| 摘要 |
A fluid machine according to an embodiment includes a sealing portion which is formed of an annular minute gap between a rotating portion provided with a plurality of 5 blades and an annular member disposed circumferentially at one ends of the blades and a stationary portion arranged in opposition to the annular member, wherein a wall portion of the annular member or the stationary portion configuring the sealing portion has at least one groove 10 portion circumferentially which is formed of a shape having one curve along the surface of the wall portion and at least two sides in a horizontal cross section; and an angle, which is formed between a side of the groove portion on the most upstream side with respect to a 15 flowing direction of a leakage flow flowing circumferentially in the horizontal cross section and a tangent to the curve at an intersection of the end portion on the upstream side of the side with the curve, is in a range of 150 or more and 400 or less. 4920497 _1 (GHMatters) P87783.AU.1 19/12/13 31 N / ~ K / - .24 K~ .4' / N> / A .4, ,/4 . /4' /4' ~, -q./ 7. 15- ,7 I 4' - 4 * / I 4, ~> 6' |
