Effect of Temperature on the Performance of Squeeze Film Damper Lubricated With Magnetorheological Fluid
G. Saravanakumar1, L. Ravikumar2, H. P. Jagadish3
1G. Saravanakumar, Assistant Professor, Department of Mechanical Engineering, BMS College of Engineering, Bangalore (Karnataka), India.
2Dr. L. Ravikumar, Professor, Department of Mechanical Engineering, BMS College of Engineering, Bangalore (Karnataka), India.
3Dr. H. P. Jagadish, Associate Professor, Department of Mechanical Engineering, BMS Evening College of Engineering, Bangalore (Karnataka), India.
Manuscript received on 12 October 2013 | Revised Manuscript received on 20 October 2013 | Manuscript Published on 30 October 2013 | PP: 160-164 | Volume-3 Issue-5, October 2013 | Retrieval Number: E1288103513/13©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Modern machines demands high speed of rotation and thus requires provision of damping externally to the rotor system to reduce large force small amplitude vibrations. Magnetorheological fluid squeeze film dampers are new kind of dampers used in such applications. The viscosity of these fluids can be readily varied by changing the magnetic field intensity to reduce the vibrations. Magnetorheological fluids squeeze film dampers usually provide variable stiffness and damping at a particular excitation frequency by varying the coil current. This paper examines the performance of such dampers under the influence of temperature which changes due to the coil current flowing through the magnet, wide operating range of the rotor system. The analysis is conducted for every 10oC change in the temperature as mentioned in the earlier work and viscosity change and its effect on the performance of the damper is evaluated theoretically. The stiffness and damping characteristics decrease with increase in temperature. The results are plotted and it provides information on the effect of temperature effect on the performance of Magnetorheological fluid squeeze film dampers.
Keywords: Squeeze Film Damper, Temperature Change, Stiffness and Dynamic Characteristics, Magnetorheological Fluid, Speed.
Scope of the Article: Fluid Mechanics