FIELD: turbines or turbomachines.
SUBSTANCE: cooled gas turbine blade comprises a blade body with an inlet, a trough, a back, inlet and outlet edges, a cooling channel with partitions and deflectors. There are holes for cooling air supply on blade surface. An insert in the form of a cylindrical rotary valve is installed in the cooling channel. In the inlet hole there is a petal valve made from material having shape memory effect. Cylindrical rotary valve is equipped with rotary composite axis fixed by its one end in blade body and by its other end connected with cylindrical rotary valve. Rotary composite axis consists of sections and is made of material having shape memory effect. As material with shape memory effect, alloys based on iron and nickel can be used.
EFFECT: invention is aimed at improvement of turbine efficiency at variable modes.
1 cl, 6 dwg
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