TY - JOUR
T1 - Thermohydrodynamic analysis of bump-type gas foil bearings using bump thermal contact and inlet flow mixing models
AU - Sim, Kyuho
AU - Kim, Tae Ho
PY - 2012/4
Y1 - 2012/4
N2 - Implementation of gas foil bearings (GFBs) in high-temperature applications requires a reliable thermal model that accounts for heat transfers within the rotor-GFB system. The proposed thermohydrodynamic (THD) model takes into account energy transports in air film, heat conductions of shaft, thermal resistance of bump layer, and heat conduction in GFB housing. The model also incorporates analytical models for bump thermal contact and inlet flow mixing to improve the prediction accuracy. Published experimental test data benchmark the THD model predictions. Finally, this paper proposes a new GFB cooling scheme, i.e., supplying a cooling flow radially into the inlet flow mixing zone.
AB - Implementation of gas foil bearings (GFBs) in high-temperature applications requires a reliable thermal model that accounts for heat transfers within the rotor-GFB system. The proposed thermohydrodynamic (THD) model takes into account energy transports in air film, heat conductions of shaft, thermal resistance of bump layer, and heat conduction in GFB housing. The model also incorporates analytical models for bump thermal contact and inlet flow mixing to improve the prediction accuracy. Published experimental test data benchmark the THD model predictions. Finally, this paper proposes a new GFB cooling scheme, i.e., supplying a cooling flow radially into the inlet flow mixing zone.
KW - Gas foil bearings (GFBs)
KW - Inlet flow mixing
KW - Thermal contact resistance (TCR)
KW - Thermohydrodynamic (THD) analysis
UR - https://www.scopus.com/pages/publications/84857235585
U2 - 10.1016/j.triboint.2011.11.017
DO - 10.1016/j.triboint.2011.11.017
M3 - Article
AN - SCOPUS:84857235585
SN - 0301-679X
VL - 48
SP - 137
EP - 148
JO - Tribology International
JF - Tribology International
ER -