Numerical Analysis of Flow in Radial Turbine Rotors

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Other Title
  • ラジアルタービン内部流れの数値解析
  • ラジアルタービン内部流れの数値解析--ノズルベーン角度の影響
  • ラジアルタービン ナイブ ナガレ ノ スウチ カイセキ ノズルベーン カクド ノ エイキョウ
  • Influence of Nozzle Vane Angle
  • ノズルベーン角度の影響

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Abstract

Variable Geometry System（VGS）is widely applied to the nozzle vane for the radial inflow turbine constituting automotive turbochargers with 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 the 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.<br> In the present study, the numerical calculations were carried out for the flow in the radial turbine at three operating conditions by applying the nozzle vane exit angle set in the experimental study at the inlet boundary as the inlet boundary condition. The numerical results show the characteristic flow behavior at each operating condition.

Journal

  • Turbomachinery

    Turbomachinery 38 (8), 470-476, 2010

    Turbomachinery Society of Japan

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