Numerical simulation of Hovering S-76 Helicopter Rotor including Far-Field Analysis

摘要

The paper presents the numerical prediction by the ONERA software elsA of the aerodynamic performance of the S-76 rotor in hover. The rotor loads are compared to experimental data for different collective pitch angles showing an overall good agreement. The investigations focus on the influence of the tip Mach number as well as the tip planform (straight or swept). The influence of taking into account the laminar-turbulent transition by the transport equation model of Menter-Langtry is presented. All numerical results are post-processed with the far-field approach recently extended to rotating frame. The physical decomposition of the torque obtained with this method provides additional information that enriches the numerical simulation analysis.