跨声离心压气机叶轮CAD程序

A CAD COMPUTER SYSTEM FOR CENTRIFUGAL COMPRESSOR IMPELLER WITH TRANSONIC INFLOW

离心压气机因其结构简单,级压比高而被广泛地应用于小型燃气轮机和内燃机增压装置。为了提高效率和减轻重量希望能提高压气机的压比。这样势必会升高叶轮进口马赫数,使内部流场出现超声区和激波。

A computer-aided design (CAD) system has been developed for high pressure ratio centrifugal compressor impellers with transonic inflow, based on the original one suitable only for subsonic inflow. The geometry is created by analytical functions. The Quasi-3D calculation is consisted of the S2 and S1 transonic flow solutions. Different boundary layer calculation methods are involved to take care of shock-boundary layer iterations. The comparisons between calculated and measured results taken within the impeller of a high pressure ratio cetrifugai copres-sor in a fairely good agrement.