PSP and PIV investigations on the VFE-2 configuration in sub- and transonic flow

Numerical simulation of the peculiar subsonic flow-field about the VFE-2 delta wing with rounded leading edge

“…The surface pressure contours of the numerical solution for Re = 3 Mio are very similar to the corresponding surface pressure contours of the DLR PSP experiments [15], as it is shown in Fig. 8.…”

“…Fig. 8 shows the comparison of the surface pressure contours from the numerical solution and from the DLR PSP experiment [15]. Obviously the separation point of the primary vortex is very close to the experimental separation point for this test case.…”

“…Three different leading edge configurations were chosen: a sharp leading edge and three rounded leading edges of varying radii [2]. Because of the analytical geometry definition and because of its general availability it was also chosen as test case for the new experimental investigations [12,15,17,9,3]. Fig.…”

Validation of OpenFOAM numerical methods and turbulence models for incompressible bluff body flows

“…This capability is not used in this study, as flow unsteadiness leading to resolved turbulence generation was induced by the geometry. Note that some zonal hybrid RANS/LES studies, such as [44], have also applied a turbulence trigger at the RANS-LES interface to enhance resolved turbulence in the LES region.…”

Helium-filled soap bubbles for vortex core velocimetry

“…Moreover, being non-intrusive (Raffel et al 2007;Westerweel et al 2013) PIV is well suited for the study of vortices emanating from rotating blades. Most PIV experiments conducted on vortices employed the planar approach based on the stereoscopic configuration (Konrath et al 2013;Furman and Breitsamter 2013). One of the underlying hypotheses of particle image velocimetry is that the tracer particles can be assumed to move at the same velocity as the surrounding fluid.…”