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通过对压气机环形无叶片通道求解带源项的N-S(Navier-Stokes)方程,实现对压气机全通道流场的计算,建立了压气机三维黏性非定常数值计算模型.源项是由三维计算流体动力学(CFD)求解器定常计算的气流参数计算得到,求得不同工作点源项大小,然后根据进口参数对源项插值得到当前计算点源项.采用该模型对某跨声速单级压气机在均匀进气下性能和流场的计算结果与实验结果进行了对比,两者能够较好的一致,验证了模型的可靠性;之后应用该模型对周向总压畸变进气下的流场和性能进行了计算,分析了畸变进气对压气机三维流场和性能的影响,并引入压气机失稳判据分析畸变对压气机稳定性的影响.
The NS (Navier-Stokes) equation with source is solved by the annular non-vane channel of the compressor to calculate the full-channel flow field of the compressor, and a three-dimensional viscous unsteady numerical model of the compressor is established. The source term is a three- Calculate the airflow parameters of the CFD solver and calculate the size of the source item at different work points, and then interpolate the source term according to the imported parameters to get the current source of the calculated point.Using this model, Compressor performance and flow field at uniform inlet were compared with the experimental results, the two can be better consistent, verify the reliability of the model; after the application of the model of the total circumferential pressure distortion under the intake Flow field and performance of the compressor were analyzed. The effect of distorted intake air on the three-dimensional flow field and performance of the compressor was analyzed, and the compressor failure criterion was introduced to analyze the influence of distortion on the compressor stability.