Design Optimization of the Centrifugal Pumps via Low Fidelity Models

Siddique, M. H.; Afzal, Arshad; Samad, Abdus

doi:10.1155/2018/3987594

Cited by 17 publications

(14 citation statements)

References 93 publications

(99 reference statements)

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“…The Kriging model is utilized to relate variables and objective functions. The combination of RSM and GAs in engineering optimization problems has provided promising results (Siddique et al, 2018;Suh et al, 2019;Wenjie Wang et al, 2017;.…”

Section: -6-multi-objective Optimizationmentioning

confidence: 99%

Optimization of the centrifugal slurry pump through the splitter blades position

Abdolahnejad

Moghimi

Derakhshan

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Optimal transfer of two-phase solid-liquid flow (slurry flow) has long been a major industrial challenge. Slurry pumps are among the most common types of centrifugal pumps used to deal with this transfer issue. The approach of improving slurry pumps and consequently increasing the efficiency of a flow transmission system requires overcoming the effects of slurry flow such as the reduction in head, efficiency, and wear. This study attempts to investigate the changes in the pump head by modifying the slip factor distribution in the impeller channel. For this purpose, the effect of splitter blades on slip factor distribution to improve the pump head was investigated using numerical simulation tools and validated based on experimental test data. Next, an optimization process was used to determine the characteristics of the splitter (i.e., length, number, and environmental position of the splitter) based on a combination of experimental design methods, surface response, and genetic algorithm. The optimization results indicate that the splitters were in a relative circumferential position of 67.2% to the suction surface of the main blade. Also, the optimal number and length of splitter blades were 6 and 62.8% of the length of the main blades, respectively. Because of adding splitter blades and the reduction in the flow passage, the best efficiency point (BEP) of the slurry pump moved toward lower flow rates. The result of splitter optimization was the increase in pump head from 29.7 m to 31.7 m and the upkeep of efficiency in the initial values.

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Section: -6-multi-objective Optimizationmentioning

confidence: 99%

Optimization of the centrifugal slurry pump through the splitter blades position

Abdolahnejad

Moghimi

Derakhshan

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…BPNN has capability in arbitrary complex pattern classification and multi-dimensional function mapping [24]. Hence, we applied BPNN to establish the approximate functional relationship between the DVs and the optimization objectives to reduce the computational cost.…”

Section: Surrogate Modelmentioning

confidence: 99%

Many-Objective Hybrid Optimization Method for Impeller Profile Design of Low Specific Speed Centrifugal Pump in District Energy Systems

2021

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Low specific speed centrifugal pumps (LSSCP) are widely utilized in district energy systems to promote the integration of renewable energy. However, the performance of LSSCP becomes inefficient due to harsh operating conditions resulting in substantial increase in energy consumption. Many-objective optimization is significant in improving the performance of LSSCP and promoting the sustainability of district energy systems. Among the existing optimization methods, global optimization methods are limited by high computational cost when solving many-objective optimization problems, and gradient-based optimization methods face difficulties in locating the global optimum. In the present study, a hybrid optimization method was developed for solving many-objective optimization problems of LSSCP. The LSSCP optimization result of the hybrid algorithm was compared with that of the non-dominated sorting genetic algorithm (NSGA), so as to demonstrate the capacity of the proposed method. In the designed flow condition without cavitation, the hydraulic efficiency obtained by the hybrid optimization algorithm was found to be 9.5%, 5.4%, and 4.7% higher than those of the original, NSGA-II, and NSGA-III optimized results, respectively. The shaft power was 10.3%, 8.7% and 5.1% less than said three optimized results. The maximum turbulent kinetic energy in the flow passage obtained from the hybrid optimization was only 2.2 J/kg, which was 67% and 46% less than that of the NSGA-II and NSGA-III optimized results, respectively. In the designed flow condition with cavitation, the net positive suction head critical optimized by the hybrid model was 0.857 m, which was substantially reduced compared with the original and NSGA- II optimized results.

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“…The performance of the pump gets affected by blade profile shape of the impeller, interaction of impeller, and casing geometry. [1][2][3][4][5] Manipulating the parameters of blade shape such as inlet blade angles, outlet blade angle, blade width and wrap angles improves the performance of the pump. An increase in number of the blades has both positive and negative effect.…”

Section: Introductionmentioning

confidence: 99%

Centrifugal pump performance enhancement: Effect of splitter blade and optimization

Siddique¹,

Samad

Hossain³

2021

Proceedings of the Institution of Mechanical Engineers, Part A:

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The shape of impeller blades of a centrifugal pump affects the best efficiency point (BEP), and splitter blades improve the pump performance at BEP. In this work, multiple parameters such as number of blades, length of splitter blade, splitter blade angle at hub, and wrap angle were modified to maximize head and minimize input power. The problem was solved by a numerical and experimental approach. Initially, an impeller was designed and tested in a laboratory setup. The same impeller was simulated in a computational fluid dynamics (CFD) solver, checked the accuracy of the CFD results, optimized by an in-house surrogate-based optimization code and finally the optimal designed manufactured and tested again. The mix and match of the splitter blade with the other parameters improved the pump performance i.e. head by 8.2% and overall efficiency by 3%. The improvement was due to the reduction in pressure fluctuations and uniform blade loading throughout the impeller blade span.

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Design Optimization of the Centrifugal Pumps via Low Fidelity Models

Cited by 17 publications

References 93 publications

Optimization of the centrifugal slurry pump through the splitter blades position

Optimization of the centrifugal slurry pump through the splitter blades position

Many-Objective Hybrid Optimization Method for Impeller Profile Design of Low Specific Speed Centrifugal Pump in District Energy Systems

Centrifugal pump performance enhancement: Effect of splitter blade and optimization

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