Euler Calculations of Multibladed Rotors in Hover by DLR and ONERA Methods and Comparison with Helishape Tests

摘要

Within the European project HELISHAPE, the Euler methods for the calculation of multibladed rotors in hovering flight, de- veloped respectively by DLR and ONERA, have been compared and assessed. No prescribed wake model is used by both meth- ods. In this work, the computations were performed on common single-block structured grids for tow realistic four-bladed ro- tors of aspect ratio equal to 15. The numerical results__ obtained before the experimental data were available__ compare fairly well with the experiment. Special attention is paid to the capture of the wake and the evolution of tip vortex.