DOI: 10.1615/TSFP2
ADVANCED TURBULENCE MODELLING OF THE FLOW IN A GENERIC WING-BODY JUNCTION
SINOPSIS
The predictive performance of several turbulence models, among them formulations based on nonlinear stress-strain relationships and on stress-transport equations, is examined for a spanwise-symmetric 3D flow around a generic wing-body junction, consisting of a modified form of a NACA 0020 aerofoil mounted on a flat plate. The dominant flow feature is a pronounced horseshoe vortex evolving in the junction region following separation and recirculation ahead of the aerofoil's leading edge. This case is one of 6 forming a broad collaborative university-industry programme of turbulence-model investigation. In total, 12 turbulence models have been studied, of which 4 representative forms are considered in this paper. Model performance is judged on the basis of solutions for the velocity and Reynolds-stress fields in the vortical flow upstream of the wing nose and across a downstream cross-flow plane. The emphasis of the study is on the structure of the horseshoe vortex and its effects on the forward flow. The main finding of the study is that, for this particular 3D flow, second-moment closure offers clear predictive advantages over the other models examined.