| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a fluid channel structure which suppresses the generation of a pressure loss, and a gas turbine exhaust diffuser.SOLUTION: In a fluid channel structure, constructions 12, 13 extend in a direction intersecting with a main flow direction along a main flow of fluid E which flows in a fluid channel P from wall faces 10b, 11b forming the fluid channel P, and a cross section area of the fluid channel P is varied as progressing toward the main flow direction due to the occupation of a part of the fluid channel P by the constructions 12, 13 in a fluid channel cross section which interests with the main flow. The fluid channel structure has recess forming regions 20, 30 in which recesses 21, 22, 31 and 32 are formed at the wall faces 10b, 11b all over a range including the constructions 12, 13 in the main flow direction and a circumferential direction.</p> |
