Adjoint-Based Design Optimization of a Volute for a Radial Compressor
Numerical optimization methods are widely used for designing turbomachinery components due to the cost and time savings they can provide. In the available literature, the shape optimization of radial compressors mainly focuses on improving the impeller alone. However, it is well-established knowledg...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-10-01
|
| Series: | International Journal of Turbomachinery, Propulsion and Power |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2504-186X/8/4/41 |
| _version_ | 1797380589324599296 |
|---|---|
| author | Romain Hottois Arnaud Châtel Tom Verstraete |
| author_facet | Romain Hottois Arnaud Châtel Tom Verstraete |
| author_sort | Romain Hottois |
| collection | DOAJ |
| description | Numerical optimization methods are widely used for designing turbomachinery components due to the cost and time savings they can provide. In the available literature, the shape optimization of radial compressors mainly focuses on improving the impeller alone. However, it is well-established knowledge that the volute plays a key role in the overall performance of the compressor. The aim of the present paper is to perform an adjoint-based optimization of a volute that is designed for the SRV2-O compressor. The CAD model was first created by using the parametrization of 33 design parameters. Then, a butterfly topology was applied to mesh the computational domain with a multi-block structured grid, and an elliptic smoothing procedure was used to improve the quality of the fluid grid. A steady-state RANS CFD solver with a Spalart-Allmaras turbulence model was used to solve the Navier–Stokes equations, and then the flow sensitivities were computed with an adjoint solver. The objective function consists of minimizing the loss coefficient of the volute. The optimization is performed to obtain an improved design with a 14% loss reduction. A detailed flow and design analysis is carried out to highlight the loss reduction mechanisms, followed by the optimizer. Finally, the compressor map of the full stage is compared between the baseline and the optimized volute from the CFD simulations using a mixing plane interface. This research demonstrates the successful use of a gradient-based optimization technique to improve the volute of a radial compressor and opens the door towards simultaneously optimizing the wheel and the volute. |
| first_indexed | 2024-03-08T20:40:29Z |
| format | Article |
| id | doaj.art-0e739920d8234e3580572a8b2f6a5679 |
| institution | Directory Open Access Journal |
| issn | 2504-186X |
| language | English |
| last_indexed | 2024-03-08T20:40:29Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Turbomachinery, Propulsion and Power |
| spelling | doaj.art-0e739920d8234e3580572a8b2f6a56792023-12-22T14:15:39ZengMDPI AGInternational Journal of Turbomachinery, Propulsion and Power2504-186X2023-10-01844110.3390/ijtpp8040041Adjoint-Based Design Optimization of a Volute for a Radial CompressorRomain Hottois0Arnaud Châtel1Tom Verstraete2Turbomachinery & Propulsion Department, von Karman Institute, 1640 Rhode-Saint-Genèse, BelgiumTurbomachinery & Propulsion Department, von Karman Institute, 1640 Rhode-Saint-Genèse, BelgiumTurbomachinery & Propulsion Department, von Karman Institute, 1640 Rhode-Saint-Genèse, BelgiumNumerical optimization methods are widely used for designing turbomachinery components due to the cost and time savings they can provide. In the available literature, the shape optimization of radial compressors mainly focuses on improving the impeller alone. However, it is well-established knowledge that the volute plays a key role in the overall performance of the compressor. The aim of the present paper is to perform an adjoint-based optimization of a volute that is designed for the SRV2-O compressor. The CAD model was first created by using the parametrization of 33 design parameters. Then, a butterfly topology was applied to mesh the computational domain with a multi-block structured grid, and an elliptic smoothing procedure was used to improve the quality of the fluid grid. A steady-state RANS CFD solver with a Spalart-Allmaras turbulence model was used to solve the Navier–Stokes equations, and then the flow sensitivities were computed with an adjoint solver. The objective function consists of minimizing the loss coefficient of the volute. The optimization is performed to obtain an improved design with a 14% loss reduction. A detailed flow and design analysis is carried out to highlight the loss reduction mechanisms, followed by the optimizer. Finally, the compressor map of the full stage is compared between the baseline and the optimized volute from the CFD simulations using a mixing plane interface. This research demonstrates the successful use of a gradient-based optimization technique to improve the volute of a radial compressor and opens the door towards simultaneously optimizing the wheel and the volute.https://www.mdpi.com/2504-186X/8/4/41turbomachinerydesign optimizationadjoint methodsradial compressorvolute |
| spellingShingle | Romain Hottois Arnaud Châtel Tom Verstraete Adjoint-Based Design Optimization of a Volute for a Radial Compressor International Journal of Turbomachinery, Propulsion and Power turbomachinery design optimization adjoint methods radial compressor volute |
| title | Adjoint-Based Design Optimization of a Volute for a Radial Compressor |
| title_full | Adjoint-Based Design Optimization of a Volute for a Radial Compressor |
| title_fullStr | Adjoint-Based Design Optimization of a Volute for a Radial Compressor |
| title_full_unstemmed | Adjoint-Based Design Optimization of a Volute for a Radial Compressor |
| title_short | Adjoint-Based Design Optimization of a Volute for a Radial Compressor |
| title_sort | adjoint based design optimization of a volute for a radial compressor |
| topic | turbomachinery design optimization adjoint methods radial compressor volute |
| url | https://www.mdpi.com/2504-186X/8/4/41 |
| work_keys_str_mv | AT romainhottois adjointbaseddesignoptimizationofavoluteforaradialcompressor AT arnaudchatel adjointbaseddesignoptimizationofavoluteforaradialcompressor AT tomverstraete adjointbaseddesignoptimizationofavoluteforaradialcompressor |