for the Effect of Secondary Fluid Inlet Geometrical Parameters on the Performance of Water-Steam Two-Phase Ejector used for Desalination System |
| title_full | Numerical Study for the Effect of Secondary Fluid Inlet Geometrical Parameters on the Performance of Water-Steam Two-Phase Ejector used for Desalination System |
| title_fullStr | Numerical Study for the Effect of Secondary Fluid Inlet Geometrical Parameters on the Performance of Water-Steam Two-Phase Ejector used for Desalination System |
| title_full_unstemmed | Numerical Study for the Effect of Secondary Fluid Inlet Geometrical Parameters on the Performance of Water-Steam Two-Phase Ejector used for Desalination System |
| title_short | Numerical Study for the Effect of Secondary Fluid Inlet Geometrical Parameters on the Performance of Water-Steam Two-Phase Ejector used for Desalination System |
| title_sort | numerical study for the effect of secondary fluid inlet geometrical parameters on the performance of water steam two phase ejector used for desalination system |
| topic | Two-phase ejector entrainment ratio secondary fluid inlet angles multiple secondary fluid inlet streams |
| url | https://djes.info/index.php/djes/article/view/1785 |
| work_keys_str_mv | AT mustafasmahdi numericalstudyfortheeffectofsecondaryfluidinletgeometricalparametersontheperformanceofwatersteamtwophaseejectorusedfordesalinationsystem AT akramwezzat numericalstudyfortheeffectofsecondaryfluidinletgeometricalparametersontheperformanceofwatersteamtwophaseejectorusedfordesalinationsystem |