Modal decomposition for the analysis of the rotor-stator interactions in multistage compressors |
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| Authors: | N Courtiade X Ottavy N Gourdain |
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| Affiliation: | N.Courtiade1,X.Ottavy1,and N.Gourdain 2 1.Laboratoire de Mécanique des Fluides et d’Acoustique,Ecole Centrale de Lyon,69130 Ecully,France 2.CERFACS,CFD Team,31057 Toulouse,France |
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| Abstract: | A modal analysis method of the rotor-stator interactions in multistage compressors has been developed by LMFA.This method,based on a double modal decomposition of the flow over space and time,has been applied to nu-merical and experimental results of the high-speed 3?-stage compressor CREATE based at LMFA,Lyon-France.It reveals the presence of a very strong rotor-stator interaction which completely drives the flow at casing behind all the rotors.This modal analysis method applied to an unsteady RANS simulation permits to calculate the en-ergy of the rotor-stator interactions and to plot energetic meridian maps to explain experimental results and to analyze the interaction in the whole machine. |
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| Keywords: | rotor-stator interactions modal analysis multistage compressors numerical and experimental results |
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