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Prédiction de l’impact de la vitesse d’une soupape à lamelles multiples.

Prediction of reed valve velocity impact.

Numéro : 1334

Auteurs : SILVA I., FAVERA A. D., SANTOS C. J., DESCHAMPS C. J.

Résumé

The reliability of compressor valves is a significant challenge in extending the operational speed range of compressors due to the risk of impact fatigue failure. Valve raw material suppliers have adopted the velocity of valve impact against the seat as a criterion to assess the reliability of impact fatigue. This article analyzes the capabilities of a low-cost numerical model developed with GT-SUITE in predicting the suction valve impact velocity, while analyzing the influence of each model parameter and operational condition on the prediction of velocity impact. The numerical investigation was validated through measurements of valve velocity carried out with a laser doppler vibrometer. The study shows that valve contact modeling significantly affects the prediction of valve dynamics due to the rebound effect following valve impact. Furthermore, oil stiction has substantial influence on the prediction of valve velocity impact under high-speed operations. Overall, the model was able to predict the impact velocity in good agreement with the measurements. Compressor speed was found to significantly increase the valve impact velocity up to a certain point, after which it shows little variation between the two highest speeds tested. On the other hand, the pressure ratio showed an insignificant influence on valve impact velocity. The findings of this study improve the valve dynamics predictions, especially under high-speed operations.

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Pages : 10

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Détails

  • Titre original : Prediction of reed valve velocity impact.
  • Identifiant de la fiche : 30033603
  • Langues : Anglais
  • Sujet : Généralités
  • Source : 2024 Purdue Conferences. 27th International Compressor Engineering Conference at Purdue.
  • Date d'édition : 18/07/2024

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