Fluid‐structure interaction analysis of a collapsible axial flow blood pump impeller and protective cage for Fontan patients

Abstract This paper presents the results of a coupled two-way fluid-structure interaction analysis of a slender flexible vertical cantilevered pipe hanging concentrically within a shorter rigid tube forming an annulus. The pipe is subjected to internal and annular flows simultaneously. This system has applications in brine production and salt-cavern hydrocarbon storage. In the present study, the fluid-structure problem is solved with a finite-volume-based CFD code for the fluid domain coupled to a finite-element-based CSM code for the structural domain. The numerical results obtained for the free-end displacement of the central pipe versus the annular/internal flow velocity ratio U_o/U_i are presented and compared with those obtained from experiment. The capability of the numerical model to predict the onset of the experimentally observed flutter instability in the system is also examined. This provides a better insight into the dynamics of the system.

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Comparative Analysis of Strength and Modal Characteristics of a Full Tubular Pump and an Axial flow Pump Impellers Based on Fluid-Structure Interaction

Energies ◽

10.3390/en14196395 ◽

2021 ◽

Vol 14 (19) ◽

pp. 6395

Author(s):

Lijian Shi ◽

Jun Zhu ◽

Li Wang ◽

Shiji Chu ◽

Fangping Tang ◽

...

Keyword(s):

Equivalent Stress ◽

Fluid Structure Interaction ◽

Axial Flow ◽

Total Deformation ◽

Stress Concentrations ◽

Pump Impeller ◽

Fluid Structure ◽

Structure Interaction ◽

Axial Flow Pump ◽

Flow Pump

Fluid-structure interaction (FSI) was used to determine the structural mechanical characteristics of full tubular and axial-flow pumps. The results showed that as the flow rate increases, the total deformation and equivalent stress are significantly reduced. The max total deformation (MTD) and the max equivalent stress (MES) of the full tubular pump impeller occur on the outer edge of the blade. There are two stress concentrations in the full tubular pump impeller, one of which is located in the outlet area of the rim, and the other is located in the outlet area of the hub. However, the MES of the axial-flow pump appears in the center of the blade hub. The performance difference between the full tubular pump and the axial-flow pump is mainly caused by the clearance backflow. The natural frequency of the full tubular pump is lower than that of the axial-flow pump on the basis of the modal results. The MES of the full tubular pump is mainly concentrated at the junction of the blade and the motor rotor, and the max thickness of the rim is 6mm, which can be more prone to cracks and seriously affect the safety and stability of the pump.

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Numerical methodology for fluid-structure interaction analysis of nuclear fuel plates under axial flow conditions

Nuclear Engineering and Design ◽

10.1016/j.nucengdes.2018.04.009 ◽

2018 ◽

Vol 333 ◽

pp. 76-86 ◽

Cited By ~ 8

Author(s):

Javier González Mantecón ◽

Miguel Mattar Neto

Keyword(s):

Nuclear Fuel ◽

Interaction Analysis ◽

Fluid Structure Interaction ◽

Axial Flow ◽

Flow Conditions ◽

Fluid Structure ◽

Structure Interaction

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Analysis of Strength and Modal Characteristics of a Full Tubular Pump Impeller Based on Fluid-Structure Interaction

10.21203/rs.3.rs-627588/v1 ◽

2021 ◽

Author(s):

Lijian Shi ◽

Jun Zhu ◽

Li Wang ◽

Shiji Chu ◽

FangPing Tang ◽

...

Keyword(s):

Equivalent Stress ◽

Fluid Structure Interaction ◽

Axial Flow ◽

Total Deformation ◽

Stress Concentrations ◽

Pump Impeller ◽

Fluid Structure ◽

Structure Interaction ◽

Axial Flow Pump ◽

Flow Pump

Abstract FSI(Fluid-Structure Interaction) is used to perform the the structural mechanical characteristics on the full tubular and the axial-flow pumps. The results show that as the flow rate increases, the total deformation and equivalent stress are significantly reduced. The MTD(max total deformation) and the MES(max equivalent stress) of the full tubular pump impeller appear at the outer edge of the blade. There are two stress concentrations in the full tubular pump impeller, in which one is located in the outlet area of the rim, and the other is located in the outlet area of the hub. However, the MES of the axial-flow pump appears at the center of the blade hub. The performance difference between the full tubular pump and the axial-flow pump is mainly caused by the clearance backflow. The natural frequency of the full tubular pump is lower than that of the axial-flow pump according to the modal results. The MES of the full tubular pump is mainly concentrated at the junction of the blade and the motor rotor, and the max thickness of the rim is 6mm, which is more prone to cracks, seriously affecting the safety and stability of the pump.

Download Full-text