Abstract
Axial compressors tend to experience significantly increased losses during off-design operation and are prone to flow separation under high aerodynamic loads. Active flow control (AFC) presents a way to counteract this by means of local injection or aspiration, in order to obtain more favourable momentum distributions. It is a strength of active injection methods that the injection rates may be adapted during compressor operation, in order to maximise the benefit at different operating points. This paper investigates the potential of varying the mass-flow rate of a suction-side stator injection, in order to improve the off-design performance.
