Performance of a Highly-Loaded HP Compressor

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Abstract
A 4-stage axial research compressor, which is representative of the rearmost stages of a highly-loaded military or civil compression system, has been designed and tested at RAE Pyestock. The compressor is of large scale, with extended inter-row gaps, to facilitate the acquisition of detailed aerodynamic data. The unit performed well on test, exceeding its design pressure ratio of 4.0, and achieving a peak polytropic efficiency at design speed of 89%. Flow profiles obtained from area traversing at stator exits are presented and discussed. The measured performance is compared with an S1-S2 calculation incorporating an inviscid-viscous blade-to-blade method.
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