Flow Pattern Analysis on a Delta Wing at Transonic Speed

The present work aims to provide an advancement in the prediction of delta wing flow for the understanding of the several flow physics phenomena that occur over the wing particularly at the transonic speed condition. Simulations of vortex-dominated flow around the sharp leading-edge VFE-2 wing have been performed. The SA-based IDDES model is applied in the scale-resolving computations. The sensitivity of the results to temporal and spatial resolution has been addressed and commented upon. The hybrid method results reveal physical aspects which have neither been seen from URANS with sufficient accuracy nor are available from experimental data. The complex leading-edge vortex pattern, the shock wave locations and subsequently the vortex-shock interaction have been investigated. Finally, also the impact of grey-area effects in the IDDES field has been assessed.