B-16 粗さ要素による低圧タービン翼面上剥離泡制御と空力性能改善の可能性(空力III,一般講演)

概要

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Demand for highly loaded turbine blades under the low Reynolds number condition has prompted studies on how to avoid, at least minimize, boundary layer separation or separation bubble on the blade suction surface, which otherwise induces the significant aerodynamic loss. This study carries out experimental investigation of aerodynamic effects of surface roughness elements on the suction surface of highly loaded LP turbine blades, where an isolated two-dimensional thin wire is mainly used as the roughness element. The purpose of this study is to see whether such discrete roughness elements, which protrude into the flow through the boundary layer, could have any positive impact on the separation or separation bubble so as to reduce the aerodynamic loss. Quite a few test cases are executed by changing the diameter and/or position of the thin wire. In addition, three-dimensional configurations of short wires are also examined.
公益社団法人日本ガスタービン学会の論文
2007-09-01