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Analyse théorique du bruit et des vibrations générés par la pulsation de la pression du gaz dans les compresseurs hermétiques.

Theoretical analysis of noise and vibration generated by gas pressure pulsation in hermetic compressors.

Numéro : 1527

Auteurs : HE D., ZIVIANI D., LIU Y.

Résumé

Due to the intermittent nature of discharge flow in hermetic compressors, gas pulsation is a major source of noise, vibration and harshness (NVH) effects. In the presented study on gas pulsation noise of hermetic compressors, a model was developed where the thermodynamics aspects of the compression process and the vibro-acoustics aspects are coupled together. The vibro-acoustics submodel is based on finite element method, and it describes the two-way coupled interaction of compressor cavity acoustics and shell vibration. The thermodynamics submodel is based on compressor model developed in previous studies, PDSim. It is used to compute the discharge gas pulsations that excite the cavity. Meanwhile, the acoustics response in the cavity is coupled with the thermodynamics submodel though proper modeling of discharge valves. Simulations were conducted to validate the models developed in the current work as well as the to demonstrate how these modeling tools can help compressor manufacturers to gain better understanding of the physical reasons behind NVH effects of compressors. These tools can also provide guidelines on NVH oriented design optimization of compressors.

Documents disponibles

Format PDF

Pages : 11

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Theoretical analysis of noise and vibration generated by gas pressure pulsation in hermetic compressors.
  • Identifiant de la fiche : 30028391
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2021 Purdue Conferences. 25th International Compressor Engineering Conference at Purdue.
  • Date d'édition : 05/2021
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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