Nonlinear Control of Rotating Stall using Axisymmetric Bleed with Continuous Air Injection on a Low-Speed, Single Stage, Axial Compressor

Simon Yeung, Caltech, Mechanical Engineering

Active control of rotating stall and surge using bleed valves has been demonstrated on low and high speed compressors using high bandwidth actuators. We provide a method to reduce the bandwidth and rate requirements for control of rotating stall by combining an axisymmetric bleed valve with continuous air injection. The addition of the continuous air injection is modeled as a shift of both the stable and unstable parts of the compressor characteristic and serves to reduce the requirement of a bleed valve used for rotating stall stabilization purpose. The results are demonstrated using a low-speed, single stage, axial flow compressor.