跨音涡轮叶栅计算机辅助设计

 本文介绍了一种跨音涡轮叶片造型、气动设计的计算机辅助设计方法,它是“涡轮叶片一体化CAD系统”的核心环节之一。对应用该方法设计的大负荷斜切口叶背反凹叶型作了叶栅吹风试验,获得了很好的超音叶栅性能,但亚音工况叶栅性能略受影响。

A METHOD FOR COMPUTER AIDED DESIGN OF TRANSONIC TURBINE CASCADE

A computer aided design method for transonic turbine aerofoil shaping and thermodynamic analysis is presented. It adopts the technique of "Computational Geometry"developed by authors for blade space shapingi. An improved Streamline Curvature method for cascade analysis, called CASC, is applied to blade to-blade stream surface analysis. Its advantage over the conventional streamline curvature method lies in using oblique computational stations. On the basis of choosing the throat as a basic computational station, all oblique computational stations are generated from input data by circular spline fitting and interpolating.A high-loaded turbine cascade with anti-convex suction surface near the trailing edge has been designed with success by this method. Its appreciable supersonic performance is testified in wind tunnel. This method is comprised in our 'Turbine Blade Computer Aided Design System （GTCAD） as one of core modules.