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Simulation of Wing-Body Junction Flows with Hybrid RANS/LES Methods

DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf.830
pages 415-418

Song Fu
Department of Engineering Mechanics, School of Aerospace Engineering, Tsinghua University, Beijing, 100084, China

Zhixiang Xiao
School of Aerospace Engineering, Tsinghua University, Yifu building, Tsinghua University, 100084 Beijing, China

Haixin Chen
School of Aerospace Engineering, Tsinghua University, Beijing, 100084, China

Yufei Zhang
School of Aerospace Engineering, Tsinghua University, Beijing, 100084, China

Jingbo Huang
School of Aerospace Engineering, Tsinghua University, Beijing, 100084, China

Abstract

In this paper, flows past two wing-body junctions, the Rood and NASA TN D-712, are studied with two hybrid Reynolds-Averaged Navier-Stokes (RANS) and Large-Eddy Simulation (LES) methods. One is Detached-Eddy Simulation (DES) and the other is Delayed-DES where both are based on a weakly nonlinear two-equation k-ω model. Whereas the RANS method can accurately predict the flow structures, it performs poorly on the turbulent kinetic and shear stress compared with available experimental data. DES, through its hybrid strategy of introducing a length scale, predicts flow separation, a vortex or the starting point of vortex breakdown too far upwind. DDES, with its delayed effect, shows a great improvement in flow structures and details and satisfactory agreement with measurements.

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