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Optimisation du profil de l’extrémité de la spirale orbitale dans un compresseur à spirale avec chambre d’aspiration asymétrique.

Optimization of the tip profile of orbiting scroll in an asymmetry suction chamber scroll compressor.

Numéro : B1-193

Auteurs : SUN S. H., SONG Z., GUO P. C., ZHANG B., MAO Z. K.

Résumé

The scroll compressors with asymmetrical suction chambers have large discharge loss, as the pressure in the outer chamber is far larger than the discharge pressure when the discharge process begins. It is necessary to optimize the scroll profile around the discharge port to reduce the discharge loss. The theoretical method is to redesign the tip profile to obtain the same volume ratio of the outer working chamber with the inner working chamber. However, as it is difficult to predict the discharge loss through the flank gap in the discharge chamber, the optimum design cannot be obtained. In this paper, we establish an optimization platform based on the CFD method. The profile of orbiting scroll tip is parametrized with CAD software, then the CFD calculation will be done and the performance parameters will be extracted. The MOST optimization algorithm is used to search for the best performance parameters and control the parameterized value of the scroll profile. After iterations, the best profile with a modification angle of 66.3° was obtained. Compared to the original model, the volumetric efficiency of the compressor increased by 4.11%; and the isentropic efficiency increased by 4.91%. Afterward, the flow field is analyzed to study the characteristics of the optimized scroll compressor. The results show that the backflow, the secondary vortex in the discharge chamber and the discharge mass flow pulsation were reduced, which led to the decrease of the discharge loss and the improvement of the isentropic efficiency.

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Pages : 9

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Détails

  • Titre original : Optimization of the tip profile of orbiting scroll in an asymmetry suction chamber scroll compressor.
  • Identifiant de la fiche : 30028748
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 12th International Conference on Compressors and their Systems
  • Date d'édition : 09/2021
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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