Prediction of Rotor Hub Flow Using Mercury Framework

In this paper, interactional aerodynamics between rotor hubs and a horizontal stabilizer are predicted using a multimesh paradigm, heterogeneous CPU-GPU framework, Mercury. Mercury framework incorporates three flow solvers at the University of Maryland, 1) OverTURNS, a structured solver on CPUs, 2) HAMSTR, a line based unstructured solver on CPUs, and 3) GARFIELD, a structured solver on GPUs, through an overset grid assembler, TIOGA. Simulations are performed for Penn State University Phase III and low-drag hubs with a far-wake stabilizer, and results are compared against the water tunnel test data including drag coefficient of the hubs, lift coefficient of the stabilizer, and time-averaged velocity wake profiles.