| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: invention is related to gas-turbine plants and is intended for creation of multimode centrifugal compressors with improved gas-dynamic and weight-dimension characteristics. Diffuser comprises two walls axisymmetric to axis of compressor, which form flow path with vaneless section at the inlet, and installed between walls with creation of blade channels and half-vaneless sections at the inlet and outlet, annular grating of vanes with permanent concave-convex aerodynamic profile. Contours of concave and convex sides of separate blade are profiled by setting current angle of separate contour. ^ EFFECT: reduction of full pressure losses in process of braking of subsonic, transonic or supersonic flow in blade channels of diffusers, increased margin of centrifugal compressor stable operation and improved weight-dimension characteristics. ^ 3 dwg |
