Investigation of Combined Effects of Rotational Inertia and Viscosity–Pressure Dependency on the Squeeze Film Characteristics of Parallel Annular Plates Lubricated by Couple Stress Fluid

Daliri, Maghsood; Jalali-Vahid, D.

doi:10.1115/1.4029796

Cited by 5 publications

(4 citation statements)

References 23 publications

(24 reference statements)

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“…For lubricated parallel annular discs, combined with squeeze film and shear motions, Daliri et al [7] showed that contact load-carrying capacity increases by the presence of magnetohydrodynamic couple stress fluids. For the same geometry of parallel annular plates, however, increased rotational inertia can diminish the squeeze film characteristics [8]. Parallel disc lubrication film geometry, with rough surfaces where the lubricant is piezoviscous couple stress, is also studied by Daliri and Jalali-Vahid [9].…”

Section: Introductionmentioning

confidence: 99%

The Performance of Squeeze Film between Parallel Triangular Plates with a Ferro-Fluid Couple Stress Lubricant

Toloian

Daliri

Javanı

2020

Advances in Tribology

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The present study aims at investigating a couple stress ferrofluid lubricant effects on the performance of the squeezed film when a uniform external magnetic field is applied. For this purpose, Shliomis ferrohydrodynamic and couple stress fluid models are employed. The considered geometry is parallel triangular plates. The effects of couple stress, volume concentration, and Langevin parameters on squeeze film characteristics including time vs. height relationship and load-carrying capacity are investigated. According to the results, employing couple stress ferrofluid lubricant in the presence of the magnetic field leads to an increased performance of the squeeze film.

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Section: Introductionmentioning

confidence: 99%

The Performance of Squeeze Film between Parallel Triangular Plates with a Ferro-Fluid Couple Stress Lubricant

Toloian

Daliri

Javanı

2020

Advances in Tribology

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“…Daliri, Metet et al [1] analyzed the viscosity variation with pressure to obtain squeeze film characteristics by modified Reynolds equation and Stoke's microcontinuum. Jaw-Ren Lin et al [2] analyzed the effects of viscosity-pressure dependency and studied the impacts of squeezed films between parallel circular plates of non-Newtonian coupled stress fluid lubrication.…”

Section: Introductionmentioning

confidence: 99%

Performance of Spiral Groove Dry Gas Seal for Natural Gas Considering Viscosity-Pressure Effect of the Gas

Sun

Song

2020

Lecture Notes in Electrical Engineering

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Centrifugal compressors used for transporting nature gas are usually equipped with dry gas seals. The working medium of the seal is usually the delivered gas, that is, natural gas. In this paper, the natural gas viscosity-pressure equation is derived from the Pederson mixed gas viscosity model and Lucas viscosity-pressure model, and the real gas property of natural gas is expressed by Redlich-Kwong equation. The gas film pressure governing equations proposed by Muijderman for narrow grooves are modified and solved for the seal faces. The influences of natural gas viscosity-pressure effect on the sealing characteristics, such as leakage rate and opening force, of spiral groove dry gas seal are analyzed. Results show that the viscosity-pressure effect has significant influence on spiral groove dry gas seal. This effect reduces the leakage rate but increases the opening force, compared to the situation without considering the viscosity-pressure effect. With the pressure up to 4MPa, the viscosity-pressure effect of natural gas is weak and negligible. As the pressure increases, the viscosity-pressure effect increases. At 12MPa, the relative deviations of leakage rate and opening force caused by the viscosity-pressure effect are respectively -30.6% and 1.65%. Therefore, the analyses indicate that the viscosity-pressure effect of nature gas needs to be considered when used in high pressure situation.

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“…To relieve rigid impact and promote torque capacity during the extrication of the cutter-head, the hydro-viscous clutch (HVC) has recently been applied to the driving system of the TBM cutter-head by many researchers, and the inside structure and working principle of the HVC have been introduced [1][2][3][4]. Liao et al [5][6][7][8][9] designed a new kind of cutter-head driving system which includes a flywheel and HVC in each cutter-head driving chain, and the popular variable-frequency method is still used.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Method for Extrication Characteristics of TBM Cutter-Head with the HVC

Gong

Xie

Yang

2019

Chin. J. Mech. Eng.

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Achieving highly efficient extrication of the tunnel boring machine (TBM) cutter-head driving system from the collapsed surrounding rock has become a key problem globally, and significant effort has been directed to improve TBM cutter-head extricating ability. In this study, the characteristics of a hydro-viscous device have been investigated to improve extricating performance of the TBM cutter-head. A numerical method based on an explicit pressure-linked equation is presented for computing the film parameters of the HVC, which is then applied to investigate extrication characteristics of a TBM cutter-head with a hydro-viscous clutch (HVC). The explicit pressure-linked equation is derived from the Navier-Stokes equations and the conservation equation, where boundary conditions are involved. The model of a cutter-head driving system with an HVC is established, and the extrication characteristics of the cutterhead driving system are analyzed and compared with three extrication strategies. The variation in extrication torque shows that the linear strategy or positive parabolic strategy are preferred for their relatively high extrication efficiency and low rigid impact, and the effects of throughflow rate on torque transmission are also investigated. The test rig of the TBM cutter-head driving system was set up to validate the numerical method and the model of a cutter-head driving system, and the feasibility of the proposed numerical method for researching the extrication of the TBM cutter-head is verified.

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Investigation of Combined Effects of Rotational Inertia and Viscosity–Pressure Dependency on the Squeeze Film Characteristics of Parallel Annular Plates Lubricated by Couple Stress Fluid

Cited by 5 publications

References 23 publications

The Performance of Squeeze Film between Parallel Triangular Plates with a Ferro-Fluid Couple Stress Lubricant

The Performance of Squeeze Film between Parallel Triangular Plates with a Ferro-Fluid Couple Stress Lubricant

Performance of Spiral Groove Dry Gas Seal for Natural Gas Considering Viscosity-Pressure Effect of the Gas

A Numerical Method for Extrication Characteristics of TBM Cutter-Head with the HVC

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