Published in Report: Understanding and Modeling Vortical Flows to Improve the Technology Readiness Level for Military Aircraft, October 1, 2009, pages 1-32.
NOTE: At the time of publication, the author Russell M. Cummings was on sabbatical leave from Cal Poly.
The numerical simulation of the flow for the VFE-2 configuration with rounded leading edges is presented. For the numerical simulation the Cobalt Code was used, which uses a cell-centered unstructured hybrid mesh approach. Several numerical results are presented for the steady RANS equations as well as for DES and DDES hybrid approaches. Within this paper the focus is related to the dual primary vortex flow topology, especially the sensitivity of the flow to angle of attack and Reynolds number effects. Reasonable results are obtained with both steady RANS and SA-DDES simulations. The results are compared and verified by experimental data, including surface pressure and pressure sensitive paint results. The impact of transition on the resulting flow field is also assessed, and recommendations for improving future simulations are made
The definitive version is available at http://www.rta.nato.int/Pubs/RDP.asp?RDP=RTO-TR-AVT-113.