LAPSE:2023.27598
Published Article
LAPSE:2023.27598
Optimization of Return Channels of High Flow Rate Centrifugal Compressor Stages Using CFD Methods
April 4, 2023
Abstract
Calculations performed with modern CFD programs aid in optimizing flow paths of centrifugal compressors. Characteristics of stator elements of flow paths, calculated via CFD methods, are considered quite accurate. We present optimized return channels (RCh) of three model industrial compressor stages with vaneless diffusers. A parameterized model was created for optimization. The MOGA (Multi-Objective Genetic Algorithm) optimization method was applied in the Direct Optimization program of the ANSYS (Analysis System) software package. Optimization objects were return channels of the stages with high flow rate 0.15. The stages have three different loading factors 0.45, 0.60, 0.70. The optimization goal was to achieve the minimum loss coefficient at the design point. During the optimization process, we varied the following: the number of vanes, the inlet angle of the vanes, the height of the vanes at the inlet, the outer and inner radii of curvature of the U-bend. The outlet angle of the vanes was selected to minimize outlet circumferential velocity. In comparison with preliminary design, the optimized RCh are more efficient across the entire range of flow rates. The optimization reduced the loss coefficient by 20% at the design flow rate.
Calculations performed with modern CFD programs aid in optimizing flow paths of centrifugal compressors. Characteristics of stator elements of flow paths, calculated via CFD methods, are considered quite accurate. We present optimized return channels (RCh) of three model industrial compressor stages with vaneless diffusers. A parameterized model was created for optimization. The MOGA (Multi-Objective Genetic Algorithm) optimization method was applied in the Direct Optimization program of the ANSYS (Analysis System) software package. Optimization objects were return channels of the stages with high flow rate 0.15. The stages have three different loading factors 0.45, 0.60, 0.70. The optimization goal was to achieve the minimum loss coefficient at the design point. During the optimization process, we varied the following: the number of vanes, the inlet angle of the vanes, the height of the vanes at the inlet, the outer and inner radii of curvature of the U-bend. The outlet angle of the vanes was selected to minimize outlet circumferential velocity. In comparison with preliminary design, the optimized RCh are more efficient across the entire range of flow rates. The optimization reduced the loss coefficient by 20% at the design flow rate.
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Keywords
centrifugal compressor, loss coefficient, Optimization, return channel, U-bend
Subject
Suggested Citation
Galerkin Y, Rekstin A, Marenina L, Drozdov A, Solovyeva O, Semenovskiy V. Optimization of Return Channels of High Flow Rate Centrifugal Compressor Stages Using CFD Methods. (2023). LAPSE:2023.27598
Author Affiliations
Galerkin Y: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia [ORCID]
Rekstin A: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia [ORCID]
Marenina L: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia [ORCID]
Drozdov A: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia; Higher School of Power Engineering, Institute of Energy, Peter the Great St.Pe
Solovyeva O: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia; Higher School of Hydrotechnical and Power Engineering, Institute of Civil Engi
Semenovskiy V: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia
Rekstin A: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia [ORCID]
Marenina L: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia [ORCID]
Drozdov A: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia; Higher School of Power Engineering, Institute of Energy, Peter the Great St.Pe
Solovyeva O: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia; Higher School of Hydrotechnical and Power Engineering, Institute of Civil Engi
Semenovskiy V: National Technological Initiative Center of Excellence in New Manufacturing Technologies, Peter the Great St.Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia
Journal Name
Energies
Volume
13
Issue
22
Article Number
E5968
Year
2020
Publication Date
2020-11-16
ISSN
1996-1073
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Original Submission
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PII: en13225968, Publication Type: Journal Article
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LAPSE:2023.27598
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https://doi.org/10.3390/en13225968
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