Investigation Of Compressor Stability With Distortion By Inlet Insert-board

To study the aircraft-engine stability assessing technology about total-press distortion, four different structure insert-boards and testing schemes are designed, based on the technology of Russian insert-board distortion and assessing compressor stability of English and USA. The low speed compressor (LSC) at College of Energy and Power in NUAA is used to carry out the all insert-board distortion experiments studies. Use commercial software NUMECA to calculate the flow-field of the inlet of the LSC with an insert-board, and analyze the flow-field. Also a PIV (Particle Image Velocimetry) flow-field testing scheme is designed, but have not been carried out for some reasons, for reference only.The collection of illustrative plates of air interface plane (AIP), steady index, unsteady index, synthesized index and the loss of the stability margin are given out, and get some valuable results are summarized by analyzing the data. The results of the experiment show that the synthesized index, unsteady index and steady index inflect the stability margin of the compressor well. And show that the insert-board experiment can get the enough weight in the synthesized index. And also show that the low-press-area of the steady total-press moves along the rotor circumvolving direction. And so on.