“…Given the uncertainty surrounding both the expected leakage and rotordynamic performance of the floating bushing seals, a number of other seal technologies were also explored for their viable use with the GEL bearing test rig. These seals included lip seals [122,123], labyrinth seals [124][125][126][127][128][129][130][131][132][133][134], a variety of annular seals including bushing, ring, honeycomb, and hole pattern seals [135][136][137][138][139][140][141][142][143][144][145][146], centrifugal motion seals [47,147,148], and mechanical seals [149][150][151][152][153][154][155][156][157][158][159][160][161][162][163]. However, these sealing technologies also faced a number of technical hurdles to being implemented in GEL environments including Hence, after considering the uncertainty surrounding the cu...…”