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SS25

Flow Induced Noise and Structural-Acoustic Coupling 

 

Organiser:  Gopal MATHUR

Organisation/Institution: The Boeing Company, USA

 

Co-Organiser:  Haisam OSMAN

Organisation/Institution: The Boeing Company, USA

 

Organiser:  Naval AGARWAL

Organisation/Institution: The Boeing Company, USA

 

 

Flow induced noise, such as turbulent boundary layer (TBL)  pressure fluctuations, separated flow in the downstream of protrusions, etc. are important sources of noise impinging on the exterior of an aircraft fuselage. Installation of protuberances, such as antenna and large fairings on the exterior surface of aircraft to accommodate communication and defensive needs is a common occurrence in today’s world. These pressure fluctuations excite the aircraft structure which in turn radiates noise inside the passenger cabin. High acoustic loads generated by these protuberances can also give rise to the risk of fatigue and structural failure. Flow induced noise in pipes also of significant concern to many engineering disciplines. Aero-acoustic modeling of such pressure fields is an ongoing topic of research and requires significant effort and attention to details. This is a major contributor to cabin noise in many commercial aircraft. Coupling and transmission of aero-acoustic noise through a structure is also a complex  phenomena.  An understanding of noise transmission mechanism from exterior sources  is important in the design of noise control treatments for many aerospace flight vehicles.