Aerodynamic Design Optimization of a Micro Radial Compressor of a Turbocharger

Omer Faruk Atac, Jeong-Eui Yun and Taehyun Noh
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Omer Faruk Atac: Department of Mechanical Design Engineering, Kangwon National University, Samcheok 25913, Korea
Jeong-Eui Yun: Department of Mechanical Design Engineering, Kangwon National University, Samcheok 25913, Korea
Taehyun Noh: Key Yang Precision Co., R&D Center, 1012-4 Eungmyeong-dong (63 Gongdan 4-gil), Gimcheon-si 39537, Korea

Energies, 2018, vol. 11, issue 7, 1-18

Abstract: 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.

Keywords: radial compressor; optimization; efficiency; beta distribution; impeller; splitter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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