Recent Advancements of Comprehensive Code Applications to HART II Test Cases

Kurzfassung

In this paper DLR’s high resolution comprehensive rotor code S4 together with its prescribed wake as well as DLR acoustic code APSIM will be used to simulate the aerodynamic loading (low frequency and BVI-induced loading), blade motion,w ake system (tip vortex helix and trajectory), acoustic radiation of a Bo105 model rotor that has been used within the HART II test. The test cases used for code validation are the baseline case without active control (which represents a 6deg descent flight with strong BVI noise radiation) and two cases with 3/rev HHC applied to the blade root with different control phase such as to minimize noise and vibration.