Lee, YB Kwak, HD Kim, CH Jang, GH 2024-01-21T11:43:11Z 2024-01-21T11:43:11Z 2021-09-05 2001-10 1040-2004 https://pubs.kist.re.kr/handle/201004/140162 Due to the limitation of micro-machining technology, the bearing aspect ratio for a micro gas turbine is limited to a small value. Therefore, the load-carrying capacity of such bearing is inherent ly small. Thus, it is desirable to predict the load-carrying capacity as accurately as possible without being unnecessarily conservative. The direct numerical analysis of bearing characteristics was performed by mass conservation at coupled boundary. Journal bearing was numerically simulated for two cases -1) an externally pressurized bearing with four feeding holes and 2) a hydrodynamic bearing. Characteristics such as pressure distribution at the bearing surface, load-carrying capacity as a function of aspect ratio with a coupled boundary effects are investigated for micro gas turbine bearings. It is shown that a model of thrust and journal bearings coupled at boundary generally predicts a greater load-carrying capacity than uncoupled models. English SOC TRIBOLOGISTS & LUBRICATION ENGINEERS Analysis of gas-lubricated bearings with a coupled boundary effect for micro gas turbine Article 10.1080/10402000108982511 1 TRIBOLOGY TRANSACTIONS, v.44, no.4, pp.685 - 691 TRIBOLOGY TRANSACTIONS 44 4 685 691 scie scopus 000171656600022 2-s2.0-0034760539 Engineering, Mechanical Engineering Article; Proceedings Paper gas-lubricated bearings load-carrying capacity coupled boundary