Optimum Shape Design of Helicopter Rotors in Forward Flight via Control Theory

摘要

This paper presents an adjoint-based automatic aerodynamic optimization for helicopter rotors in forward flight. The procedure to be used can be broken down into four phases: first, implement tho Spalart-Allmaras one equation turbulence model into the existing nonlinear frequency domain (NLFD) framework; second, investigate the NLFD timestep and develop an accurate numerical model for the MBB BO-105 helicopter rotor aerofoil; third generate an innovative multi-objective cost function that ultimately maximizes the blade's lift over drag ratio; and finally, demonstrate the approach for the redesign of a NACA 23013 helicopter blade section.