翼形状の能動制御による軸流形ターボ機械の低流量域特性の改善

概要

論文の詳細を見る
In order to improve spanwise deflecting flow generated near the last stage of an axial-flow turbomachinery in a partial flow rate operating range, a cascade with shape-controlled airfoils actuated by shape memory alloys (SMAs) has been developed. A two-way change in the blade shape is realized by using spring and SMA rods in which three different shapes are memorized. The flow field around a developed cascade was measured in a wind tunnel in order to determine the effect of the shape change. As a result of this study, it is proven that a cascade developed with shape controlled airfoils is capable of suppressing spanwise deflecting flow by changing the blade shape and restricting the flow passage. It is effective especially to a steam turbine in which SMA plays the roles of a temperature sensor as well as an actuator because the temperature of the exhaust steam is dependent on the operational conditions.
一般社団法人日本機械学会の論文
1996-04-25