공기포일베어링에 지지된 마이크로가스터빈의 회전체동역학적 설계

Rotordynamic Design of the Micro Gas Turbine Supported by Air Foil Bearings

  • 김영철 (한국기계연구원 회전체그룹) ;
  • 한정완 (한국과학기술원 기계공학과) ;
  • 김경웅 (한국과학기술원 기계공학과) ;
  • 김수용 (한국기계연구원 회전체그룹)
  • 발행 : 2003.12.05

초록

This paper presents a performance analysis of the 1st generation bump foil journal bearings for the micro gas turbine TG75. Static performances such as load capacity and attitude angle are estimated by using soft elasto-hydrodynamic analysis technique, and dynamic performances such as stiffness and damping coefficients are estimated by perturbation method. Rotordynamic analysis for TG75 is performed by using the bearing analysis results. TG75 rotor has 2 horizontal and vertical directional natural modes due to the bearing stiffness characteristics. TG75 rotor will be stably operated between the 1st bending mode at 33000cpm and the 2nd bending mode at 85500cpm. Unbalance response analysis results satisfy the API vibration criteria.

키워드