Blade, cut-back of blade or vane and gas turbine having the same
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A cut-back of a blade or vane in a gas turbine may comprise a first sidewall; a plurality of trailing ribs extended from the first sidewall and arranged along an end of the first sidewall; a second sidewall separated from the first sidewall, having a longer tail than the first sidewall and in contact with the plurality of trailing ribs; and one or more cut-back blocks extended between two trailing ribs along the inner surface of the second sidewall. The cut-back of the blade or vane may reduce the weight through the trailing ribs and the cut-back blocks formed at the trailing edge, and improve a heat transfer effect while retarding crack growth.