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Réguler la pulsation des gaz à l’aide d’un piège à pulsation par dérivation doté de tubes perforés et d’un silencieux par absorption optionnel.

Gas pulsation control by a shunt pulsation trap with perforated tubes and an optional absorptive silencer.

Numéro : pap.1022

Auteurs : HUANG P. X., YONKERS S., HOKEY D.

Résumé

This paper is a continuing work from the same authors on the same topic of gas pulsation control using a shunt pulsation trap method by Huang (2012a, 2014). Traditionally, a serial pulsation dampener/muffler, often a reactive type, is connected AFTER the discharge of a positive displacement compressor or engine. It is capable of reducing pressure pulsation level up to 10-20 folds or 20-40 dB but is bulky and suffers sizable back pressure losses. It has been demonstrated in the previous theoretical and experimental investigations by Huang (2012a, 2014) that gas pulsations can be as effectively controlled by an alternative method, shunt pulsation trap (SPT) of a parallel configuration, which is more compact and tackles the gas pulsations BEFORE the compressor or engine discharge, hence not suffering any back pressure losses. However, it is observed that the dampening element inside SPT by a perforated plate (p-plate) induces a severe “drum effect” with enhanced vibration and noise. This paper investigates experimentally the effect of a new dampening element inside the SPT by using circular perforated tubes (p-tubes) with minimum trap volume. It is found that p-tubes can effectively resolve the adverse “drum effect” of p-plate with improved pulsation/vibration/noise reduction. Furthermore, the use of an absorption type silencer is beneficial to further reduce noise level by 10-15 dB in addition to the p-tubes under Exhauster and Blower modes. However, this type of silencer will not have the sizable back pressure drop associated with reaction type silencers and therefore will not affect system efficiency. The integration of absorptive silencer into a p-tube based SPT would provide an optimal design choice for size/weight and pulsation/noise reduction, energy saving and for improving equipment fatigue life. The potentials for applying the SPT to screw and scroll compressors are enormous in the future since a significant portion of their operation is under off-design conditions of either an under-compression (UC) or over-compression (OC).

Documents disponibles

Format PDF

Pages : 8 p.

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 : Gas pulsation control by a shunt pulsation trap with perforated tubes and an optional absorptive silencer.
  • Identifiant de la fiche : 30019600
  • Langues : Anglais
  • Source : 2016 Purdue Conferences. 23rd International Compressor Engineering Conference at Purdue.
  • Date d'édition : 11/07/2016

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