| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust gas turbine 4 which can suppress the lowering of turbine efficiency.SOLUTION: A turbine blade 22 of an exhaust gas turbine 4 has a short blade 23 whose blade height at a leading edge LE is low, and a long blade 24 whose blade height at the leading edge LE is high. The short blade 23 and the long blade 24 are alternately arranged an equal interval. In a scroll flow passage 19 which is divided to a first scroll flow passage 19a and a second scroll flow passage 19b by a bulkhead 7a, an outlet port of the first scroll flow passage 19a is formed while opposing the leading edge LE of the short blade 23, and an outlet port of the second scroll flow passage 19b is formed while opposing the leading edge LE of the long blade 24 in a range higher than the blade height of the short blade 23. According to this constitution, since an inter-blade flow passage can be formed from the leading edge LE of the long blade 24 up to a trailing edge TE responding to the second scroll flow passage 19b, turbine efficiency is improved.SELECTED DRAWING: Figure 1 |
