Analysis of Flow-Induced Vibration of the Volute of a Centrifugal Pump Based on Finite Element Method

2010 ◽  
Author(s):  
Jianping Yuan ◽  
Yun Liang ◽  
Shouqi Yuan ◽  
Haifang Xiong ◽  
Ji Pei
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Unsteady Flow ◽  
Centrifugal Pump ◽  
Radial Force ◽  
Vibration Response ◽  
Flow Induced Vibration ◽  
Hydraulic Force ◽  
Blade Frequency ◽  
Element Method

During the operation of centrifugal pumps, radial hydraulic force is generated due to non-uniform flow within pumps, which is one of the main sources of the vibration of the centrifugal pump volute. In this paper, based on CFD and finite element method, it was calculated and analyzed that the volute vibration of a centrifugal pump caused by radial hydraulic force. The reason of the occurrence of radial force was analyzed, and by simplifying the theoretical formulas the force was calculated. Then the unsteady flow field of a centrifugal pump was simulated and analyzed under different running conditions by CFD method. Based on the simulation results, the radial hydraulic force of the pump was calculated. Finally, vibration response of the pump volute due to the hydraulic radial force was obtained. By analyzing the vibration response datum, vibration parameters were got such as the displacement, velocity and acceleration of vibration. It was obtained that the main vibration frequencies of the pump volute which is caused by unsteady flow are blade frequency and its harmonic frequencies. The pump volute has a minimum vibration under design flow rate condition, and it has a maximum vibration at the 1.5 times design rated flow whilst the vibration frequency is the integral multiple of the blade frequency. This study is helpful to understand the flow-induced vibration of pump volute and to improve the hydraulic design of the centrifugal pump.

Power Flow Finite Element Analysis of Dynamic Systems: Basic Theory and Application to Beams

1989 ◽  
Vol 111 (1) ◽  
pp. 94-100 ◽  
Author(s):  
D. J. Nefske ◽  
S. H. Sung
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Systems ◽  
Power Flow ◽  
Control Volume ◽  
Flow Analysis ◽  
Vibration Response ◽  
Element Analysis ◽  
Power Flow Analysis ◽  
Element Method

A power flow analysis has been developed for predicting the vibration response of dynamic systems to high frequencies at which the traditional finite element method is no longer practical. As compared to Statistical Energy Analysis, which predicts an overall vibration response of each dynamic subsystem, the power flow analysis enables one to predict the spatial variation of the vibration response within each subsystem, as well as the power flow and vibration response throughout the entire system. The formulation of the power flow analysis is based on a differential, control-volume approach and is shown to result in a partial differential equation of the heat conduction type which can be solved by applying the finite element method. Example applications to (1) an uncoupled beam and (2) two coupled beams are presented to illustrate the analysis.

Parameters Performance to the Vibration Isolation in Three-Dimensional Elastic Floating Raft Isolation System

2012 ◽  
Vol 472-475 ◽  
pp. 2659-2662 ◽  
Author(s):  
Guo He Jiang ◽  
Gang Wu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Vibration Isolation ◽  
Three Dimensional ◽  
Vibration Response ◽  
System Model ◽  
The Finite Element Method ◽  
Isolation System ◽  
Floating Raft ◽  
Element Method

Based on the three-dimensional elastic floating raft isolation system model, this paper using the finite element method to calculate vibration response of the system, and then analyze the performance of floating raft under different mass and stiffness, providing useful conclusions for vibration isolation designing.

Internal Unsteady Flow Induced Vibration in Centrifugal Pump

2012 ◽  
Vol 479-481 ◽  
pp. 1194-1199
Author(s):  
Chun Lei Shao ◽  
Jian Feng Zhou ◽  
Bo Qin Gu
Keyword(s):  
Unsteady Flow ◽  
Centrifugal Pump ◽  
Pressure Fluctuation ◽  
Pressure Amplitude ◽  
Flow Induced Vibration ◽  
Fluid Delivery ◽  
Pressure Disturbance ◽  
Impeller Outlet ◽  
The Time Domain ◽  
Blade Frequency

Centrifugal pump is an important installation for fluid delivery. The research on the unsteady flow in centrifugal pump is very meaningful to reducing vibration. The methods of numerical simulation were discussed. The unsteady pressure field was simulated by using Sliding Mesh (SM) model provided by Fluent. The time domain data for pressure were obtained at the monitoring points, and they were translated to frequency domain data by using FFT. The results show that the static pressure at the impeller outlet increases along the direction of impeller rotation from the position near the volute tongue. The pressure disturbance is relatively large near the volute tongue. The pressure disturbance at the impeller inlet is smaller than that at the impeller outlet. The volute tongue plays a key role in the flow induced vibration. The position, where the blade is in closest proximity to the head of volute tongue, is the turning point in the pressure fluctuation cycle. The maximum peak value of pressure fluctuation appears at 145Hz, which is the blade frequency. Other pressure peaks are evident at multiples of the blade frequency. Also the pressure amplitude decreases with increasing frequency.

Sign in / Sign up

Export Citation Format

Share Document