Unified Approach for Potential and Viscous Free-Wake Analysis of Helicopter Rotors

摘要

A unified formulation for the potential and viscous free-wake analysis of helicopter rotors in incompressible, inviscid and viscous flows is presented. The wake is treated as a vortex layer, with zero thickness for potential flows and finite thickness for viscous flows. The numerical algorithm for the discretization is outlined. Numerical results are in good agreement with the numerical results of Rao and Schatzle and the experimental ones of Landgrebe and of Shivananda. Reprints. (FR)