Numerical Calculation Of Aerodynamic Loads Of Helicopter Rotor Using CFD / BET Method

Considering the complexity of analyzing the phenomena affecting the aerodynamic performance of the main rotor helicopter and how to simulate the dynamic movements of the blade relative to the center of rotation, Using methods such as blade element theory together with computational fluid dynamics can be a simpler and less expensive solution than the physical simulation of a helicopter rotor. The geometric characteristics of the rotor of the Bell UH-1 helicopter have been investigated as a virtual disc in two modes of the rotor alone and with the body in static and forward flight conditions. To simulate the flow, unsteady compressible equations with turbulence components are used, and for their discretization, upwind second-order accuracy is used, and the functional effects of the rotor in the form of a spring component are included in these equations.