Abstract: This paper investigates the feasibility of applying a feedforward active control strategy for reducing gust/cascade interaction noise via an inversion technique. The basic scenario is to cancel the interaction noise through theintroduction of secondary sources distributing on cascade surfaces. The intensity of the secondary sources is obtainedbased on an aeroacoustic inversion model. Numerical study reveals the feasibility of embedding dipole secondarysources on cascade surfaces. In addition, the optimal distribution is also investigated for alleviating the sacrifice ofaerodynamic performance.

Key words: gust/cascade interaction, feedforward, active control, inverse problem, secondary source