... technologies [ 3 ]. This work is undertaken to make a profound investigation of the steady-state and dynamic performance of the micro gas-lubricated hybrid thrust bearings. The molecular gas-film lubrication (MGL) model [ 20 ] is utilized as the lubrication model, which considers the rarefaction effects...

... prohibited due to the reliability issues relevant to unique aero-propulsion environments such as severe rubbing due to the very slow acceleration of typically heavy rotors. This paper presents a hybrid air foil bearing (a combination of hydrostatic and hydrodynamic) with 102 mm in diameter designed for aero...

...Donghyun Lee; Daejong Kim Air foil bearings (AFBs) have been recognized as the most promising for oil-free turbomachinery. However, the applications of AFBs to the relatively large turbomachinery have many technical challenges due to limited load capacity and wear during start/stops. A hybrid air...

...Rory A. Roberts; Jack Brouwer; G. Scott Samuelsen Fuel Cell/Gas Turbine (FC/GT) hybrid technology is promising, but introduces challenges in system operation and control. For base-load applications, changes in ambient conditions perturb the system and it becomes difficult to maintain constant power...

...Manish Kumar; Daejong Kim Airfoil bearings offer many advantages over oil-lubricated bearings, but they have reliability issues during start∕stops (wear) and limited heat dissipation capability. To address these issues, a hybrid airfoil bearing (HAFB) combining hydrodynamic airfoil bearing...