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为了评估弯曲进气道中显著的旋流畸变对压气机性能和稳定性的影响,利用CFD技术开展了Stage 35在对涡旋流畸变下的数值仿真,获得了对涡旋流畸变下的压气机特性线和流场分布,并与无畸变和正负整体涡时的情形进行了对比分析。结果表明:对涡旋流畸变会使压气机的性能和稳定裕度降低,且工作点处于同等强度的正负整体涡旋流畸变工作点之间,在90%换算转速和对涡旋流模式P2下,压气机换算流量、压比、温比、效率和稳定裕度的最大降幅分别为8.00%,7.24%,0.98%,9.64%和43.14%。这种影响主要取决于占主导的旋流畸变类型和不同类型旋流畸变对压气机性能参数影响程度的共同作用。同时压气机换算转速和旋流强度越大,压气机性能参数和稳定裕度下降越多。
In order to evaluate the influence of the significant cyclonic distortion in the curved inlet on the performance and stability of the compressor, the CFD technique was used to carry out the numerical simulation of Stage 35 under the vortex flow distortion. Characteristic line and flow field distribution, and compared with the case without distortion and the positive and negative overall vortex. The results show that the performance of the compressor and the stability margin are reduced for the vortex flow distortion, and the working point is between the positive and the negative integral vortex flow distortion operating points of the same strength. At the 90% conversion speed and the vortex flow mode At P2, the maximum reductions of compressor flow rate, pressure ratio, temperature ratio, efficiency and stability margin were 8.00%, 7.24%, 0.98%, 9.64% and 43.14%, respectively. This effect depends mainly on the dominant swirl distortion type and the effect of different types of swirl distortion on the performance parameters of the compressor. At the same time, the larger the compressor rotating speed and the swirling intensity, the more the compressor performance parameters and stability margin decline.