Flow Perturbations Control of Compressor under Inlet Flow Distortion using Unsteady Jet Injection

This paper investigates the control of flow perturbations in a compressor under inlet flow distortion utilizing unsteady jet injection. The study focuses on the impact of inlet flow distortion on compressor stability and the variations in stability under unsteady jet injection control. A multidimensional compressor system model and a jet injection device model are established, and an algorithm for unsteady jet injection control is designed, considering the perturbations model of inlet flow distortion. Numerical simulations are conducted to analyze the dynamic response of the compressor system under inlet flow distortion perturbations of various amplitudes and frequencies. The results demonstrate that unsteady jet injection effectively suppresses flow perturbations caused by inlet flow distortion, enabling stability control of the compressor’s inlet flow perturbations. And the sensitivity of the unsteady jet injection control is dependent on the frequency rather than the amplitude of the flow perturbations. Additionally, the effectiveness of unsteady jet injection in suppressing inlet flow distortion decreases with an increase in flow perturbations frequency.