The principal idea in applying this methodology to compressor surge
is that the pressure signal consists of turbulent pressure fluctuations and signal noise at stable compressor operation, while it is more wave-like near surge, with a frequency corresponding to the eigenfrequency of the compression system, Eq.
It can be seen from Figure 8 that the compressor surge
margin that has been optimized seems more gentle compared to the original surge margin.
 Wang C., Shao C., and Han Y., Centrifugal Compressor Surge
Control Using Nonlinear Model Predictive Control Based on LS-SVM", IEEE Transaction on Control Systems.
Compression systems are designed and operated to eliminate or minimize the potential for compressor surge
, a dynamic instability detrimental to the integrity of the unit.
Ingestion of this ash ablates jet engine blades and vanes and the ash can melt to a molten glassy state, causing blockages which can lead to compressor surge
and possible flameout.
Eliminating compressor surge
results in tremendous compressor energy savings and operational benefits such as:
I can guess, though: violent compressor surge
, catastrophic blade failure, severe vibration, primary structure failure, impact into terrain.
Centrifugal compressor operation is limited by the flow choking at high mass flows, and by compressor surge
at low mass flows.
Centrifugal compressor surge
and its prevention have drawn significant attention in compressor literature and editorial content.
is sometimes viewed as a common occurrence but design of a proper surge control system should be regarded as both a necessary design practice and an effective risk-mitigation measure.
The retrofit included improving the reliability of the gas turbine fuel control systems, upgrading the compressor surge
control systems, and adding instrumentation to the stations and the turbines to allow for more precise monitoring.
[10.] Patent "Prevention of Parameter Excursions During Process Compressor Surge
in Gas Turbines." #5,879,133; Issued March 9, 1999.