关键词: 压气机叶片;前缘;带平台圆弧形前缘+;数值仿真

Abstract: To improve the leading edge shape, weaken the suction spike and reduce or eliminate the separation bubble, the circular leading edge with a flat was investigated both numerically by using CFD and experimentally by using hydrogen bubble visualization technique in a water tunnel. Definition and criteria for flat design are also discussed. It is found that the double suction spikes on the flat edges are much weaker than the single spike that appears on a circular leading edge. At high incidence, the separation on downstream of the leading edge is weaker in the case with a flat, and the blade performance is improved by comparing it with the case of circular leading edge without a flat. The improvement is similar to or better than that with an elliptical leading edge, but the circular leading edge with a flat has an advantage of being more tolerant with manufacturing inaccuracy thus more acceptable for the practical application than that with elliptic leading edge.

Key words: Compressor blade;Leading edge;Circular leading edge with a flat~+;Numerical simulation