B-14 耐低レイノルズ数遷音速圧縮機翼列の開発 : エンドウォール性能(空力II,一般講演)

概要

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As a part of an innovative aerodynamic design concept for a single stage low pressure turbine, a high turning outlet guide vane is required to remove the swirl from the hot gas. The airfoil of the vane is a highly loaded compressor airfoil that has to operate at very low Reynolds numbers (Re〜120.000). Recently published numerical design studies and experimental analysis on alternatively designed airfoils showed that blade profiles with an extreme front loaded pressure distribution are advantageous for low Reynolds number conditions. Also the advantage even held true for an increased inlet Mach number at which the peak Mach number on the airfoils reaches and exceeds the critical conditions (Mss>1.0). This paper numerically discusses about the three-dimensional performance near the end-wall, because the extreme front loaded airfoil may lead to a higher secondary flow loss than that of a controlled diffusion airfoil (CDA).
2007-09-01