FIELD: turbine engineering. SUBSTANCE: blade has root forming taper surface of flow path, feather with inner surface, and air-flow edge with slit. Root has chamber communicating with inner surface. Chamber wall forming flow path surface and abutting against concave part of feather is perforated on its taper section. Inner surface of end-part feather communicates with radial clearance. EFFECT: improved turbine efficiency. 2 cl, 4 dwg
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