Multi-Condition Optimization of Cavitation Performance on a Double-Suction Centrifugal Pump Based on ANN and NSGA-II

Double-suction centrifugal pumps form an integral part of power plant systems in maintaining operational stability. However, there has been a common problem of achieving a better cavitation performance over a wider operating range because the traditional approach for impeller design often leads to the design effect not meeting the operational needs at off-design conditions. In addressing the problem, an optimization scheme was designed with the hub and shroud inlet angles of the double-suction impeller to minimize the suction performance at non-design flow conditions. A practical approach that speeds up the cavitation simulation process was applied to solve the experimental design, and a multi-layer feed forward artificial neural network (ANN) was combined with the non-dominated sorting genetic algorithm II to solve the multi-objective problem into three-dimensional (3D) Pareto optimal solutions that meet the optimization objective. At the design point, the suction performance was improved by 6.9%. At non-design flow conditions, the cavitation performance was improved by 3.5% at 1.2Qd overload condition, 4% at 0.8Qd, and 5% at 0.6Qd. Additionally, there was significant reduction in the attached cavity distribution in the impeller and suction domains when the optimized model was compared to the original model at off-design points. Finally, the optimization established a faster method for a three-objective optimization of cavitation performance using ANN and 3D Pareto solutions.

[1]  Fan Zhang,et al.  A systematic investigation on flow characteristics of impeller passage in a nuclear centrifugal pump under cavitation state , 2016 .

[2]  Wei Yang,et al.  Pressure Fluctuation and Flow Characteristics in a Two-Stage Double-Suction Centrifugal Pump , 2019, Symmetry.

[3]  Jianping Yuan,et al.  Unsteady flow characteristics and cavitation prediction in the double-suction centrifugal pump using a novel approach , 2020, Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy.

[4]  Ji Pei,et al.  Multi-Objective Shape Optimization on the Inlet Pipe of a Vertical Inline Pump , 2019, Journal of Fluids Engineering.

[5]  C. Kang,et al.  The influence of blade configuration on cavitation performance of a condensate pump , 2017 .

[6]  Wenjie Wang,et al.  Artificial Neural Networks Approach for a Multi-Objective Cavitation Optimization Design in a Double-Suction Centrifugal Pump , 2019, Processes.

[7]  Lei Tan,et al.  Multiparameter and multiobjective optimization design of centrifugal pump based on orthogonal method , 2017 .

[8]  F. Menter Two-equation eddy-viscosity turbulence models for engineering applications , 1994 .

[9]  Ran Tao,et al.  Multi-objective optimization of double suction centrifugal pump , 2018 .

[10]  Aydın Hacı Dönmez,et al.  The Effect of Inlet Blade Angle Variation on Cavitation Performance of a Centrifugal Pump: A Parametric Study , 2018, Journal of Fluids Engineering.

[11]  Majeed Koranteng Osman,et al.  A Practical Method for Speeding up the Cavitation Prediction in an Industrial Double-Suction Centrifugal Pump , 2019, Energies.

[12]  Yoshinobu Tsujimoto,et al.  Influence of Flow Coefficient and Flow Structure on Rotational Cavitation in Inducer , 2012 .

[13]  Majeed Koranteng Osman,et al.  Multiparameter optimization for the nonlinear performance improvement of centrifugal pumps using a multilayer neural network , 2019, Journal of Mechanical Science and Technology.

[14]  Mehrdad Zangeneh,et al.  Parametric Design of a Waterjet Pump by Means of Inverse Design, CFD Calculations and Experimental Analyses , 2010 .

[15]  F. Bakir,et al.  Comparison of Computational Results Obtained From a Homogeneous Cavitation Model With Experimental Investigations of Three Inducers , 2006 .

[16]  Ji Pei,et al.  Application of different surrogate models on the optimization of centrifugal pump , 2016 .

[17]  Fujun Wang,et al.  Comprehensive Numerical Investigations of Unsteady Internal Flows and Cavitation Characteristics in Double-Suction Centrifugal Pump , 2017 .

[18]  Majeed Koranteng Osman,et al.  Experimental investigation of the nonlinear pressure fluctuations in a residual heat removal pump , 2019, Annals of Nuclear Energy.

[19]  Ji Pei,et al.  Cavitation optimization for a centrifugal pump impeller by using orthogonal design of experiment , 2017 .

[20]  Jianping Yuan,et al.  Numerical simulation of leading edge cavitation within the whole flow passage of a centrifugal pump , 2013 .

[21]  T. Simpson,et al.  Comparative studies of metamodelling techniques under multiple modelling criteria , 2001 .

[22]  Fan Zhang,et al.  Performance Prediction Based on Effects of Wrapping Angle of a Side Channel Pump , 2019 .

[23]  Jianping Yuan,et al.  Flow loss analysis of a two-stage axially split centrifugal pump with double inlet under different channel designs , 2019, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science.

[24]  Laura L. Pauley,et al.  Performance Analysis of Cavitating Flow in Centrifugal Pumps Using Multiphase CFD , 2002 .