| 摘要 |
FIELD: mechanical engineering; turbines. ^ SUBSTANCE: proposed cooled blade of turbine has feather with partition in its space and cooling channels from side of suction face and pressure surface of blade and root with cooling air supply channels. Channels of cooling air from side of pressure surface are located between leading and trailing edges. Cooling air channels from side of suction face communicate with cooling air supply channels and are made in height of blade feather with turning to leading edge. Ribs are arranged in cooling channels. Ribs from side of pressure surface are arranged from leading edge along length of outer profile of feather at distance equal to or greater than 0.1 of chord of feather profile, and ribs from side of suction face are made curved, being arranged at distance equal to or greater than 0.25 of height of blade feather over leading edge from root part. Thickness of wall between two adjacent cooling channels from side of suction face in preset section is 0.4-1.2 of medium thickness of wall of suction face of feather in place of location of channels. Spaces between adjacent ribs located in channels from side of pressure surface communicate through holes with cooling channel from side of suction face nearest to trailing edge. ^ EFFECT: improved efficiency of cooling. ^ 10 cl, 11 dwg |
