5 August 2024
The paper was called “Swirling Flow Effects on the Aeroacoustic Signature of an Aerospike Nozzle”. It looks into the effect of different swirl numbers on the cold, supersonic aerospike nozzle jet and the resulting aeroacoustic behaviour. It is found that higher swirl numbers suppress the screeching component and reduce the influence of the mixing noise. On the other hand, tonal components linked to the main azimuthal mode and its higher harmonics are enhance due to the swirling boundary conditions.