| 摘要 |
A supercharger (1) is provided with a turbine (2) and a compressor (3). The turbine (2) is provided with a scroll part (flow channel) (4) formed in a spiral shape around the rotational axis of turbine blades (21). The scroll part (4) is of such a structure that the aspect ratio of the cross-sectional shape of the flow channel at an intermediate portion (43) between an inlet part (41) and an outlet part (42) is greater than the aspect ratios of the inlet part (41) and the outlet part (42). |
