Maximisation de la récupération de pression utilisant des tuyères à lobes dans un éjecteur supersonique.
Maximizing pressure recovery using lobed nozzles in a supersonic ejector.
Auteurs : OPGENORTH M. J., SEDERSTROM D., MCDERMOTT W., et al.
Type d'article : Article
Résumé
Novel designs for supersonic ejectors in refrigeration applications focus on the reduction of the primary fluid flow rates required (entrainment ratio), as well as, increasing the total pressure recovery. This work improves the performance by enhanced mixing through flow instability by adding lobes to the circular nozzle design, combined with the profiling of the mixing channel. The objective was to determine the impact of the aspect ratio and total perimeter of the lobes on system pressure recovery and entrainment ratio. Using the conditions and geometry from the Eames [1] profiled mixing channel as the baseline and integrating a lobed nozzle, an improved pressure recovery of 6.4 from 4.0 with a perimeter value of 30 mm was achieved. Increasing the perimeter beyond this value drives the frictional losses along the wall surfaces to dominate the process and the recovered pressure reduces back to the circular nozzle. [Reprinted with permission of Elsevier. Copyright 2012.]
Détails
- Titre original : Maximizing pressure recovery using lobed nozzles in a supersonic ejector.
- Identifiant de la fiche : 30003704
- Langues : Anglais
- Source : Applied Thermal Engineering - vol. 37
- Date d'édition : 05/2012
- DOI : http://dx.doi.org/10.1016/j.applthermaleng.2011.11.057
Liens
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Indexation
- Thèmes : Systèmes à éjection, cycle à air, cycle Stirling, autres cycles
- Mots-clés : Géometrie; Tuyère; Performance; Pression; Éjecteur
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Effect of throat diameters of the ejector on th...
- Auteurs : CHAIWONGSA P., WONGWISES S.
- Date : 06/2007
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 4
- Formats : PDF
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Study of a novel inlet geometry for ejectors.
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- Date : 07/2022
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 139
- Formats : PDF
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- Date : 21/08/2007
- Langues : Anglais
- Source : ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
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- Auteurs : BANASIAK K., HAFNER A., SMOLKA J.
- Date : 12/04/2010
- Langues : Anglais
- Source : 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2010). Proceedings. Sydney, Australia, April 12-14, 2010.
- Formats : PDF
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Comparison of various motive flow control metho...
- Auteurs : ELBEL S., LAWRENCE N., ZHU J.
- Date : 20/07/2017
- Langues : Anglais
- Source : 8th international conference on compressors and refrigeration, 2017.
- Formats : PDF
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