A fractal model for gaseous leak rates through contact surfaces under non-isothermal condition

Zheng, Qiang; Xu, Jianlin; Yang, Bin; Yu, Bo

doi:10.1016/j.applthermaleng.2012.11.011

Cited by 28 publications

(17 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Huang et al [21] introduced the fractal porous media theory into the study of the leakage mechanism of metal gaskets and established a theoretical prediction model of the leakage rate of metal gaskets. The results showed that the predicted value is consistent with the measured value and the gasket's roughness significantly influences the leakage rate [22]. Based on the relationship between hard metal's roughness and leakage, Peng et al [23] proposed the magnification-based theory and multi-asperity theory.…”

Section: Introductionsupporting

confidence: 66%

Calculation Model of Mechanical and Sealing Properties of NiTi Alloy Corrugated Gaskets under Shape Memory Effect and Hyperelastic Coupling: Two Sealing Properties

Zhu

Liu

et al. 2022

Materials

View full text Add to dashboard Cite

Bolted flange connections are commonly used in process industries. Their sealing performance is greatly affected by the gasket. In this paper, a NiTi alloy corrugated gasket was simulated to reveal its sealing performance, considering the gasket surface roughness, shape memory effect and superelastic effect. A fluid–structure coupling analysis method that takes the real surface morphology of the gasket contact zone was proposed, and a leakage rate prediction model was established. The results showed that NiTi shape memory effect could enhance the sealing reliability in service and lower the leakage rate. The leakage rate of the NiTi alloy corrugated gasket is positively correlated with the internal pressure of the medium and the roughness of the sealing surface. The prediction model of the NiTi alloy corrugated gasket leakage rate has good reliability with an average error of about 16.81% compared with the simulation.

show abstract

Section: Introductionsupporting

confidence: 66%

Calculation Model of Mechanical and Sealing Properties of NiTi Alloy Corrugated Gaskets under Shape Memory Effect and Hyperelastic Coupling: Two Sealing Properties

Zhu

Liu

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…The pores-forming percolation channels within the seal-contact interface are considered to be a combination of filled tortuous capillaries with their diameter λ satisfying the fractal power law, based on the fractal theory of fluidic transport in porous media developed by Yu [27][28][29][30]. The fractal dimension D f of tortuous capillaries given by the porosity .…”

Section: Leakage Processmentioning

confidence: 99%

An Experimental Study of the Leakage Mechanism in Static Seals

Qiang

Chen

Huang³

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

This paper investigates the fluidic leak rate through sealing contact surfaces by comparison between model calculation and experiment measurement. The focus is on an experimental device designed to measure the leak rate of the static seals with a simpler structure, smaller errors, stronger stability, and more functions. Using the device, experiments were carried out to four test pieces with different surface characteristics, whose leak rates were measured separately. Compared with the calculation results obtained from the fractal surface leak rate prediction model, the correctness and the application range of the model were verified, and the effects of different surface topographies and material properties of the four test pieces on the leak rate were analyzed as well. The experimental device was also used to perform single-factor comparison experiments, which were then combined with the theoretical prediction model to analyze the effects of the sealing surface contact load, fluid pressure, and surface apparent size on the leak rate, so that theoretical support and experimental evidence for selecting the parameters of sealing device was provided.

show abstract

“…Figure 13 is a comparison diagram of gasket leakage rate under two different pretensions. It can be seen that, regardless of the pretension, the gasket leakage rate increases with the increase of medium pressure, and the gap of leakage rate between different pretensions increases with the increase of pressure [20][21][22].…”

Section: Quantitative Prediction Of Leakage Ratementioning

confidence: 96%

Study on Leakage Model of Typical Penetration of Closed Structures Based on Porous Media Seepage Theory

Lin¹,

2022

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Quantitative prediction of penetration leakage rate has not been reported so far. The theoretical prediction method of leakage rate of typical penetration static seal structure of closed structure is studied. Based on porous media seepage mechanics, the relationship between leakage rate and microstructure parameters is established, and a new prediction model of the leakage rate of sealing structures is proposed. Then, the relationship between seal-specific pressure and microstructure parameters is obtained by the Hertz contact mechanics model. Finally, the leakage rate calculation, which is independent of any experimental data, is obtained innovatively. The new model is used to predict the leakage rate of penetration, and the theoretical prediction results are compared with the experimental measurement results. It is proved that the two agree well, which verifies the effectiveness of the model. The prediction model based on this method can well reflect the effects of rough surface morphology, material mechanical properties, sealing load, high temperature, and high pressure on the leakage rate. The leakage rate prediction model proposed in this paper is independent of the experimental regression coefficient and can realize the conversion relationship between different sealing media, sealing materials, and working conditions.

show abstract

A fractal model for gaseous leak rates through contact surfaces under non-isothermal condition

Cited by 28 publications

References 24 publications

Calculation Model of Mechanical and Sealing Properties of NiTi Alloy Corrugated Gaskets under Shape Memory Effect and Hyperelastic Coupling: Two Sealing Properties

Calculation Model of Mechanical and Sealing Properties of NiTi Alloy Corrugated Gaskets under Shape Memory Effect and Hyperelastic Coupling: Two Sealing Properties

An Experimental Study of the Leakage Mechanism in Static Seals

Study on Leakage Model of Typical Penetration of Closed Structures Based on Porous Media Seepage Theory

Contact Info

Product

Resources

About