A Computational Method for Cavitation in a Wavy Mechanical Seal

Payvar, Parviz; Salant, Richard F.

doi:10.1115/1.2920861

Cited by 137 publications

(64 citation statements)

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“…Elrod and Adams, 3 Vijayaraghavan and Keith, 4 Payvar and Salant. 5 These JFO-type algorithms have produced results that are in satisfactory agreement with experimental values. [6][7][8][9] In spite of the success of the Reynolds and JFO cavitation conditions, there are still limitations in the following aspects.…”

Section: Introductionsupporting

confidence: 79%

Development and validation of a gaseous cavitation model for hydrodynamic lubrication

Song

Ren

2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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The prediction of cavitation in lubricants is of significance to the design and analysis of hydrodynamic bearings. In this paper, a numerical model for the gaseous cavitation in hydrodynamic lubrication problems is derived based on the cavitation mechanism and origination, which is different from the conventional cavitation conditions. The proposed gaseous cavitation model is then used to calculate the performance of several types of bearings, including a two-axially grooved plain journal bearing, a misaligned journal bearing and parallel thrust bearings with surface textures. The results are validated with experimental data and numerical results calculated by the Half-Sommerfeld, Reynolds, and JFO conditions. The advantage of this new model lies in its accuracy and its independence from the cavitation pressure, which is usually difficult to be accurately defined. Thus this gaseous cavitation model can be useful in the accurate prediction of the cavitation phenomenon and performance of hydrodynamic bearings under steady state.

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Section: Introductionsupporting

confidence: 79%

Development and validation of a gaseous cavitation model for hydrodynamic lubrication

Song

Ren

2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…The Elrod [17] cavitation model was later modified to improve its computational stability by Vijayaraghavan and Keith [19], Paydas and Smith [20], Hirani et al [21], Payvar and Salant [22], and Xiong and Wang [23]. Alternative models, including the mass-conserving flow through the cavitation region have also been developed, such as that of Giacopini et al [24].…”

Section: Introductionmentioning

confidence: 99%

Big End Bearing Losses with Thermal Cavitation Flow Under Cylinder Deactivation

et al. 2015

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The paper presents a mixed thermo-hydrodynamic analysis of elliptic bore bearings using combined solution of Navier-Stokes, continuity and energy equations for multi-phase flow conditions. A vapour transport equation is also included to ensure continuity of flow in the cavitation region for the multiple phases as well as Rayleigh-Plesset to take into account the growth and collapse of cavitation bubbles. This approach removes the need to impose artificial outlet boundary conditions in the form of various cavitation algorithms which are often employed to deal with lubricant film rupture and reformation. The predictions show closer conformance to experimental measurements than have hitherto been reported in the literature. The validated model is then used for the prediction of frictional power losses in big end bearings of modern engines under realistic urban driving conditions. In particular, the effect of cylinder deactivation (CDA) upon engine bearing efficiency is studied. It is shown that bigend bearings losses contribute to an increase in the brake specific fuel consumption with application of CDA contrary to the gains made in fuel pumping losses to the cylinders. The study concludes that implications arising from application of new technologies such as CDA should also include their effect on tribological performance.

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“…According to the Payvar-Salant [27,28] model, the steady-state mass-conservation Reynolds equation, taking cavitation into account, in a Cartesian coordinate system can be written as Equation (2) [29]:…”

Section: Methodsmentioning

confidence: 99%

The Influence of Surface Texturing on the Film Thickness in Starved Lubricated Parallel Sliding Contacts

Bijani¹,

Deladi²,

Rooij

et al. 2018

Lubricants

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Abstract:In industrial applications, a starved lubrication condition may occur, leading to a reduction in film thickness; by modifying the surface geometry, the tribological performance of the contact is enhanced. In this paper, the influence of surface texturing as a method for reducing the friction on the film thickness in parallel sliding surfaces for starved lubricated contacts is investigated. The results in this study have shown that surface texturing can improve film formation for starved lubricated contacts and, respectively, the load carrying capacity. The effect of starvation on several texturing patterns with several texturing properties was investigated and the film thickness for these conditions was studied. With the numerical algorithm developed and taking cavitation into consideration, the effect of shape, depth, size, and texture pitch on the film thickness was studied.

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A Computational Method for Cavitation in a Wavy Mechanical Seal

Cited by 137 publications

References 0 publications

Development and validation of a gaseous cavitation model for hydrodynamic lubrication

Development and validation of a gaseous cavitation model for hydrodynamic lubrication

Big End Bearing Losses with Thermal Cavitation Flow Under Cylinder Deactivation

The Influence of Surface Texturing on the Film Thickness in Starved Lubricated Parallel Sliding Contacts

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