Active suppression of compressor instabilitiesA strategy is proposed for controlling aerodynamic instabilities which limit the useful range of both axial and centrifugal turbomachines. Both local and global instabilities (incipient rotating stall and surge) are analyzed. A theory is developed which shows how an additional disturbance, driven from real time data measured within the machine, can be generated so as to realize a device with characteristics fundamentally different from those of the turbomachine without control; for the particular compressor analyzed, the control led to a 20 percent increase in the extent of the stable operating range. The use of structural dynamics to enhance stability is also discussed.
Document ID
19860060672
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Epstein, A. H. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Ffowcs Williams, J. E. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Greitzer, E. M. (MIT Cambridge, MA, United States)