곽용석 정진택 이용복 김창호 2024-01-20T23:02:41Z 2024-01-20T23:02:41Z 2021-09-06 2008-07 1226-4873 https://pubs.kist.re.kr/handle/201004/133342 To improve the operational stability of the 100 Watts class Micro Gas Turbine, the air foil bearing with additional damping material has been investigated. The key of structure is that a viscoelastic material is coated under the top foil. The compliant foil journal bearing and thrust bearing are designed to withstand high load of vibrations at the operational speed 870,000 rpm. Test is executed in room temperature. Rotor has stably operated above 480,000 rpm. It is over 55% of the designed speed 870,000 rpm. Synchronous and subsynchronous vibrations are both well controlled. Vibration amplitude diminished over 50%. With the help of increased damping resulting from the viscoelasticity, the rotor stability of Micro turbocharger has been improved Korean 대한기계학회 공기 포일 베어링으로 지지되는 초고속 마이크로 터보차져의 구동 안정성 향상에 관한 연구 Stability Improvement of the Ultra-High Speed Micro Turbocharger Supported by Air Foil Bearings Article 1 대한기계학회논문집 A, v.32, no.7, pp.541 - 548 대한기계학회논문집 A 32 7 541 548 scopus kci ART001257046 Micro Gas Turbine Engine(마이크로 가스터빈 엔진) Air Foil Bearing(공기 포일 베어링) Viscoelastic Material(점탄성 물질) Rotor Instability(회전체 불안정성) Micro Gas Turbine Engine(마이크로 가스터빈 엔진) Air Foil Bearing(공기 포일 베어링) Viscoelastic Material(점탄성 물질) Rotor Instability(회전체 불안정성)