NDLI: Determination of Pump Impeller Deflections: Comparison of FSI-Simulations to Measurements

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Benra, Friedrich-Karl Dohmen, Hans Josef Wan, Bo
Copyright Year	2006
Abstract	The determination of pump rotor oscillations induced by exciting hydrodynamic forces requires both a solution of the flow field in the pump and an analysis of the structural mechanics of the pump rotor. In the present contribution, simulations which accomplished different coupling methods between the fluid dynamic solution and the structural analysis were carried out for a single-blade pump. In a first approach a one way coupling was used to determine the oscillations of the pump impeller during operation. The forces calculated from the transient flow field were treated as a load acting at the impeller. A comparison of the computed oscillations to measurements showed that in the present case the strong physical interaction between the flow and the impellers structure requires the feedback of the structural analysis to the flow solution to give more meaningful results. In a second approach a simulation was carried out, which accomplished a full coupling of the fluid dynamics and the structural dynamics. Both physics were solved alternating and at least two iterations, one for each physics, were needed to achieve the required coupled response. The calculations were coupled by passing loads across the physics field interfaces. In the present example, for each regarded time step during one impeller revolution, the pressure field acting at the impeller surface was transferred from the CFD solver to the structural solver as the load on the impeller and the computed deflection of the impeller was transferred back deforming the computational grid of the fluid volume.
Sponsorship	Fluids Engineering Division
Starting Page	291
Ending Page	296
Page Count	6
File Format	PDF
ISBN	0791847519
DOI	10.1115/FEDSM2006-98464
e-ISBN	0791837831
Volume Number	Volume 2: Fora
Conference Proceedings	ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering
Language	English
Publisher Date	2006-07-17
Publisher Place	Miami, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Coupled solution Fluid dynamics Single-blade impeller Fluid-structure interaction Structural analysis Structural dynamics Blades Deflection Computational fluid dynamics Rotors Oscillations Fluid-dynamic forces Fluid structure interaction Unsteady flow Flow (dynamics) Pressure Physics Stress Pump impellers Fluids Simulation Pumps Feedback Impellers
Content Type	Text
Resource Type	Article

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