Centrifugal compressors are widely used in many industrial fields such as automotive, aviation, aerospace. However, these turbomachines suffer instability phenomenon when the flow rate is too high or low, called rotating stall and surge. These phenomena cause operation failure, pressure fluctuations vibrations of thorough system. Numerous mechanical solutions have been presented to minimize ins...

This paper proposes a control system for integrated pressure and surge control of centrifugal compressors for enhanced oil recovery application. The proposed control system is based on linear model predictive control. A fully validated non-linear dynamic model was developed in order to simulate the operation of the compressor at full and partial load. The model of the compression system include...

The effect of inertia terms ( especially centrifugal terms ) on the leakage flow through the narrow clearance between the rotor and side plates of a sliding vane rotary compressor is investigated, and it is pointed out that the flow model without inertia terms can be sufficiently accurate in our situation. Then, our problem is solved by Finite Element Method under the non-axisymmetric boundary ...

The application of oil-free-integrated motor-compressors has become increasingly popular in recent years. One of the significant features of this class of machinery is compactness, providing space-savings compared to traditional-oil-lubricated compressors with associated gearboxes and lubrication systems. The integration of a turbo separator with such a compressor has resulted in the creation o...

Synchronous Thermal Instability Evaluation of Medium Speed Turbocharger Rotor-Bearing Systems Brian R. Carroll Rotors in fluid-film bearing supported turbomachinery are known to develop elliptical orbits as a result of rotor-bearing interactions, mass unbalance within the rotor, gravitational bending of the shaft and external excitation. In synchronous whirl, where the speed at which the shaft ...