进气畸变度及分布形式对跨音速轴流压气机工作特性的影响

Research on the Influence of Intake Distortion Degree and Distribution Form on the Working Characteristics of Transonic Axial Compressor

为了研究进气畸变对压气机的工作特性以及稳定性的影响,以NASA Stage35型跨音速轴流压气机为研究对象,采用全通道计算模型对不同畸变程度和不同畸变分布形式条件下压气机的工作特性及内部流场变化规律进行数值模拟研究。结果表明:随着进气畸变度的不断增加,压气机的峰值效率逐渐下降,由畸变所引起的总压损失在压气机内部流道中逐渐扩大;在保持畸变度和畸变区域总面积不变的条件下,畸变区的分散程度对压气机在峰值效率点附近的工作特性影响较小,但随着畸变分布区分散程度的逐渐增加,压气机的稳定裕度有所提高,压气机内部流道中的总压损失和熵增也有所降低。

In order to research on the influence of the air intake distortion on the operating characteristic and stability of the compressor.The NASA Stage35 transonic axial flow compressor is used as the research object, and the full passage geometric model is used to numerically simulate the working characteristics and internal flow field change rule of the compressor under various distortion degrees and distortion distribution forms.The research results show that as the intake distortion degree increases, the peak efficiency of the compressor gradually decreases, and the range of total pressure loss caused by the distortion gradually expands in the internal flow passage of the compressor.While the distortion degree and total distortion area remain unchanged, the degree of dispersion of the distortion area has little effect on the operating characteristics of the compressor near the peak efficiency point.As the degree of dispersion of the distortion distribution area gradually increases, the stability margin of the compressor increases significantly, and the total pressure loss and entropy increase in the internal flow passage of the compressor are also reduced.