Experimental and theoretical studies of the dynamic behavior of a spiral-groove dry gas seal at high-speeds

Chen, Yuan; Peng, Xudong; Jiang, Jinbo; Meng, Xiangkai; Li, Jiyun

doi:10.1016/j.triboint.2018.04.005

Cited by 43 publications

(22 citation statements)

References 21 publications

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“…To further study the internal evolution law of a microscale flow field, when the specific flow regime of the DGS rotating flow field is uncertain, laminar and turbulent regimes are, respectively, selected for analysis. The Navier-Stokes equation applicable to a thin fluid film, including circumferential, radial and axial directions, is shown as (5).…”

Section: B Numerical Modelmentioning

confidence: 99%

“…In 1979, Gabriel first proposed the spiral groove dry gas seal (S-DGS) based on the hydrostatic and hydrodynamic principle in [1]. Since then, many scholars in [2]- [5] have analyzed the performance of this structure using numerical and computational fluid dynamics methods. The quality of dry gas seal (DGS) performance analysis largely depends on the scientific definition of the flow regime of the microscale rotating flow field between the seal pairs.…”

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confidence: 99%

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Microscale Flow Field Analysis and Flow Prediction Model Exploration of Dry Gas Seal

Wang

Huang

et al. 2020

IEEE Access

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The characteristics of high speed, high pressure, microscale, and rotating flow fields result in very complicated flow between the dynamic and static rings of a dry gas seal. In particular, the existence of a groove, dam, and weir further contribute to the uncertainty of a microscale flow field. Classically, the flow regime of pipe flow is determined based on the critical Reynolds number (Pipe model) while the rotating flow field is sometimes determined by the flow factor (Oval model). In this study, a new method was developed that can be used for prediction of flow regime of a dry gas seal rotating flow field based on a three-dimensional velocity component (Ellipsoid model). The aim was to make the given model reflect the flow regime more realistically based on the consideration of the axial velocity component. When modeling dry gas seal rotating flow fields, we showed that compared to the one-dimensional Pipe model and the two-dimensional Oval model, the three-dimensional Ellipsoid model proposed in this paper can produce more accurate results. QIONG HU received the Ph.D. degree in mechanical engineering from Nanjing Forestry University, Jiangsu, China, in 2016. She worked as an Engineer with NGC, Jiangsu, until March 2018. She has a half-year experience of studying with the Department of Mechanical Engineering, Louisiana State University. She is currently a Lecturer and teaches several professional courses of mechanical engineering with Jiangsu Ocean University, Jiangsu. She has published 14 research articles in the journals. Her research interests include fluid sealing technology, tribology, numerical simulations, and heat transfer.

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Section: B Numerical Modelmentioning

confidence: 99%

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confidence: 99%

Microscale Flow Field Analysis and Flow Prediction Model Exploration of Dry Gas Seal

Wang

Huang

et al. 2020

IEEE Access

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“…For a more comprehensive model of a high-speed fluid lubricated bearing, additional effects could be included in the fluid film model, however, this greatly increases the model complexity. These effects include inertial effects (Bailey et al (2018)), surface roughness (Varney (2017)), thermal effects (Blasiak (2015)), non-axisymmetric/three dimensional geometry (Green (2002)) and possible surface features, for example spiral grooves (Chen et al (2018)) or modified surface topographies (Blasiak & Zahorulko (2016)). These effects are neglected in the current work as they are secondary effects; a simpler fluid film model allows results to be obtained which reflect the main characteristics of the technology without being overburden with additional complexity of these secondary effects.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, Green (2001) monitored the dynamic behaviour of the seal, and by changing the fluid film stiffness and damping coefficients, controlled the closing force in real time. More recently, Chen et al (2018) examined the transient-state film thickness and leakage rate of a dry gas seal at high speeds. To date there has not been explicit experimental examination of the effect of external forcing on the dynamic behaviour of a fluid lubricated bearing, which requires a new purpose built rig.…”

Section: Introductionmentioning

confidence: 99%

Effect of random forcing on fluid-lubricated bearing

Bailey

Hibberd

Tretyakov

et al. 2019

IMA Journal of Applied Mathematics

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A model for a fluid lubricated bearing is derived for operation under conditions where external forces are subject to random fluctuations that may act to destabilise the bearing. The fluid flow through the bearing is described by a Reynolds equation for incompressible flow and is coupled to the axial displacement of the bearing faces as modelled by spring-mass-damper systems. Representative dynamics of a highly rotating bearing subject to external potentially destabilising random forcing is developed. An external force characterised by a noise term is imposed on the rotor, where both white noise and coloured noise are considered. For industrial applications it is important to evaluate potential bearing failure that can arise when the face clearance becomes sufficiently small. Therefore, a quantity of interest is the average time for the face clearance to reach a prescribed tolerance. A computational technique to evaluate the bearing characteristics is implemented based on a simple random walk for a Dirichlet problem for a linear parabolic partial differential equation combined with a Monte Carlo technique. Results of numerical experiments are presented, to give indicative predictions of possible face contact, which has the potential to result in bearing failure.

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“…Recently, a growing attention has been paid to apply the DGS to low-speed equipment, such as pumps and reactors [1,2]. The DGS is less costly to fabricate and maintain, more energyefficient and more durable than the other seals commonly used in fluid machines, namely, labyrinth seal, mechanical seal that seals up gas with oil, and the combination of mechanical seal and floating-ring seal [3].…”

Section: Introductionmentioning

confidence: 99%

Steady Simulation of T-groove and Spiral Groove Dry Gas Seals

Gao¹

2019

IJHT

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Dry gas seal (DGS) is a novel sealing method with broad prospects in various shaft sealing applications. it is vital for the design of dry gas seals to achieve flow field information by numerical method, including the influences of the Parameters of DGS on sealing performance. Based on FLUENT, this paper explores the three-dimensional (3D) flow fields of the DGS of spiral groove and T-groove at different rotation speeds, outer radius pressures and gas film thicknesses, and obtains the numerical features (e.g. pressure distribution) of the DGS under different working conditions. The results show that the rotation speed of the DGS has a promoting effect on the hydrodynamic effect, while the outer radius pressure and gas film thickness both suppress the hydrodynamic effect. The research findings provide an important reference for the design and manufacturing of fluid machines like pumps and stirring reactors.

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Experimental and theoretical studies of the dynamic behavior of a spiral-groove dry gas seal at high-speeds

Cited by 43 publications

References 21 publications

Microscale Flow Field Analysis and Flow Prediction Model Exploration of Dry Gas Seal

Microscale Flow Field Analysis and Flow Prediction Model Exploration of Dry Gas Seal

Effect of random forcing on fluid-lubricated bearing

Steady Simulation of T-groove and Spiral Groove Dry Gas Seals

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