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Energies 2018, 11(7), 1827;

Aerodynamic Design Optimization of a Micro Radial Compressor of a Turbocharger

Department of Mechanical Design Engineering, Kangwon National University, Samcheok 25913, Korea
Key Yang Precision Co., R&D Center, 1012-4 Eungmyeong-dong (63 Gongdan 4-gil), Gimcheon-si 39537, Korea
Author to whom correspondence should be addressed.
Received: 13 June 2018 / Revised: 9 July 2018 / Accepted: 10 July 2018 / Published: 12 July 2018
(This article belongs to the Section Energy Fundamentals and Conversion)
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This study presents an aerodynamic design optimization of a micro radial compressor impeller on a turbocharger used in a 0.8 L two-cylinder gasoline engine. In the conventional design optimization of the impeller, the hub and shroud curve of the main blade is commonly parameterized with a beta distribution, and splitter blades are generally considered short versions of the full blade. However, geometrical parameterizations in our study mainly focus on the beta distribution of a full blade, and it is parameterized differently from the conventional way. Eight parameters are selected as design variables for the beta distribution. To maximize the isentropic efficiency, design points that are created by Design of Experiment (DOE) are evaluated through single-objective optimization coupled with a non-parametric regression surrogate model. Furthermore, the splitter leading edge location on the meridional plane is investigated to enhance the performance of the impeller after the optimization process. The results show that total efficiency enhancement of approximately 2.2% is achieved. Furthermore, the findings show that a full blade beta distribution and the splitter leading edge location are sufficient parameters to optimize the impeller, and, with the proposed optimization, splitter blades are no longer copies of the full blade for each application. View Full-Text
Keywords: radial compressor; optimization; efficiency; beta distribution; impeller; splitter radial compressor; optimization; efficiency; beta distribution; impeller; splitter

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Atac, O.F.; Yun, J.-E.; Noh, T. Aerodynamic Design Optimization of a Micro Radial Compressor of a Turbocharger. Energies 2018, 11, 1827.

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