ABSTRACT
Numerical analysis and visualization of a three dimensional coherent structures of vortex flow over a delta wing configuration are difficult tasks for the CFD techniques. Fully structured grids on full span delta wing (with and without string fairing) were generated with grid refined near the wall to capture the physics of vortex flow in both span and stream wise directions. The strength of the vortex was found to be increasing downstream from the apex of wing. SA, SA (modified) and Standard k-ε turbulence models have under-predicted the onset of flow separation and amount of flow separation. The primary vortex suction peak is situated conically on the wing and diminishes in magnitude as the trailing edge is approached. The strength of the vortex was found to be increasing downstream from the apex of wing. Based on the comparison of computed surface pressure plots with that of experimental data and visualization of different contours, Shear stress turbulence model is recommended for better prediction of separated flow over a delta wing configuration. Moreover, it was found that the string fairing also plays a dominant role in overall aerodynamic performance of delta wing.
