Multi-Objective Aerodynamic Design Optimisation Method of Fuel Cell Centrifugal Impeller Using Modified NSGA-II Algorithm

This paper presents a modified NSGA-II algorithm based on the spatial density (SD) operator, combined with computer graphics-based surface parameterisation methods and computational fluid dynamics (CFD) simulations. This was done to optimise the multi-objective aerodynamic design of a centrifugal im...

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Bibliographic Details
Published in:Applied sciences 2021-08, Vol.11 (16), p.7659
Main Authors: Liu, Jisheng, Li, Wei, Liu, Manxian, He, Ketai, Wang, Yesong, Fang, Pengcheng
Format: Article
Language:English
Subjects:
Aerodynamics
Algorithms
centrifugal impeller
Computational fluid dynamics
Computer applications
Computer graphics
Design
Design optimization
DNSGA
Efficiency
Energy
Fluid dynamics
Fuel cells
Fuel technology
Genetic algorithms
Heuristic
Hydrodynamics
Impellers
Intelligence
Intermodal transportation
Mass flow
multi-objective aerodynamic optimisation
Multiple objective analysis
Neural networks
Optimization
Parameterization
Pressure ratio
spatial density
Technical services
Vehicles
Working conditions
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Summary:This paper presents a modified NSGA-II algorithm based on the spatial density (SD) operator, combined with computer graphics-based surface parameterisation methods and computational fluid dynamics (CFD) simulations. This was done to optimise the multi-objective aerodynamic design of a centrifugal impeller for a 100-kW vehicle-mounted fuel cell and improve the multi-conditions aerodynamic performance of the centrifugal impeller of the vehicle-mounted fuel cell (FC). The optimisation objectives are to maximise the isentropic efficiency of the rated and common operating conditions. The optimisation results showed that the efficiency of rated working conditions had an increase of 1.29%, mass flow increase of 8.8%, pressure ratio increase of 0.74% and comprehensive margin increase of 6.2%. The efficiency of common working conditions had an increase of 1.2%, mass flow increase of 9.1%, pressure ratio increase of 0.24% and comprehensive margin increase of 10%. The optimisation effect is obvious under the premise of satisfying the constraints, which proves the optimisation method’s engineering effectiveness and provides technical support and methodological research for the multi-objective aerodynamic design optimisation of centrifugal impellers for vehicle-mounted FCs.
ISSN:2076-3417
2076-3417
DOI:10.3390/app11167659