STATIONARY BLADE CASCADE OF AXIAL COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide a stationary blade cascade of an axial compressor capable of minimizing a wave drag caused by an impact wave produced in a transonic range.;SOLUTION: This stationary blade of an axial compressor comprises a front surface generating a positive pressure and a rear surface generating a negative pressure. Both the front and rear surfaces are present on one side of a chord line. When a boundary layer on the front surface side of a stationary blade cascade is made unstable at a portion a where a distance between the front surface and the rear surface becomes a peak value so as to separate the layer positively, an impact wave on the rear surface side opposed to the unstable boundary layer is suppressed from occurring so as to suppress a wave drag from occurring. In addition, because the distance between the front surface and the rear surface of the stationary blade cascade lowers after reaching the peak value, a flow is restricted at a minimum value portion a' to re- accelerate the flow, the boundary layer can be stabilized so as to suppress the promotion of separation in order to suppress an increase in frictional resistance due to separation of boundary layer on the front surface side.;COPYRIGHT: (C)2001,JPO