Partager

Recherche sur la réduction du bruit aérodynamique de la pente de l’orifice de refoulement dans les compresseurs rotatifs.

Research on aerodynamic noise reduction of rotary compressor discharge port slope.

Numéro : 1478

Auteurs : WANG H., SHAN S.

Résumé

Aerodynamic noise is one of the important sound sources of rotary compressors. The airflow velocity is about 20m/s~50m/s near the discharge port when the high pressure refrigerant is discharging , and the airflow impacts the wall, so it forms complex vortexes, which generates aerodynamic noise. Therefore it is necessary to reduce the noise source near the discharge port of main bearing in rotary compressors. The discharge slope is redesigned, VG, serration and Helmholtz resonance chamber structure are used to control the flow. The 3D unsteady turbulent simulation is performed with DES method, then the dipole noise field is simulated using Simcenter3D. The CFD simulations show that VG and serrations help to reduce the turbulent kinetic energy in the muffler, FFT of the pressure at the muffler outlets shows a significant decrease in the pressure amplitude at 400,1000 Hz frequency interval. The Helmholtz resonance chamber works in a wider range than the design point. 3 compressors are manufactured for each scheme, the pressure at discharge port and sound power are tested. The test results show that the VG scheme reduces about 2dB in 1kHz frequency interval, and the Helmholtz resonance scheme reduces the noise from 1250Hz to 3150Hz compare to original one.

Documents disponibles

Format PDF

Pages : 7

Disponible

Gratuit

Télécharger

Détails

  • Titre original : Research on aerodynamic noise reduction of rotary compressor discharge port slope.
  • Identifiant de la fiche : 30033621
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2024 Purdue Conferences. 27th International Compressor Engineering Conference at Purdue.
  • Date d'édition : 18/07/2024

Liens


Voir d'autres communications du même compte rendu (80)
Voir le compte rendu de la conférence

Indexation