Application of PSE method into aft-load cascade boundary stability analysis and transition prediction

The stability and transition of aft-load blade was analyzed and predicted by combining numerical calculation and experimental measurement.Parabolized stability equation(PSE) of 3D disturbance wave was deducted under orthogonal curvilinear coordinates.The static pressure distribution on blade surface was measured in wind tunnel test,and this result was used for analysis of blade's flow stability.The results show that:(1) aft-load blade can delay efficiently the transition and enhance the variable incidence of blade;(2) the positive incidence is most unsteady and negative incidence is most steady in the event of significant change of flow characteristics of blade tip.