Turbine Performance of Variable Geometry Turbocharger Applied to Small Gasoline Engine Considering Heat Transfer Effect
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 effe...
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2025-07-01
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| Online Access: | https://www.mdpi.com/1996-1073/18/14/3775 |
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| author | Jeong-Eui Yun Joon-Young Shin Cartur Harsito Gi-Yong Kim Hyung-Jun Kim |
| author_facet | Jeong-Eui Yun Joon-Young Shin Cartur Harsito Gi-Yong Kim Hyung-Jun Kim |
| author_sort | Jeong-Eui Yun |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-2be7d2b0efd848eaab2abea9b62cab7a |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-2be7d2b0efd848eaab2abea9b62cab7a2025-08-20T03:58:26ZengMDPI AGEnergies1996-10732025-07-011814377510.3390/en18143775Turbine Performance of Variable Geometry Turbocharger Applied to Small Gasoline Engine Considering Heat Transfer EffectJeong-Eui Yun0Joon-Young Shin1Cartur Harsito2Gi-Yong Kim3Hyung-Jun Kim4Department Mechanical Engineering, Kangwon National University, Samcheok-si 25913, Gangwon-do, Republic of KoreaDepartment of Mechanical Vehicle Engineering, Kangwon National University, Samcheok-si 25913, Gangwon-do, Republic of KoreaDepartment of Mechanical Computer Industrial Management Engineering, Kangwon National University, Samcheok-si 25913, Gangwon-do, Republic of KoreaR&D Center, Keyyang Precision Co., Ltd., Gimcheon-si 39537, Geyeongsangbuk-do, Republic of KoreaR&D Center, Keyyang Precision Co., Ltd., Gimcheon-si 39537, Geyeongsangbuk-do, Republic of KoreaThe 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.https://www.mdpi.com/1996-1073/18/14/3775variable geometry turbochargerturbine performancevane position angleentropy production |
| spellingShingle | Jeong-Eui Yun Joon-Young Shin Cartur Harsito Gi-Yong Kim Hyung-Jun Kim Turbine Performance of Variable Geometry Turbocharger Applied to Small Gasoline Engine Considering Heat Transfer Effect Energies variable geometry turbocharger turbine performance vane position angle entropy production |
| title | Turbine Performance of Variable Geometry Turbocharger Applied to Small Gasoline Engine Considering Heat Transfer Effect |
| title_full | Turbine Performance of Variable Geometry Turbocharger Applied to Small Gasoline Engine Considering Heat Transfer Effect |
| title_fullStr | Turbine Performance of Variable Geometry Turbocharger Applied to Small Gasoline Engine Considering Heat Transfer Effect |
| title_full_unstemmed | Turbine Performance of Variable Geometry Turbocharger Applied to Small Gasoline Engine Considering Heat Transfer Effect |
| title_short | Turbine Performance of Variable Geometry Turbocharger Applied to Small Gasoline Engine Considering Heat Transfer Effect |
| title_sort | turbine performance of variable geometry turbocharger applied to small gasoline engine considering heat transfer effect |
| topic | variable geometry turbocharger turbine performance vane position angle entropy production |
| url | https://www.mdpi.com/1996-1073/18/14/3775 |
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