| 摘要 |
<p>A gas turbine cooling stationary blade (30), in which an interior of the blade and an inner shroud are all cooled by steam without the use of air, and which is provided with steam passages (33A, 33B, 33C, 33D, 33E, 33F). A cooling steam (39) flows in from the steam passage (33A) on a leading edge side via an outer shroud, passes successively through the steam passages (33B, 33C, 33D, 33E) to flow into the steam passage (33F) on a trailing edge side to be recovered from an upper portion of the steam passage (33F) via the outer shroud to steam cool an interior of the blade. A part of the steam from the steam passage (33A) enters the inner shroud (31), enters a steam passage (20) from a steam inflow passage (22), branches to the right and left to pass through both ends of the steam passage, and flows into the steam passage (33F) on the trailing edge side from a steam outflow passage (21). Not only the interior of the blade but also an interior of the inner shroud (31) is cooled by steam to eliminate the need of cooling air.</p> |
