A Novel Multi-Fidelity Surrogate for Efficient Turbine Design OptimizationSource: Journal of Turbomachinery:;2023:;volume( 146 ):;issue: 004::page 41011-1DOI: 10.1115/1.4064228Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To solve the turbine design optimization problems efficiently, surrogate-based optimization algorithms are frequently used. To further reduce the cost of turbine design, the multi-fidelity surrogate (MFS)-based optimization is proposed by the researchers, who resort to augmenting the small number of expensive high-fidelity (HF) samples by a large portion of low-fidelity (LF) but cheap samples in surrogate modeling and optimization process. Nonetheless, according to our observations, the MFS-based optimization sometimes can only have better convergence rate at the early stage of optimization process, but yielding worse final solution than the single-fidelity surrogate (SFS)-based optimization that uses high-fidelity samples alone. The reason behind can be explained as follows. With the increase of HF samples in the optimization process, the LF samples can cause negative effect and therefore misleading the optimization search. To address the above issue, an ensemble weighted multi-fidelity surrogate (EMFS) is proposed. Specifically, the density-based spatial clustering of applications with noise is used to detect the region where the MFS cannot build a more accurate surrogate, and a local SFS is built there. Then, an EMFS is built by combining the MFS and SFS with adaptive weights, which is used to guide the optimization process. The related algorithm is named as multi- and single-fidelity surrogate fused optimization (MSFO). Through tests on GE-E3 blade optimization and the film cooling layout design of a turbine endwall, the effectiveness of proposed MSFO is well demonstrated.
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contributor author | Wang, Qineng | |
contributor author | Song, Liming | |
contributor author | Guo, Zhendong | |
contributor author | Li, Jun | |
contributor author | Feng, Zhenping | |
date accessioned | 2024-12-24T18:45:01Z | |
date available | 2024-12-24T18:45:01Z | |
date copyright | 12/21/2023 12:00:00 AM | |
date issued | 2023 | |
identifier issn | 0889-504X | |
identifier other | turbo_146_4_041011.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4302674 | |
description abstract | To solve the turbine design optimization problems efficiently, surrogate-based optimization algorithms are frequently used. To further reduce the cost of turbine design, the multi-fidelity surrogate (MFS)-based optimization is proposed by the researchers, who resort to augmenting the small number of expensive high-fidelity (HF) samples by a large portion of low-fidelity (LF) but cheap samples in surrogate modeling and optimization process. Nonetheless, according to our observations, the MFS-based optimization sometimes can only have better convergence rate at the early stage of optimization process, but yielding worse final solution than the single-fidelity surrogate (SFS)-based optimization that uses high-fidelity samples alone. The reason behind can be explained as follows. With the increase of HF samples in the optimization process, the LF samples can cause negative effect and therefore misleading the optimization search. To address the above issue, an ensemble weighted multi-fidelity surrogate (EMFS) is proposed. Specifically, the density-based spatial clustering of applications with noise is used to detect the region where the MFS cannot build a more accurate surrogate, and a local SFS is built there. Then, an EMFS is built by combining the MFS and SFS with adaptive weights, which is used to guide the optimization process. The related algorithm is named as multi- and single-fidelity surrogate fused optimization (MSFO). Through tests on GE-E3 blade optimization and the film cooling layout design of a turbine endwall, the effectiveness of proposed MSFO is well demonstrated. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | A Novel Multi-Fidelity Surrogate for Efficient Turbine Design Optimization | |
type | Journal Paper | |
journal volume | 146 | |
journal issue | 4 | |
journal title | Journal of Turbomachinery | |
identifier doi | 10.1115/1.4064228 | |
journal fristpage | 41011-1 | |
journal lastpage | 41011-10 | |
page | 10 | |
tree | Journal of Turbomachinery:;2023:;volume( 146 ):;issue: 004 | |
contenttype | Fulltext |