Impact of Mesh Resolution and Temperature Effects in Jet Ejector CFD Calculations
Recent advancements in computational and experimental techniques have deepened the understanding of ejector dynamics. Working maps, which depict the relationship between operating conditions and the performance metrics of entrainment and pressure, are commonly used in defining the ejectors’ performa...
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MDPI AG
2025-04-01
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| Online Access: | https://www.mdpi.com/2076-3417/15/7/3880 |
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| author | José Galindo José Ramón Serrano Vicente Dolz Paulina Iljaszewicz |
| author_facet | José Galindo José Ramón Serrano Vicente Dolz Paulina Iljaszewicz |
| author_sort | José Galindo |
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| description | Recent advancements in computational and experimental techniques have deepened the understanding of ejector dynamics. Working maps, which depict the relationship between operating conditions and the performance metrics of entrainment and pressure, are commonly used in defining the ejectors’ performances and designs and enhancing their operational flexibility. This paper investigates the sensitivity of a jet ejector to variations in the inlet temperatures, with a focus on how changes in these temperatures affect its performance and Mach number distribution. Using high resolution CFD (computational fluid dynamics) simulations, this study maps ejector behavior by using the ideal gas approximation, marks Mach number scene responses to those changes, and is aimed at optimizing it to work with refrigeration systems using commercial fluid R1234yf/2,3,3,3-Tetrafluoropropene. The findings provide valuable insight into operational conditions for jet ejectors. The analysis revealed little dependence on the changes in inlet temperatures, therefore expanding the design working conditions by at least +20% of the temperature at each of the inlets. This study also analyzes the small deviations in ejector behavior due to temperature variations at the inlets. It contributes to the development of sustainable refrigeration systems, as it broadens the operational temperature range and enhances practical applications in this field, as this information is difficult to find in commercial databases. |
| format | Article |
| id | doaj-art-f64c339b51ac4efdbbf713a9cdcf76c5 |
| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-f64c339b51ac4efdbbf713a9cdcf76c52025-08-20T03:06:16ZengMDPI AGApplied Sciences2076-34172025-04-01157388010.3390/app15073880Impact of Mesh Resolution and Temperature Effects in Jet Ejector CFD CalculationsJosé Galindo0José Ramón Serrano1Vicente Dolz2Paulina Iljaszewicz3CMT—Clean Mobility and Thermofluids, Polytechnic University of València, Camí de Vera, s/n, 46022 València, SpainCMT—Clean Mobility and Thermofluids, Polytechnic University of València, Camí de Vera, s/n, 46022 València, SpainCMT—Clean Mobility and Thermofluids, Polytechnic University of València, Camí de Vera, s/n, 46022 València, SpainCMT—Clean Mobility and Thermofluids, Polytechnic University of València, Camí de Vera, s/n, 46022 València, SpainRecent advancements in computational and experimental techniques have deepened the understanding of ejector dynamics. Working maps, which depict the relationship between operating conditions and the performance metrics of entrainment and pressure, are commonly used in defining the ejectors’ performances and designs and enhancing their operational flexibility. This paper investigates the sensitivity of a jet ejector to variations in the inlet temperatures, with a focus on how changes in these temperatures affect its performance and Mach number distribution. Using high resolution CFD (computational fluid dynamics) simulations, this study maps ejector behavior by using the ideal gas approximation, marks Mach number scene responses to those changes, and is aimed at optimizing it to work with refrigeration systems using commercial fluid R1234yf/2,3,3,3-Tetrafluoropropene. The findings provide valuable insight into operational conditions for jet ejectors. The analysis revealed little dependence on the changes in inlet temperatures, therefore expanding the design working conditions by at least +20% of the temperature at each of the inlets. This study also analyzes the small deviations in ejector behavior due to temperature variations at the inlets. It contributes to the development of sustainable refrigeration systems, as it broadens the operational temperature range and enhances practical applications in this field, as this information is difficult to find in commercial databases.https://www.mdpi.com/2076-3417/15/7/3880jet ejectorCFDcompressible fluidworking mapsadaptive mesh refinement |
| spellingShingle | José Galindo José Ramón Serrano Vicente Dolz Paulina Iljaszewicz Impact of Mesh Resolution and Temperature Effects in Jet Ejector CFD Calculations Applied Sciences jet ejector CFD compressible fluid working maps adaptive mesh refinement |
| title | Impact of Mesh Resolution and Temperature Effects in Jet Ejector CFD Calculations |
| title_full | Impact of Mesh Resolution and Temperature Effects in Jet Ejector CFD Calculations |
| title_fullStr | Impact of Mesh Resolution and Temperature Effects in Jet Ejector CFD Calculations |
| title_full_unstemmed | Impact of Mesh Resolution and Temperature Effects in Jet Ejector CFD Calculations |
| title_short | Impact of Mesh Resolution and Temperature Effects in Jet Ejector CFD Calculations |
| title_sort | impact of mesh resolution and temperature effects in jet ejector cfd calculations |
| topic | jet ejector CFD compressible fluid working maps adaptive mesh refinement |
| url | https://www.mdpi.com/2076-3417/15/7/3880 |
| work_keys_str_mv | AT josegalindo impactofmeshresolutionandtemperatureeffectsinjetejectorcfdcalculations AT joseramonserrano impactofmeshresolutionandtemperatureeffectsinjetejectorcfdcalculations AT vicentedolz impactofmeshresolutionandtemperatureeffectsinjetejectorcfdcalculations AT paulinailjaszewicz impactofmeshresolutionandtemperatureeffectsinjetejectorcfdcalculations |