C11 Effects of Tip Clearance on the Hydraulic Performance of Mini Pump Impeller

2006 ◽  
Vol 2006.59 (0) ◽  
pp. 63-64
Author(s):  
Michihiro NISHI ◽  
Kouichi YOSHIDA ◽  
Hitoshi DOHZONO ◽  
Junichi OHKUBO
Keyword(s):  
Hydraulic Performance ◽  
Tip Clearance ◽  
Pump Impeller ◽  
Mini Pump

An Experimental Study of Cavitation in a Mixed Flow Pump Impeller

1960 ◽  
Vol 82 (4) ◽  
pp. 929-940 ◽  
Author(s):  
G. M. Wood ◽  
J. S. Murphy ◽  
J. Farquhar
Keyword(s):  
Experimental Study ◽  
Static Pressure ◽  
Hydraulic Performance ◽  
Mixed Flow ◽  
Pump Impeller ◽  
Flow Models ◽  
Cavitation Performance ◽  
Pressure Profiles ◽  
Closed Water ◽  
Flow Pump

A mixed flow impeller design was tested with six, five, and four vanes in a closed water loop to study the effects of cavitation on hydraulic performance and the results were compared with the work of other investigators. Two idealized flow models for incipient cavitation were derived to illustrate limits of cavitation design. It was found that both vane blockage and solidity effects are important when designing for optimum cavitation performance. Data showing incidence and speed effects plus the tip static pressure profiles in cavitating and noncavitating flow are also presented.

scholarly journals Research on cooperative optimization of multiphase pump impeller and diffuser based on adaptive refined response surface method

2022 ◽  
Vol 14 (1) ◽  
pp. 168781402110729
Author(s):  
Peng Cancan ◽  
Zhang Xiaodong ◽  
Gao Zhiguang ◽  
Wu Ju ◽  
Gong Yan
Keyword(s):  
Response Surface ◽  
Design Theory ◽  
Volume Fraction ◽  
Axial Flow ◽  
Hydraulic Performance ◽  
Surface Model ◽  
Pump Impeller ◽  
Multiphase Pump ◽  
Multi Objective ◽  
Optimized Model

Multiphase pumps play an important role in the exploitation of natural gas hydrate. Compared with ordinary pumps, they can handle fluids with higher gas volume fraction (GVF). Therefore, it is important to improve the performance of the pump under high GVF. A model pump is designed based on the design theory of axial flow pump and centrifugal pump inducer. The hydraulic performance of the model pump is verified by numerical simulation and experiment. The Sparse Grid method is applied to the design of experiment (DOE), and three different adaptive refined response surface methods (RSM) are applied to the build the approximate model. Refinement points and verification points are used to improve and verify the precision of the response surface, respectively. The model with high precision and high computational efficiency is obtained through comparison and analysis. The multi-objective optimization of the optimal response surface model is carried out by MOGA (Multi-Objective Genetic Algorithm) method. The pressure increment of the optimized model is increased by 38 kPa. The efficiency is significantly improved under large mass flow conditions. The hydraulic performance of the optimized model is compared with that of the basic model. And the reasons that affect the performance of the multiphase pump are analyzed.

Investigation of flow pattern and hydraulic performance of a centrifugal pump impeller through the PIV method

2020 ◽  
Vol 162 ◽  
pp. 561-574 ◽  
Author(s):  
Xiaojun Li ◽  
Hui Chen ◽  
Bo Chen ◽  
Xianwu Luo ◽  
Baofeng Yang ◽  
...  
Keyword(s):  
Flow Pattern ◽  
Centrifugal Pump ◽  
Hydraulic Performance ◽  
Pump Impeller ◽  
Piv Method ◽  
Centrifugal Pump Impeller

scholarly journals Effect of Tip Clearance on Hydraulic Performance of Water-jet Pump

2017 ◽  
Vol 916 ◽  
pp. 012020
Author(s):  
Duo Yang ◽  
Zuodong Huang ◽  
Ang Guo ◽  
Jiawei Xu ◽  
Lei Jiao
Keyword(s):  
Hydraulic Performance ◽  
Water Jet ◽  
Tip Clearance ◽  
Jet Pump

scholarly journals Effect of Tip Clearance on the Internal Flow and Hydraulic Performance of a Three-Bladed Inducer

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Yanxia Fu ◽  
Jianping Yuan ◽  
Shouqi Yuan ◽  
Giovanni Pace ◽  
Luca d’Agostino
Keyword(s):  
Pressure Rise ◽  
Internal Flow ◽  
Hydraulic Performance ◽  
Operating Conditions ◽  
Tip Clearance ◽  
Hydraulic Efficiency ◽  
Tip Leakage ◽  
Ansys Cfx ◽  
Blade Tip ◽  
Flow Through

The influence of the tip clearance on the internal flow and hydraulic performances of a 3-bladed inducer, designed at ALTA, Pisa, Italy, are investigated both experimentally and numerically. Two inducer configurations with different blade tip clearances, one about equal to the nominal value and the other 2.5 times larger, are considered to analyze tip leakage effects. The 3D numerical model developed in ANSYS CFX to simulate the flow through the inducer with 2 different clearances under different operating conditions is illustrated. The internal flow fields and hydraulic performance predicted by the CFD model under different operating conditions are compared with the corresponding experimental data obtained from the inducer tests. As expected, both experimental and numerical results indicate that higher pressure rise and hydraulic efficiency are obtained from the inducer configuration with the nominal tip clearance.

Performance Characteristics of a Centrifugal Pump Impeller With Running Tip Clearance Pumping Solid-Liquid Mixtures

2001 ◽  
Vol 123 (3) ◽  
pp. 532-538 ◽  
Author(s):  
Tahsin Engin ◽  
Mesut Gur
Keyword(s):  
Centrifugal Pump ◽  
Liquid Mixtures ◽  
Reduction Factor ◽  
Tip Clearance ◽  
Performance Characteristics ◽  
Solid Concentration ◽  
Centrifugal Pumps ◽  
Pump Impeller ◽  
Solid Liquid ◽  
Centrifugal Pump Impeller

This paper presents extensive results on the performance of an unshrouded centrifugal pump impeller handling solid-liquid mixtures. The effect of the clearance between the impeller tip and the casing and of the solid concentration, density and mean diameter on the pump performance characteristics is investigated. The results are discussed and utilized, together with data available in the literature, to establish a correlation allowing the prediction of the head reduction factor for shrouded/unshrouded impeller centrifugal pumps handling solid-liquid mixtures. The predictions made with the proposed correlation show a better agreement with experimental results than previous ones.

scholarly journals The Optimal Hydraulic Design of Centrifugal Impeller Using Genetic Algorithm with BVF

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Xin Zhou ◽  
Yongxue Zhang ◽  
Zhongli Ji ◽  
Hucan Hou
Keyword(s):  
Genetic Algorithm ◽  
Design Theory ◽  
Hydraulic Performance ◽  
Design Parameters ◽  
Centrifugal Impeller ◽  
Hydraulic Loss ◽  
Operation Condition ◽  
Pump Impeller ◽  
Hydraulic Design ◽  
Vorticity Flux

Derived from idea of combining the advantages of two-dimensional hydraulic design theory, genetic algorithm, and boundary vorticity flux diagnosis, an optimal hydraulic design method of centrifugal pump impeller was developed. Given design parameters, the desired optimal centrifugal impeller can be obtained after several iterations by this method. Another 5 impellers with the same parameters were also designed by using single arc, double arcs, triple arcs, logarithmic spiral, and linear-variable angle spiral as blade profiles to make comparisons. Using Reynolds averaged N-S equations with a RNGk-εtwo-equation turbulence model and log-law wall function to solve 3D turbulent flow field in the flow channel between blades of 6 designed impellers by CFD code FLUENT, the investigation on velocity distributions, pressure distributions, boundary vorticity flux distributions on blade surfaces, and hydraulic performance of impellers was presented and the comparisons of impellers by different design methods were demonstrated. The results showed that the hydraulic performance of impeller designed by this method is much better than the other 5 impellers under design operation condition with almost the same head, higher efficiency, and lower rotating torque, which implied less hydraulic loss and energy consumption.

scholarly journals Effect of blade thickness on hydraulic performance of a mixed-flow pump impeller

2019 ◽  
Vol 240 ◽  
pp. 032035 ◽  
Author(s):  
Yong-In Kim ◽  
Sung Kim ◽  
Hyeon-Mo Yang ◽  
Kyoung-Yong Lee ◽  
Jin-Hyuk Kim ◽  
...  
Keyword(s):  
Hydraulic Performance ◽  
Mixed Flow ◽  
Pump Impeller ◽  
Blade Thickness ◽  
Flow Pump

Tip-Clearance Effects in Centrifugal Pumps

1965 ◽  
Vol 87 (4) ◽  
pp. 932-939 ◽  
Author(s):  
G. M. Wood ◽  
H. Welna ◽  
R. P. Lamers
Keyword(s):  
Centrifugal Pump ◽  
Hydraulic Performance ◽  
Tip Clearance ◽  
Centrifugal Pumps ◽  
Design Models ◽  
Cavitation Performance

Several design models of centrifugal pump impellers were tested in water to determine tip-clearance effects on noncavitating and cavitating performance. Although most of these impellers were designed without tip shrouds, three direct comparisons for shrouded versus unshrouded models are included. Within the scope of this investigation, varying degrees of tip clearance produced dissimilar trends in the hydraulic performance for the different design models tested. Fully shrouded impellers consistently yielded inferior cavitation performance as compared to unshrouded versions.

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