紀要論文

ラジアルタービン羽根車上流の流れ場の数値解析 : スクロール形状とノズルベーンの影響

NUMERICAL ANALYSIS OF FLOW FIELD UPSTREAM OF RADIAL TURBINE ROTOR : INFLUENCES OF SCROLL SHAPE AND NOZZLE VANE

jpn

24368083

https://doi.org/10.15002/00025273

法政大学大学院理工学研究科

法政大学大学院紀要. 理工学研究科編

63

1

6

2022-03-24

Version of Record

In this study, the influences of the scroll shape and nozzle vane on the flow behavior at the inlet of turbine rotor of turbocharger with the variable geometry system were investigated by using commercial CFD code. The computations were performed for the simplified model which is composed of the inlet duct, the scroll, the vaned nozzle and the exhaust pipe without the turbine rotor. The computed results clarified that the tongue and the overhang shapes of the scroll deteriorated the circumferential uniformities of the physical quantities such as the flow angle and the total pressure loss at the nozzle inlet. However, the nozzle vane installed in the nozzle passage improved the circumferential uniformity at the nozzle outlet by its straightening effect. Moreover, it increased the total pressure loss at the nozzle outlet due to the circumferential nonuniformity at the nozzle inlet.

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