Static and dynamic performance characteristics of an orifice compensated hydrostatic journal bearing with non-Newtonian lubricants

A study of 2-lobe symmetric hole entry hybrid journal bearing operating with non-Newtonian lubricant considering thermal effects

“…The non-linear relation between shear stress and shear strain rate of most of the polymerthickened oils or lubricants are adequately defined and characterized by the cubic law fluid model [11,12,[15][16][17][18][19]. The cubic law fluid model is defined in non-dimensional form by the following relations [11,15,18,29,34]:…”

“…The cubic law fluid model is defined in non-dimensional form by the following relations [11,15,18,29,34]:…”

“…During the last few decades, many studies [11][12][13][14][15][16][17][18][19] have been carried out in the field of circular hydrostatic/hybrid bearings considering the non-Newtonian rheology of lubricants.…”

“…Sinhasan and Sah [11] analytically investigated the influence of cubic law lubricant on the performance characteristics of circular hydrostatic journal bearing. The effect of nonlinear behavior of lubricant on flexible bearing system was carried out by Sharma et al [12] They reported that the nonlinear behavior of lubricant defined by a cubic shear stress law and a power law alters the dynamic response of a bearing system.…”

On Non-Newtonian Rabinowitsch Fluid Squeeze Film Lubrication between Rough Circular Stepped Plates

“…This model can be applied to the Newtonian lubricant for κ * = 0, dilatant lubricants for κ * < 0 and pseudo plastic lubricants κ * > 0. By applying this Rabinowitsch fluid model, many investigators have studied the effect of non-Newtonian lubricants on the performance characteristics of hydrodynamic thin film bearings, for example, the problems of slot entry journal bearing by Sharma et al [3], the hydrostatic journal bearings by Sinhasan and Sah [4], the journal bearings by Hsu [5] and Bourgin and Gay [6], the slider bearings by Hashimoto [7], and Lin [8], and circular-disk squeeze film by Hashimoto [9]. Usha and Vimala [10] studied the squeeze film lubrication between two plane annuli and between parallel plates by Hung [11].…”