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EXPERIMENTAL AND NUMERICAL INVESTIGATION OF FLOW-INDUCED VIBRATION: IN A HIGH PRESSURE DOUBLE VOLUTE CENTRIFUGAL PUMP - Couverture souple

Khalifa, Atia

 
9783639286618: EXPERIMENTAL AND NUMERICAL INVESTIGATION OF FLOW-INDUCED VIBRATION: IN A HIGH PRESSURE DOUBLE VOLUTE CENTRIFUGAL PUMP
Couverture souple
ISBN 10 : 3639286618 ISBN 13 : 9783639286618
Editeur : VDM Verlag, 2010

Synopsis

This work is an experimental and numerical investigation of the flow induced vibration problem at blade passing frequencies of a high-pressure double volute boiler feed pump. The effects of variable operating conditions and different design modifications were studied by model testing to minimize the vibration level. The amplitude and strength of the pressure fluctuation inside the pump depend on the measuring location with respect to the interaction zone at volute tongues. The unsteady pressure fluctuations are very sensitive to the flow rate. Pressure fluctuations are increased at high rotational speeds and at off-design conditions. The original pump has a special V-shaped cut at the exit of impeller blades which reduces the pressure fluctuations up to 45% depending on flow rate and measuring location. It also reduced pump vibration by 20 to 50% depending on flow rate. The selection of the suitable gap between impeller and diffuser vanes for minimum vibration levels was based on experimentation under the expected operating conditions. Smaller gaps are not preferable for the pressure fluctuations inside the pump since they produce higher impeller/volute interaction.

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À propos de l'auteur

Dr. Atia E. Khalifa, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran-Saudi Arabia. His B. Sc. From Menoufia University-Egypt, PhD from KFUPM 2009 in Mechanical Engineering, Post-Doc at MIT-Cambridge MA, USA. His research interests include fluid mechanics, rotating machinery, combustion, and thermal sciences.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
VDM Verlag
Date d'édition
2010
Langue
anglais
ISBN 10 
3639286618
ISBN 13 
9783639286618
Reliure
Broché
Nombre de pages
288
Coordonnées du fabricant
non disponible
Personne responsable
non disponible