Comptes Rendus
Note
CFD analysis of operating condition effects on optimum nozzle exit position of a supersonic ejector using the refrigerant R134a
Ali Hadj1 ; Mohammed Boulenouar2 
1 Laboratoire des Sciences et Ingénierie Maritime (LSIM), Department of Maritime Engineering, Faculty of Mechanical Engineering, El Mnaouar, BP 1505, Bir El Djir 31000, USTO Oran, Algeria
2 Laboratoire des Sciences et Ingénierie Maritime (LSIM), Department of Maritime Engineering, Faculty of Mechanical Engineering, El Mnaouar, BP 1505, Bir El Djir 31000 USTO Oran, Algeria
Comptes Rendus. Mécanique, Volume 349 (2021) no. 1, pp. 189-202.

In this work, the computational fluid dynamics technique is employed to study operating condition effects on the optimum value of an important parameter called the nozzle exit position (NXP) for an ejector design. This ejector uses the gas R134a as the working fluid. Numerical tests are carried out using a combination of the REFPROP 7.0 database state equation and the high-Reynolds version of the SST k–ω model. Good agreement in terms of entrainment ratio and critical temperature is obtained between computed values and measurements. In addition, numerical results indicate that the optimum NXP maximizes ejector performance and is highly dependent on operating conditions.

Reçu le :
Révisé le :
Accepté le :
Publié le :
DOI : 10.5802/crmeca.60
Mots clés : Optimum NXP, Operating conditions, R134a, Entrainment ratio, Refrigeration
Ali Hadj 1 ; Mohammed Boulenouar 2

1 Laboratoire des Sciences et Ingénierie Maritime (LSIM), Department of Maritime Engineering, Faculty of Mechanical Engineering, El Mnaouar, BP 1505, Bir El Djir 31000, USTO Oran, Algeria
2 Laboratoire des Sciences et Ingénierie Maritime (LSIM), Department of Maritime Engineering, Faculty of Mechanical Engineering, El Mnaouar, BP 1505, Bir El Djir 31000 USTO Oran, Algeria
Licence : CC-BY 4.0
Droits d'auteur : Les auteurs conservent leurs droits 
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     title = {CFD analysis of operating condition effects on optimum nozzle exit position of a supersonic ejector using the refrigerant {R134a}},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {189--202},
     publisher = {Acad\'emie des sciences, Paris},
     volume = {349},
     number = {1},
     year = {2021},
     doi = {10.5802/crmeca.60},
     language = {en},
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Ali Hadj; Mohammed Boulenouar. CFD analysis of operating condition effects on optimum nozzle exit position of a supersonic ejector using the refrigerant R134a. Comptes Rendus. Mécanique, Volume 349 (2021) no. 1, pp. 189-202. doi : 10.5802/crmeca.60. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.60/

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