Influence of Diffuser Vane Number on Energy Loss of Multistage Centrifugal Pump

2021 ◽  
Vol 14 (4) ◽  
pp. 373-382
Author(s):  
TianXin Wu ◽  
DengHao Wu ◽  
Ting Zhang ◽  
HaiMing Huang ◽  
YueZhong Wu ◽  
...  
Keyword(s):  
Energy Loss ◽  
Centrifugal Pump ◽  
Multistage Centrifugal Pump

scholarly journals Optimal design of multistage centrifugal pump based on the combined energy loss model and computational fluid dynamics

2017 ◽  
Vol 187 ◽  
pp. 10-26 ◽  
Author(s):  
Chuan Wang ◽  
Weidong Shi ◽  
Xikun Wang ◽  
Xiaoping Jiang ◽  
Yang Yang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Optimal Design ◽  
Energy Loss ◽  
Centrifugal Pump ◽  
Loss Model ◽  
Multistage Centrifugal Pump

Experimental study on the unsteady performance of the multistage centrifugal pump

2018 ◽  
Vol 40 (5) ◽  
Author(s):  
Zhanxiong Lu ◽  
Chuan Wang ◽  
Ning Qiu ◽  
Weidong Shi ◽  
Xiaoping Jiang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Centrifugal Pump ◽  
Multistage Centrifugal Pump ◽  
Unsteady Performance

scholarly journals Vibration in a Multistage Centrifugal Pump under Varied Conditions

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Ling Bai ◽  
Ling Zhou ◽  
Xiaoping Jiang ◽  
Qinglong Pang ◽  
Daoxing Ye
Keyword(s):  
Centrifugal Pump ◽  
Vibration Frequency ◽  
Vibration Velocity ◽  
Major Type ◽  
Outlet Section ◽  
Flow Conditions ◽  
Technical Requirements ◽  
Mass Unbalance ◽  
Blade Passing Frequency ◽  
Multistage Centrifugal Pump

Multistage pumps are intended to improve designs with low-vibration and -noise features as the industry applications increase the technical requirements. In this frame, it becomes really important to fully understand the vibration patterns of these kinds of complex machines. In this study, a vibration test bench was established to examine the vibration and stability of a cantilever multistage centrifugal pump under different flow rates. The vibration spectrum diagrams for the inlet and outlet sections and the pump body were evaluated under varied flow conditions. Results showed the effects of operational conditions on the vibration of the cantilever multistage centrifugal pump. Vibration velocity was primarily caused by mass unbalance at the shut-off flow rate point. Under different flow conditions, the blade passing frequency (BPF) and two times the blade passing frequency (2BPF) were the main excitation frequencies. The vibration frequency of the final pump body remained at the BPF under different flow conditions due to the contact with the outlet section. The major type of vibration frequency for the inlet and outlet was high frequency.

scholarly journals Research on the Pump Shaft Stability Analysis of Multistage Centrifugal Pump During Closed-Valve Start-Up Process

2020 ◽  
Vol 8 ◽  
Author(s):  
Yun Long ◽  
Bin Lin ◽  
Jie Fang ◽  
Jie Ge ◽  
Longbo Xu ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Centrifugal Pump ◽  
Start Up ◽  
Multistage Centrifugal Pump ◽  
Pump Shaft

scholarly journals Numerical Research on the Energy Loss of a Single-Stage Centrifugal Pump with Different Vaned Diffuser Outlet Diameters

2019 ◽  
Vol 158 ◽  
pp. 5523-5528 ◽  
Author(s):  
Fen Lai ◽  
Xiangyuan Zhu ◽  
Guojun Li ◽  
Liping Zhu ◽  
Fengming Wang
Keyword(s):  
Energy Loss ◽  
Centrifugal Pump ◽  
Single Stage ◽  
Vaned Diffuser ◽  
Numerical Research

scholarly journals Flow field analysis of multi-stage middle-open centrifugal pump inter-stage flow passage

2020 ◽  
Vol 155 ◽  
pp. 01014
Author(s):  
Xiao Zhang ◽  
He Huang
Keyword(s):  
Energy Loss ◽  
Centrifugal Pump ◽  
Guide Vane ◽  
Fluid Flows ◽  
Field Analysis ◽  
Original Design ◽  
Flow Passage ◽  
Guide Vanes ◽  
Multi Stage ◽  
Flow Field Analysis

In order to study the flow velocity, static pressure and turbulent kinetic energy distribution of the inter-stage flow passage, the numerical calculation of the inter-stage flow passage of the multistage split centrifugal pump was carried out under the design condition. The results show that the fluid flows along the inter-stage water flow channel, and backflow and vortices are generated at the guide vanes at the end of the bridge, which causes certain energy loss. In this paper, based on the original design, three different improvement schemes are proposed by changing the shape and position of the guide vane for the backflow and vortex generated near the guide vanes. The improved scheme is numerically simulated, and the energy loss values of the four different flow passages are calculated by integration. After comparison and analysis, the second scheme is determined as the best scheme, and the accuracy of simulation is verified by experiments.

A Life Cycle Cost Analysis Approach for Selection of a Typical Heavy Usage Multistage Centrifugal Pump

2006 ◽  
Author(s):  
Laxman Y. Waghmode ◽  
Ravindra S. Birajdar ◽  
Shridhar G. Joshi
Keyword(s):  
Life Cycle ◽  
Cost Analysis ◽  
Centrifugal Pump ◽  
Life Cycle Cost ◽  
Lifetime Cost ◽  
Maintenance Cost ◽  
Life Cycle Costs ◽  
Life Cycle Cost Analysis ◽  
Initial Cost ◽  
Multistage Centrifugal Pump

It is well known that the pumps are the largest consumers of industrial motor energy and account for more than 25% of electricity consumption. The life cycle cost of a pump is the total lifetime cost associated with procurement, installation, operation, maintenance and its disposal. For majority of heavy usage pumps, the lifetime energy and/or maintenance cost will dominate the life cycle costs. Hence a greater understanding of all the cost components making up the total life cycle costs should provide an opportunity to achieve a substantial savings in energy and maintenance costs. This will further enable optimizing pumping system efficiency and improving pump and system reliability. Therefore in this context, the life cycle cost analysis of heavy usage pumps is quite important. This paper focuses on an application of a methodology of determining the life cycle cost of a typical heavy usage multistage centrifugal pump. In this case, all the cost components associated with the pump-set have been determined and classified under different categories. The data with regard to initial investment costs, operation costs, maintenance and repair costs and disposal costs for the pump considered for this case study was collected from the concerned pump manufacturer along with the unit cost of each component, quantity used and their weights. By applying the principles of reliability and maintainability engineering and using the data obtained from the design, manufacturing and maintenance departments, the component-wise values of MTBF (Mean Time Between Failures) and MTTR (Mean Time To Repair) were estimated. The results of the life cycle cost analysis of the specimen pump were compared with the life cycle costs of similar pumps reported in the literature. From this comparison of results, it can be concluded that, the initial cost of the pump is the only a fraction of the total life cycle cost. The operating cost of the pump dominates the life cycle costs especially in case of heavy usage pumps. The maintenance cost varies approximately from 0.6 to 2.5 times the initial cost of the pump. The life cycle cost of the pump varies approximately from 12 to 33 times the initial cost of the pump. The operation and maintenance cost is almost 92 to 97 per cent of the life cycle cost. The detailed analysis carried out in this paper is expected to provide guidelines to the pump manufactures/practicing engineers in selecting a heavy usage multistage centrifugal pump based on the total lifetime cost rather than only on initial price.

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