| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem wherein a fine water droplet forms a water film once and becomes a large water droplet later in this case when the fine water droplet is generated in steam large in wetness and flowing at a high speed, and the fine water droplet becomes the large water droplet soon and crashes into a rear moving blade, and becomes the cause of erosion. Ž<P>SOLUTION: A porous material has an infinite number of very small pores inside, and the surface area possessed by the infinite number of pores is very large. Thus, the porous material has various characteristics, but has large water absorbing performance by a capillary phenomenon among these. At the same time, heat exchange performance is very excellent with its wide surface area. That is, since the surface area contacting with water and air is very large, a high heat conductive porous material is a highly efficient water absorber, and at the same time, is a high performance heat exchanger. Thus, the porous material is arranged on a stator vane and a stator vane outer ring peripheral surface, and a hydrophilic property is imparted. When heating the high heat conductive porous material by inserting a pipe into the stator vane of a steam turbine or in a hollow shape, the water taken in the porous material repeats water absorption and evaporation, and generation of a water film of a vane surface being the cause of generating the water droplet is eliminated. Thus, generation of the large water droplet can be surely eliminated. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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