CAA analysis of a wing section with flap side-edges based on hybrid RANS-LES computation
Paper i proceeding, 2015

© 2015, American Institute of Aeronautics and Astronautics Inc, AIAA. All Rights Reserved. Based on hybrid RANS-LES computation of the turbulent flow around a double-flapped wing section, CAA (Computational Aero-Acoustics) analysis was conducted using the Curle, the Kirchhoff and the FW-H acoustic analogy methods. The focus was placed on the flow-induced noise due to the flap side-edges (FSE). It was shown that the FSE has triggered extensive unsteady vortex motions and being the most potent noise-generating source with significant pressure fluctuations on the side-edge surface. In the CAA analysis, two integral surfaces, defined by the iso-surface of vorticity magnitude, were verified when using the Kirchhoff and the FW-H methods. The Kirchhoff method is more sensitive to the location of the integral surface. The analysis using the Curle method indicates that the pressure fluctuations on the surface of the main wing and the first flap have made similar contributions to the far-field noise level, while the second flap contributes slightly less. The Kirchhoff and FW-H methods have predicted overall higher noise levels comparing to the Curle method. In the comparison, the result obtained with a stochastic method based on a RANS solution was also involved. The result has clearly demonstrated that, to capture the most potential noise generation in the presence of flap side edges, turbulence-resolving simulations should be incorporated in hybrid CFD/CAA analysis.

Författare

Peng Shia-Hui

Chalmers, Tillämpad mekanik, Strömningslära

Lars Tysell

Totalförsvarets forskningsinstitut (FOI)

Huadong Yao

Chalmers, Tillämpad mekanik, Strömningslära

Lars Davidson

Chalmers, Tillämpad mekanik, Strömningslära

Svensk Vindkraftstekniskt Centrum (SWPTC)

Lars-Erik Eriksson

Chalmers, Tillämpad mekanik, Strömningslära

21st AIAA/CEAS Aeroacoustics Conference, AIAA Aviation

AIAA 2015-2839

Ämneskategorier

Maskinteknik

Strömningsmekanik och akustik

Styrkeområden

Transport

Fundament

Grundläggande vetenskaper

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

Drivkrafter

Innovation och entreprenörskap

DOI

10.2514/6.2015-2839

ISBN

9781624103674

Mer information

Senast uppdaterat

2018-03-19