Dynamic stress of impeller blade of shaft extension tubular pump device based on bidirectional fluid-structure interaction

2017 ◽  
Vol 31 (4) ◽  
pp. 1561-1568 ◽  
Author(s):  
Kan Kan ◽  
Yuan Zheng ◽  
Shifeng Fu ◽  
Huiwen Liu ◽  
Chunxia Yang ◽  
...  
Keyword(s):  
Dynamic Stress ◽  
Fluid Structure Interaction ◽  
Impeller Blade ◽  
Fluid Structure ◽  
Structure Interaction

scholarly journals Study into the Improvement of Dynamic Stress Characteristics and Prototype Test of an Impeller Blade of an Axial-Flow Pump Based on Bidirectional Fluid–Structure Interaction

2019 ◽  
Vol 9 (17) ◽  
pp. 3601 ◽  
Author(s):  
Kan Kan ◽  
Yuan Zheng ◽  
Huixiang Chen ◽  
Jianping Cheng ◽  
Jinjin Gao ◽  
...  
Keyword(s):  
Finite Element ◽  
Dynamic Stress ◽  
Fluid Structure Interaction ◽  
Axial Flow ◽  
Gravity Effect ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Prototype Test ◽  
Axial Flow Pump ◽  
Flow Pump

This paper performed a numerical study into the dynamic stress improvement of an axial-flow pump and validated the simulation results with a prototype test. To further analyze the dynamic stress characteristics of impeller blades of axial-flow pumps, a bidirectional fluid–structure interaction (FSI) was applied to numerical simulations of the unsteady three-dimensional (3-D) flow field of the whole flow system of an axial-flow pump, and the gravity effect was also taken into account. In addition, real-structure-based single-blade finite element model was established. By using the finite element method, a calculation of the blade’s dynamic characteristics was conducted, and its dynamic stress distribution was determined based on the fourth strength theory. The numerical results were consistent with the prototype tests. In a rotation cycle, the dynamic stress of the blade showed a tendency of first increasing, and then decreasing, where the maximum value appeared in the third quadrant and the minimum appeared in the first quadrant in view of the gravity effect. A method for reducing the stress concentration near the root of impeller blades was presented, which would effectively alleviate the possibility of cracking in the unreliable region of blades. Simultaneously, an experimental method for the underwater measurement of the dynamic stress of prototypical hydraulic machinery was put forward, which could realize the underwater sealing of data acquisition instruments on rotating machinery and the offline collection of measured data, finally effectively measuring the stress of underwater moving objects.

scholarly journals Investigation of dynamic stress of rotor in residual heat removal pumps based on fluid–structure interaction

2016 ◽  
Vol 8 (9) ◽  
pp. 168781401666574 ◽  
Author(s):  
Banglun Zhou ◽  
Jianping Yuan ◽  
Yanxia Fu ◽  
Feng Hong ◽  
Jiaxing Lu
Keyword(s):  
Dynamic Stress ◽  
Fluid Structure Interaction ◽  
Heat Removal ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Residual Heat

Fluid-Structure Interaction Analysis for Resonance Investigation of Pump-Turbine Runner

2015 ◽  
Author(s):  
Sadao Kurosawa ◽  
Kiyoshi Matsumoto ◽  
Junpei Miyagi ◽  
Lingyan He ◽  
Zhengwei Wang
Keyword(s):  
Dynamic Stress ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Forced Response ◽  
Structural Deformation ◽  
Analysis Method ◽  
Pump Turbine ◽  
Fluid Structure ◽  
Structural Interaction ◽  
Structure Interaction

In the development of high head pumped storage projects, one of the critical problems is the strength of pump-turbine runners. In this paper, the analysis method of forced response of the runner structure is presented and the prediction accuracy is validated by comparing with the results of the prototype head model test. And the application results for resonance of pump-turbine startup process are shown. Basically it is necessary for the prediction of the runner dynamic stress to use a combined approach of fluid dynamics and structural dynamics. Due to the high complexity of the phenomena and the limitation of computer power, the numerical simulation for the fluid-structural interaction phenomena was in the past too expensive and not feasible. However, due to consideration that vibration displacement is very small, such complex analysis has been handled as one-way fluid-structural interaction problem. Namely the excitation force is calculated by whole passage flow analysis that is ignored the structural deformation and takes into account the rotor-stator interaction effect. And the dynamic stress of runner is calculated by the transient response analysis taken account into the added mass effect of surrounding water using an acoustic fluid formulation. Due to such a simplification, it has been possible to evaluate the runner dynamic stress in a short time. As a result, it was confirmed that the dynamic behavior such as runner vibration and pressure fluctuation under turbine operating range and the runner stress can be analyzed with the sufficient accuracy and due to applying as standard procedure in TOSHIBA, it can be avoided a failure risk in an early design phase. Moreover the fluid-structure interaction analysis method in this paper can be easily adapted to apply for other type of turbines, such as Francis turbines and Kaplan turbines.

FLUID STRUCTURE INTERACTION OF ROWING BLADE FOR HYDRODYNAMIC PROPULSION TO ENHANCE ROWING PERFORMANCE

2014 ◽  
Author(s):  
Abdul Aziz Mohd. Yusof ◽  
◽  
Ardiyansyah Syahrom ◽  
M. N. Harun ◽  
A. H. Omar
Keyword(s):  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Rowing Performance
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