Flow Field Analysis of Throttling Aperture of a New Magneto-rheological Shimmy Damper

Abstract

Orifice is the main ways of magneto-rheological shimmy damper to produce damping. Under the actual working environment of magneto-rheological shimmy damper, the stress changes such as variable viscosity can be caused by different magnetic field distribution while the magneto-rheological fluid is passing through the magnetic field. The calculation model of magneto-rheological shimmy damper is established. The commercial software Fluent is used to analyze the flow field caused by magneto-rheological shimmy damper by changing the size of throttle aperture, and the simulation results are compared with the experimental results. The results show that the main reasons for determining the initial damping and time delay effect are the flux and jam of magneto-rheological fluid. The time-delay effect is the most obvious when the throttling aperture diameter is 0.2 mm, and the response speed of the magneto-rheological shimmy damper to external excitation is decreased significantly with the increase of frequency.

Keywords

• magneto-rheological shimmy damper
• throttle aperture diameter
• flow field analysis
• simulation research