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Aeroacoustic Assessment of Conceptual Low-Noise High-Lift Wing Configurations

Huadong Yao (Institutionen för tillämpad mekanik, Strömningslära) ; Lars-Erik Eriksson (Institutionen för tillämpad mekanik, Strömningslära) ; Lars Davidson (Institutionen för tillämpad mekanik, Strömningslära) ; Shia-Hui Peng (Institutionen för tillämpad mekanik, Strömningslära)
50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition (2012)
[Konferensbidrag, refereegranskat]

Aeroacoustics performance is assessed for three conceptual low-noise and high-lift wings using the surface integral methods of acoustic analogy, including the Kirchhoff method, the Ffowcs Williams and Hawkings method and the Curle method. A new way is proposed to define the integral surface that encloses the core flow region for the first two methods on the basis of the vorticity magnitudes. Both of the first two methods are used to compute the noise generated by the core region of the flow, which is responsible for most of the noise generation. The results obtained by the FWH method support those given by the Kirchhoff method. The Curle analogy approach is adopted to calculate the noise by the boundary layer flow attached on the walls inside the core flow region. Through comparison of the results of the three approaches, the levels of the contribution to the noise by the volume flow and the boundary layers are studied for the configurations. Finally, the mechanism of efficiency on the noise reduction is presented for the three configurations.



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Denna post skapades 2012-01-16. Senast ändrad 2013-09-03.
CPL Pubid: 153071

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära

Ämnesområden

Transport
Strömningsmekanik

Chalmers infrastruktur