This paper presents a computational study that was conducted to investigate the impact of
active-camber actuation on an isolated full-scale Bo 105 rotor for noise, power consumption
and (non-rotating) hub vibration. The study was carried out at advance ratios -=0.05–0.35 using CAMRAD II based comprehensive analysis for the rotor aeromechanics. Acoustic analysis
was carried out using the Ffowcs Williams–Hawkings equation formulation for elastic blades
using PSU-WOPWOP. To automate the generation of compliant data files and the subsequent
analysis, an open-source post-processing framework was created. The active-camber actuation scheduling and amplitude were varied at each advance ratio and significant effects on
rotor acoustics, rotor power, and induced hub vibration were obtained. Using 1P (once-perrevolution) and 2P active-camber actuation, it is shown that low advance ratios -=0.05–0.15
were more amenable to simultaneous reduction of power and hub vibration. For advance
ratios of -=0.10 and 0.15, simultaneous reduction of rotor noise, power, and hub vibration was
obtained. Based on the results of a separate larger parametric study at advance ratio -=0.30,
it was found that the same physical effects that led to power reduction also resulted in rotor
noise reduction by up to 15 dB below the rotor plane.
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This paper presents a computational study that was conducted to investigate the impact of
active-camber actuation on an isolated full-scale Bo 105 rotor for noise, power consumption
and (non-rotating) hub vibration. The study was carried out at advance ratios -=0.05–0.35 using CAMRAD II based comprehensive analysis for the rotor aeromechanics. Acoustic analysis
was carried out using the Ffowcs Williams–Hawkings equation formulation for elastic blades
using PSU-WOPWOP. To automate the generat...
»
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