Magnetorheological throttle valve in passive damping systems

The present paper considers the efficiency of modelling experimental pressu re-flowrate characteristics of an MR throttle valve by a technique, accordi ng to which hydraulic resistance coefficient of a valve is determined as a function of Reynolds and Hedstrom numbers. In predictions, an MR fluid is c haracterised by density, out-of-field viscosity and yield stress. It is sho wn that the hydraulic characteristics of a valve predicted by Hedstrom's te chnique are fit to the experimental ones over the entire range of magnetic field and MR fluid flowrate. The procedure for prediction of valve paramete rs that allows a damper design to be optimised is presented.