Numerical Simulation of a Complete Helicopter Configuration in Forward Flight Using Fluid-Structure Coupling

Abstract

This paper highlights the results obtained by coupling the aeromechanic tool HOST with the DLR CFD solver FLOWer within the framework of the EU-Project GOAHEAD. The process was applied to predict the flow around the GOAHEAD configuration in forward flight at Mach number of 0.204 and fuselage pitch angle of-2.5 o. Comparisons of the CFD results with experimental measurements revealed very good agreement for main rotor pressure and the front part of the fuselage. Main rotor power could be predicted with an accuracy of 0.25%.

Coupled flight dynamics and CFD – demonstration for helicopters in shipborne environment

“…Various flight conditions were simulated using a scaled model of a helicopter resembling the NH90, with a four-bladed main rotor and a two-bladed tail rotor. This case has since been used to validate numerous CFD codes (2)(3)(4) .…”