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Research on multi-objective optimization method of Z-shaped pipeline structure based on Kriging model.
Chunya Sun1,2, Zhengdong Xiao1,2, Yanqiu Xiao3,4
1Henan Collaborative Innovation Center of Intelligent Tunnel Boring Machine, Zhengzhou University of Light Industry, Zhengzhou, 450000, China.
Scientific Reports
|November 28, 2024
Summary
This study optimizes Z-shaped slurry pipelines using computational fluid dynamics and discrete element method (CFD-DEM) simulations. The optimized design enhances sediment transport efficiency and reduces particle accumulation in dredging operations.
Area of Science:
- Engineering
- Fluid Mechanics
- Computational Science
Background:
- Slurry pipeline transportation is crucial for dredging but faces challenges in simulating particle interactions and optimizing pipeline structures.
- Accurate numerical simulations and structural optimization are needed to improve the efficiency and reliability of slurry transport systems.
Purpose of the Study:
- To investigate the performance of a Z-shaped pipeline designed with B-spline curves in a slurry circulation system.
- To develop a multi-objective optimization method for enhancing sediment-carrying capacity and reducing computational complexity.
- To analyze the impact of structural parameters on slurry flow characteristics and transportation efficiency.
Main Methods:
- Implementation of a Z-shaped continuous pipeline using B-spline curves.
- Validation of the computational fluid dynamics-discrete element method (CFD-DEM) through experimental slurry circulation.
- Integration of the Kriging surrogate model with the Non-dominated Sorting Genetic Algorithm II (NSGA-II) for multi-objective optimization.
Main Results:
- The CFD-DEM method was validated for slurry circulation experiments.
- Optimization of a Z-shaped pipeline (0.3 m inner diameter, 1.5 m axial height) for a 6.24 m slurry shield tunneling machine.
- Achieved an 8.9% increase in average particle velocity and a 21.3% reduction in particle accumulation.
Conclusions:
- The proposed multi-objective optimization method effectively improves sediment-carrying capacity and reduces computational load.
- Optimized Z-shaped pipeline structures enhance slurry transportation efficiency and minimize particle accumulation.
- Understanding the interaction between pipeline geometry and flow parameters is key to effective slurry transport design.
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