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Turbine Performance of Variable Geometry Turbocharger Applied to Small Gasoline Engine Considering Heat Transfer Effect

Author

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  • Jeong-Eui Yun

    (Department Mechanical Engineering, Kangwon National University, Samcheok-si 25913, Gangwon-do, Republic of Korea)

  • Joon-Young Shin

    (Department of Mechanical Vehicle Engineering, Kangwon National University, Samcheok-si 25913, Gangwon-do, Republic of Korea)

  • Cartur Harsito

    (Department of Mechanical Computer Industrial Management Engineering, Kangwon National University, Samcheok-si 25913, Gangwon-do, Republic of Korea)

  • Gi-Yong Kim

    (R&D Center, Keyyang Precision Co., Ltd., Gimcheon-si 39537, Geyeongsangbuk-do, Republic of Korea)

  • Hyung-Jun Kim

    (R&D Center, Keyyang Precision Co., Ltd., Gimcheon-si 39537, Geyeongsangbuk-do, Republic of Korea)

Abstract

The performance of the turbine in a variable geometry turbocharger (VGT) may be affected by changes in the vane operating angle and heat transfer loss during operation. However, existing studies have been conducted under the assumption of an adiabatic process. In this study, we investigated the effect of heat transfer between all working fluids and a VGT structure when using computational fluid dynamics to evaluate turbine performance. Through this study, we confirmed that when heat transfer was considered, the turbine efficiency decreased by approximately 2–6%, depending on the vane position angle change, compared to when heat transfer was not considered. In addition, the total entropy production ratio, which represented the flow loss in the turbine during operation, increased by approximately 0.2–0.5% when heat transfer was considered. In conclusion, the findings confirmed that the heat transfer phenomenon directly affected the efficiency and flow loss during the turbine performance evaluation process.

Suggested Citation

  • Jeong-Eui Yun & Joon-Young Shin & Cartur Harsito & Gi-Yong Kim & Hyung-Jun Kim, 2025. "Turbine Performance of Variable Geometry Turbocharger Applied to Small Gasoline Engine Considering Heat Transfer Effect," Energies, MDPI, vol. 18(14), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:14:p:3775-:d:1703180
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    References listed on IDEAS

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    1. Wang, Zhiqi & Xie, Baoqi & Xia, Xiaoxia & Luo, Lan & Yang, Huya & Li, Xin, 2023. "Entropy production analysis of a radial inflow turbine with variable inlet guide vane for ORC application," Energy, Elsevier, vol. 265(C).
    2. Serrano, José Ramón & Piqueras, Pedro & De la Morena, Joaquín & Gómez-Vilanova, Alejandro & Guilain, Stéphane, 2021. "Methodological analysis of variable geometry turbine technology impact on the performance of highly downsized spark-ignition engines," Energy, Elsevier, vol. 215(PB).
    3. Feneley, Adam J. & Pesiridis, Apostolos & Andwari, Amin Mahmoudzadeh, 2017. "Variable Geometry Turbocharger Technologies for Exhaust Energy Recovery and Boosting‐A Review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 71(C), pages 959-975.
    4. Zhou, Ling & Hang, Jianwei & Bai, Ling & Krzemianowski, Zbigniew & El-Emam, Mahmoud A. & Yasser, Eman & Agarwal, Ramesh, 2022. "Application of entropy production theory for energy losses and other investigation in pumps and turbines: A review," Applied Energy, Elsevier, vol. 318(C).
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