... interferometric experiments. It was observed that despite a constant surface speed and load, the motion remained transient due to the transition between outlet cavitation and inlet starvation. The reciprocating motion of the cavitation zone rapidly depleted the contact area, leading to severe surface peeling...

...Hao Zhang; Xiaohui Lin; Shuyun Jiang The water-lubricated bearings tend to be turbulent and cavitating when running at a high speed. However, the modeling of the water-lubricated bearing considering the turbulence and cavitation effects has not been studied thoroughly. For high-speed water...

..., a novel numerical method coupling the dynamic loading, squeeze motion, analytical pressure deformation, mixed friction, and cavitation was proposed to study the lubricating performance of micro-textured valve plate/cylinder block interface. This model was then validated comparing to the tribometer...

... with unsteady flow channel variation. First, the pin and the connecting rod are considered as rigid bodies, and 3D numerical analysis of the cavitating lubricating oil flow is performed when combustion load is applied to the pin. We find that dynamic pressure does not increase around the connecting rod edge...

... and Sommerfeld number, the eccentricity ratio, leakage flowrate, friction coefficient, and attitude angle were obtained using tabulated solutions under the assumptions of flooded condition and Reynolds boundary condition for cavitation. The total flowrate was determined by using an empirical equation considering...

... a machine learning model capable of approximating the pressure solution of the Reynolds equation for a journal bearing with given distributive geometric boundary conditions and considering cavitation and elastic deformation at steady-state operating conditions. A 1024-sample training set was generated using...

... characteristics under the mass conversation boundary condition are compared with classical boundary conditions. The results indicate that the film pressure distribution, velocity distribution, and size and shape of the cavitation zone vary greatly under different boundary conditions in the clearance divergence...

...Fan Zhang; Nicolas Fillot; Rudolf Hauleitner; Guillermo E. Morales-Espejel A first cavitation modeling with thermal effects for oil/refrigerant solutions lubricated elastohydrodynamic point contacts is reported in this work. The solubility of the oil/refrigerant system is introduced...

...Wanjun Xu; Shanhui Zhao; Zhengyang Geng; Miaomiao Niu In order to reduce the dependence of accuracy on the number of grids in the Ausas cavitation algorithm, a modified Ausas algorithm was presented. By modifying the mass-conservative Reynolds equation with the concept of linear complementarity...

...S. Boedo This paper describes a computationally efficient, finite element implementation of a generalized short bearing (GSB) formulation to account for mass conservation in cavitated bearing regions. The method is applied to a set of examples representing partial and full journal bearings under...

... model for the water-lubricated textured spiral groove thrust bearing under laminar cavitating flow, and field distribution and static characteristics of the bearing are analyzed using the model. A verified test indicates that the theoretical simulation agrees with the experimental value. The result...

... lubricant supply cavitation elastohydrodynamic lubrication gears Starvation of lubricant has been frequently observed in mechanical rolling elements [ 1 – 3 ]. It plays an important role in friction [ 4 ], wear [ 5 ], scuffing failure [ 6 ], and rolling contact fatigue [ 7 , 8 ]. Utilizing...

... the cavitating, centrifugal, and turbulent effects is established for the double-pad water-lubricated SGTB operating at a high-speed condition. Subsequently, the film thickness and volume flowrate are verified by an experimental study for the high-speed water-lubricated SGTBs. Finally, the effects...

...Shuangbiao Liu; Liangwei Qiu; Zhijian Wang; Xiaoyang Chen Studying elastohydrodynamic lubrication (EHL) of line contacts involving micro-cavitations, this paper examines various numerical solutions with a focus on their explicit flow continuities from inlet to exit. For the first time, influences...

... cavitation algorithm (p − θ cavitation algorithm), where a modified smoothing switch function is raised for better convergence. Focusing on the normal direction to reciprocation, the load-guideway system is simplified as a single-degree-of-freedom linear time-varying system and solved by Newmark-β method...

... discretized using the finite element formulation followed by the solution of algebraic equations employing the Fischer-Burmeister-Newton-Schur (FBNS) algorithm, which satisfies the mass-conservation phenomenon arising due to the commencement of cavitation in the lubricating film. The effects of parameters...

... be found up to now. In this study, a comparative study on the dynamic characteristics of the two types of SGTBs is conducted. First, a turbulent lubrication model considering centrifugal and cavitating effects for the double-pad SGTB is developed based on gas–liquid two-phase flow. The steady-state...

... the saturation pressure with potentially hazardous effects on the performance of the gas bearing. The present work introduces a model based on the Reynolds equation and the development of cavitation modeling in liquid-lubricated bearings for condensing gas bearings. The effect of condensation on load capacity...

...Itzhak Green References [1] Brunetière , N. , 2018 , “ A General Model for Liquid and Gas Lubrication, Including Cavitation ,” ASME J. Tribol. , 140 ( 2 ), p. 021702 . 10.1115/1.4037355 [2] Ruan , B. , Salant , R. , and Green , I. , 1997 , “ A Mixed Lubrication...

... Cavitation Fluid film lubrication Gas (air) bearings Hydrodynamic lubrication The author of paper [ 1 ] would like to thank Professor Green for the relevant discussion. He highlights some oversights in the state of the art and comparison to previous work, first on face seal analysis and second...