Generally, Gas Foil Bearings (GFBs) are used in high speed machineries which are quite prone to instability or wear and tear. The current trend is to develop hybrid bearings which has conventional bearing (GFB) along with active magnetic bearing as an electromagnetic actuator (EMA). The GFBs are used for normal operation and the magnetic actuator can be used for the improvement of the stability and the load capacity of the bearing. In the present work a numerical study has been carried out to study the effects of magnetic actuator on the stability of bump type GFB supported rigid rotor. A rigid rotor supported on two identical GFBs with and without EMA has been investigated. The electromagnetic forces are incorporated in the equation of motion to provide the active control. A PD controller has been used as a controller for the magnetic actuator. It has been observed that the incorporation of EMA to the GFB reduces the sub synchronous vibrations and hence increases the stability.
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ASME 2017 Gas Turbine India Conference
December 7–8, 2017
Bangalore, India
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5851-6
PROCEEDINGS PAPER
A Numerical Study on Effect of Electromagnetic Actuator on Rigid Rotor Supported on Gas Foil Bearing
Kamal Kumar Basumatary,
Kamal Kumar Basumatary
Indian Institute of Technology Guwahati, Guwahati, India
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Gaurav Kumar,
Gaurav Kumar
Indian Institute of Technology Guwahati, Guwahati, India
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Karuna Kalita,
Karuna Kalita
Indian Institute of Technology Guwahati, Guwahati, India
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Sashindra Kumar Kakoty
Sashindra Kumar Kakoty
Indian Institute of Technology Guwahati, Guwahati, India
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Kamal Kumar Basumatary
Indian Institute of Technology Guwahati, Guwahati, India
Gaurav Kumar
Indian Institute of Technology Guwahati, Guwahati, India
Karuna Kalita
Indian Institute of Technology Guwahati, Guwahati, India
Sashindra Kumar Kakoty
Indian Institute of Technology Guwahati, Guwahati, India
Paper No:
GTINDIA2017-4607, V002T05A006; 9 pages
Published Online:
February 2, 2018
Citation
Basumatary, KK, Kumar, G, Kalita, K, & Kakoty, SK. "A Numerical Study on Effect of Electromagnetic Actuator on Rigid Rotor Supported on Gas Foil Bearing." Proceedings of the ASME 2017 Gas Turbine India Conference. Volume 2: Structures and Dynamics; Renewable Energy (Solar, Wind); Inlets and Exhausts; Emerging Technologies (Hybrid Electric Propulsion, UAV,..); GT Operation and Maintenance; Materials and Manufacturing (Including Coatings, Composites, CMCs, Additive Manufacturing); Analytics and Digital Solutions for Gas Turbines/Rotating Machinery. Bangalore, India. December 7–8, 2017. V002T05A006. ASME. https://doi.org/10.1115/GTINDIA2017-4607
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