Aerodynamic noise generation due to the scattering of jet instability waves

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• Dr Benshuai Lyu, DAMTP
• Friday 14 February 2020, 13:00-14:00
• LR5, CUED..

If you have a question about this talk, please contact Connor O'Pray.

Jet noise, at the very heart of aeroacoustics, has been the dominant component of aircraft noise for decades. The reduction of jet noise has been heavily relying on increasing the bypass ratio of aero-engines. The increase of the bypass ratio, and hence the engine diameter, have led to a close coupling between the engine and the aircraft wings.

This close coupling however creates a new problem: jet noise is enhanced significantly at low frequencies by the wing. This modified jet noise is commonly referred to as installed jet noise. In this talk, I will summarize some of the recent work that I have done during my PhD at CUED . This includes a low-order model of the installed jet noise, some experimental studies, and if it time allows, some noise reduction strategies. More importantly, the newly discovered physical mechanism for such a noise intensification will be highlighted.

This talk is part of the Fluids Group Seminar (CUED) series.

This talk is included in these lists:

• Acoustics Lab Seminars
• Engineering Department Acoustics/Combustion Student seminars
• Fluids Group Seminar (CUED)
• LR5, CUED.

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