A through flow inverse design approach for radial and mixed-flow turbines

Acode of quasi-3D streamline curvature was developed through flow method for the inverse design of radial and mixed-flow turbines.This code was used to design a single stage mixed-flow type turbine which served as the turbine of a micro-turbojet engine with a thrust of 500 N.By computational fluid dynamics examination of the turbine stage and intensity evaluation of the blisk,it is proved that the micro-turbine design has achieved all its design goals.To realize consolidation of design schemes for centripetal-,centrifugal-and mixed-flow turbines,S_2,m streamline curvature equilibrium equation was written along the directions of both the streamline 'm' and the streamline's quasi-normal-line 'q'.Thus this scheme can also be used in the design of axialflow turbine.The through flow design code utilized the 'whole controllable vortex' method in all computation stations.