Supersonic jets, particularly shock-containing jets, often exhibit high-intensity, discrete-
frequency acoustic tones. These tones are the signature of an aeroacoustic resonance loop …

Turbofan engines are one of the most popular propulsion systems used in commercial
aircraft due to their high thrust and good fuel efficiency. To reduce noise generated from …

'Chevrons', a sawtooth pattern on the trailing edge of exhaust nozzles, are being
implemented on modern jet engines. The technology reduces jet noise for 'separate …

Elliptic nozzle geometry is attractive for mixing enhancement of supersonic jets. However, jet
dynamics, such as flapping, gives rise to high-intensity tonal sound. We experimentally …

This work details an experimental investigation aimed at reducing the noise output of
piezoelectrical-driven synthetic jet actuators while minimising peak jet velocity reduction …

A detailed investigation of the statistical properties of the near-field pressure fluctuations
induced by an under-expanded jet, by varying the nozzle exit shapes has been presented …

We present the experimental investigation conducted to study the mixing characteristics of a
Mach 1.5 jet manipulation using steady fluidic injection. Two important parameters are …

Imperfectly expanded jet flows are known to have additional noise sources known as
Screech and broadband shock-associated noise. They are generated by the interaction …

Jet noise remains a key target for aircraft noise reduction in the foreseeable future. While
being extremely challenging, the requirement of predicting both low and high frequency …

View Video Presentation: https://doi. org/10.2514/6.2021-2181. vid Additional noise sources
known as Screech and BBSAN are common in jet noise for imperfectly expanded jet flow …