离心压气机叶轮流场的S_1／S_2准三元解的分析

对Ｓ_１，Ｓ_２程序作了重要改进后，完成了离心压气机的Ｓ_１／Ｓ_２准三元迭代计算，并增加了前后处理和迭代过程中各环节的自动连接，形成了一个功能比较齐全的离心压气机准三元正问题分析的工程实用软件系统

QUASI-3D SOLUTION FOR THE IMPELLER FLOW-FIELD

Based on the improvement of S1 and S2 codes, a quasi-3D solution for the impeller flow-field has been completed in present study. The quasi-3D solution is obtained by use of iteration between a number of S1 stream filaments and a single mean S2 stream filament. The computation results for a given impeller show that the convergence solution can be obtained merely through five or six iteration cycles. And the accuracy of iteration convergence is quite high. The accuracy of Mach num and S2 is automatically ber can reach 3% in a given computation example. The process of iteration between S1 carried out and no artificial interference is required. The prepro cess and post-process are sophisticated in present software system. Using ready-made dr awing-software, the computation results can be transformed into figures or pictures on computer screen or plotter directly. The present software system has been successfully applied to engineering design of centrifugal compressor.