适应较大叶型弯角范围的轴流压气机落后角模型

通过对多种落后角模型进行研究对比,选出其中一组,并对设计状态落后角模型重新修正,在此基础上结合S1流场计算发展了一种适用于轴流压气机落后角预测的模型.另对非设计状态落后角计算采用了修正模型.结果表明:建立的计算程序在一定的攻角范围内,对S1流场的预测结果是比较准确的,通过多组平面叶栅验证,在叶型弯角较大或者较小时,设计状态落后角模型预测精度均提高,误差范围控制在1°以内;建立的轴流压气机落后角预测模型,对多组轴流压气机设计状态落后角预测,误差都不超过2°,初步验证了模型的有效性.

Deviation angle models suitable for wider range of blade profile camber in axial-flow compressor

A set of models were selected after studying a series of deviation angle models, and the design deviation angle model was revised. On this basis, a deviation angle model for axial-flow compressor was developed by combining the calculation of S₁ flow field. In addition, an off-design deviation angle model was used. The results show that the program for calculating S₁ flow field is accurate in a certain incidence angle range. Through verification of a series of cascades, the prediction accuracy of the design deviation angle models is improved, and the error is reduced to 1° no matter the blade profile camber is big or small. The prediction model of axial-flow compressor's design deviation angle is applied to a series of axial-flow compressors, and the error is reduced to 2°. This means that the model is effective.