Numerical Analysis of Flow in Radial Turbine (Effects of Nozzle Vane Angle on Internal Flow)

Variable Geometry System (VGS) is widely applied to the nozzle vane for the radial inflow turbine constituting automotive turbochargers for the purpose of optimizing the power output at each operating condition. In order to improve the performance of radial turbines with VGS, it is necessary to clar...

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Published inInternational journal of fluid machinery and systems Vol. 9; no. 2; pp. 137 - 142
Main Authors OTSUKA, Kenta, KOMATSU, Tomoya, TSUJITA, Hoshio, YAMAGUCHI, Satoshi, YAMAGATA, Akihiro
Format Journal Article
LanguageKorean
Published 2016
Subjects
Numerical Analysis
Turbocharger
Secondary Flow
Radial Turbine
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Summary:Variable Geometry System (VGS) is widely applied to the nozzle vane for the radial inflow turbine constituting automotive turbochargers for the purpose of optimizing the power output at each operating condition. In order to improve the performance of radial turbines with VGS, it is necessary to clarify the influences of the setting angle of nozzle vane on the internal flow of radial turbine. However, the experimental measurements are considered to be difficult for the flow in radial turbines because of the small size and the high rotational speed. In the present study, the numerical calculations were carried out for the flow in the radial turbine at three operating conditions by applying the corresponding nozzle vane exit angles, which were set up in the experimental study, as the inlet boundary condition. The numerical results revealed the characteristic flow behaviors at each operating condition.
Bibliography:KISTI1.1003/JNL.JAKO201625058598005
ISSN:1882-9554