| 摘要 |
PROBLEM TO BE SOLVED: To enhance compression efficiency while reducing a stress applied to an impeller blade. SOLUTION: Long blades 18 and short blades 19 are arranged alternatively in a compressor impeller 16. An end edge 18a in an intake inlet side of the long blade 18 is formed linearly in the each blade 18, and an end edge 18b in an intake outlet side thereof is formed curvedly to be recessed with respect to a rotational direction (an arrow mark direction A1) of the impeller 16. An intake inlet side end edge 19a of the short blade 19 is formed curvedly to be protruded with respect to the rotational direction (arrow mark directalion A1) in the each blade 19, and an end edge 19b in an intake outlet thereof is formed curvedly to be recessed with respect to the rotational direction.
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