论文部分内容阅读
为研究进气畸变对多级轴流压气机性能以及稳定性的影响,基于彻体力模型理论建立了一个模拟多级轴流压气机进气畸变的三维分析模型CSAC,并采用实验与CFD相结合的方法进行了验证。利用CSAC模型模拟了周向总压畸变对四级低速轴流压气机性能的影响。结果表明:均匀进气下CSAC与CFD计算特性最大误差不超过1.5%;进口总压畸变传递到第三级时畸变度衰减为0;在低压区的转子出口存在一个高总温畸变区,其强度在向下游传递中逐渐增强,到达第四级时总温最大升高0.4%;高总温影响区域在向下游发展中沿叶片转动方向逐渐扩张,造成压气机性能损失加大,最大总压比下降0.7%。所有结果均显示出CSAC模型是当前分析畸变对压气机性能影响的有力工具。
In order to study the influence of intake distortions on the performance and stability of multi-stage axial-flow compressor, a three-dimensional analysis model CSAC, which simulates multi-stage axial-flow compressor intake distortions, is established based on the theory of peristaltic model. Combining experiments with CFD The method has been verified. The effect of circumferential total pressure distortion on the performance of four-stage low-speed axial-flow compressor was simulated by CSAC model. The results show that the maximum error of calculated characteristic of CSAC and CFD under uniform gas inlet does not exceed 1.5%, and the distortion of the total pressure from the inlet to the third stage decays to zero. There is a high total temperature distortion zone at the rotor outlet in the low pressure zone The intensity reached the fourth level when the temperature reached a maximum of 0.4%. The region with high total temperature gradually expanded along the blade in the downstream development, resulting in the loss of performance of the compressor increased, the maximum total pressure A decrease of 0.7%. All of the results show that the CSAC model is a powerful tool for the current analysis of the effects of distortion on compressor performance.