关键词: 落后角模型;跨声速轴流压气机;大弯角平面叶栅;特性计算;HARIKA算法

Abstract: In order to develop a more accurate and fast program for characteristic calculation of present multi-stage transonic axial-flow compressors， a suitable reference incidence angle model was selected， and a design/off-design point deviation angle model suitable for large-camber， double-arc blade profile was established. Thereafter， the experimental data of a large camber plane cascade under multiple working conditions were used to verify the newly established deviation angle model， and the incidence angle model and deviation angle model were embedded in the HARIKA algorithm to realize the replacement of original model in the HARIKA algorithm. In addition， the newly established HARIKA algorithm and the three-dimensional numerical calculation software NUMECA were used to calculate the characteristics of a two-stage transonic axial compressor at design / off-design speeds. Finally， the results show that the values calculated by the deviation angle model established in this paper are in good agreement with the experimental values for the deviation angle of the airflow at cascade outlet， with an average error of 0.42°， which is small. The characteristic prediction results of the new HARIKA algorithm for the compressor are closer to the experimental values ??than the three-dimensional numerical calculation results. The maximum prediction error of the pressure ratio is 2.54%， the maximum prediction error of the efficiency is 3.68%， and the overall prediction error is small. Based on these results， it can be seen clearly that the off-design point deviation angle model established in this paper has certain accuracy and applicability， and the improved HARIKA algorithm has certain engineering practicability in characteristic prediction of multi-stage transonic axial-flow compressors.

Key words: Deviation angle model;Transonic axial compressor;Large camber plane cascade;Characteristic calculation;HARIKA algorithm