EULER CALCULATIONS OF MULTIBLADED ROTORS IN HOVER BY DLR AND ONERA METHODS AND COMPARISON WITH HELISHAPE TESTS

Within the European project HELISHAPE, the Euler methods for the calcu lation of multibladed rotors in hovering flight, developed respectivel y by DLR and ONERA, have been compared and assessed. No prescribed wak e model is used by both methods. In this work, the computations were p erformed on common single-block structured grids for two realistic fou r-bladed rotors of aspect ratio equal to 15, The numerical results - o btained before the experimental data were available - compare fairly w ell with the experiment. Special attention is paid to the capture of t he wake and the evolution of the tip vortex.