| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vane shape of a variable nozzle and a variable capacity supercharger, capable of reducing a pressure loss of the variable nozzle and improving a turbine efficiency, by inhibiting generation of a negative pressure section in the front edge side of a vane back side part, or by relaxing a velocity gradient in a nozzle channel. <P>SOLUTION: The vane shape of the variable nozzle is constructed such that a supply quantity of fluid is adjusted by turnably arranging a vane 1 having an aerofoil cross section shape in a fluid supply passage 31 of a radial turbine providing power by supplying a fluid to a moving blade. The aerofoil cross section shape of the vane 1 has a projection formed on the front edge 2 side of a belly side part 5. The projection is formed in the section constituting the nozzle channel 32 formed between the adjoining vane 1 in the fully closed state of the vane 1 in which the supply quantity of fluid is minimum. In the nozzle channel 32, a nozzle channel length ratio T expressed by length x from inlet to outlet/exit area W<SB POS="POST">out</SB>is ≥1.0. <P>COPYRIGHT: (C)2012,JPO&INPIT |
