Secondary Flow in Compressor Cascade of Small-Aspect-Ratio Blades.

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  • アスペクト比の小さい翼列の二次流れに関する研究
  • アスペクトヒ ノ チイサイ ヨクレツ ノ 2ジ ナガレ ニカンスルケンキュウ

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Abstract

An experimental investigation and numerical prediction were carried out to study the effect of aspect ratio, pitch ratio and stagger angle on the loss, turning angle and behavior of secondary flow of a low-speed, straight, low-aspect-ratio compressor cascade. A finite-element full 3-D incompressible Navier-Stokes solver was used, which gives accurate secondary flow prediction in a cascade. Experimental results are presented in the form of pitch-averaged spanwise distributions of losses and turning angles. This solver has been validated by considering the experimental results. A large difference in the spanwise turning angle distribution pattern in the vicinity of the sidewall was observed between the two cascades with different stagger angles.

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