Super-critical steam turbine high pressure stage static blade cascade is as the prototype blade to numerical simulations. The prototype blade has aft-loading and big front-edge radius characteristics. Different swept blades are made by changing the sweep angle and sweep height in order to study the effect of blade sweep on aerodynamic characteristics of super-critical steam turbine high pressure stage blade. The numerical simulation sweep angle are made of fore-angel 10° , 20° , 30 ° and aft-angle 10° ,20° ,30° , sweep height are made of 10%, 20%, 30% blade height. The steam turbine aerodynamics are analyzed such as static pressure coefficient of swept blade profiles, total pressure coefficient of swept blade at blade trailing edge, contour of mass averaged static pressure on meridional surface and velocity streamlines along hub and suction surface by CFD software CFX®. The numerical simulation results indicate the fore-swept blades increase the low energy fluid centralizing in endwall corner and the endwall secondary flow loss, but the loss is decreased at mid-span, comparing to the baseline. But aft-swept blades decrease the low energy fluid centralizing in endwall corner and the endwall secondary flow loss, but the loss is increased at mid-span, comparing to the baseline. Either the fore-sweep height or the aft-sweep angle can increase the above results. At the same time the swept blade aerodynamics also are computed at 10,-10 degree incidence, the results indicate it keep down the aft-loading characteristics of baseline.
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