Comparative analysis of the influence of labyrinth seal configuration on leakage behavior

Kim, Tong Seop; Sang, Kyu

doi:10.1007/s12206-009-0733-5

Cited by 75 publications

(55 citation statements)

References 12 publications

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“…It is a dimensionless quantity and is often used to describe the sealing efficiency [7,[16][17][18][19][26][27][28][29]:…”

Section: Discharge Coefficientmentioning

confidence: 99%

“…Suryanarayanan and Morrison [16][17][18] studied the relationship between the flow coefficient and transmission coefficient inside the labyrinth channels in detail, and the influence of the tooth type, compression ratio, clearance, and Reynolds number were obtained. Kim and Cha [19] combined the computational fluid dynamics (CFD) method and a theoretical analysis to discuss the influence of the structural arrangement and pressure ratio on the sealing efficiency and found that a stepped labyrinth seal is more efficient when the labyrinth clearance is larger. Bozzi et al [20] performed a more detailed analysis on the heat transfer in a labyrinth seal.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation on the Effects of Structural Parameters of Labyrinth Cavity on Sealing Performance

Feng

Wang

Yang

et al. 2018

Mathematical Problems in Engineering

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This paper presents a study on the leakage characteristics of a labyrinth piston compressor. A computational fluid dynamics model was applied to predict the effects of different structural parameters of the labyrinth seal on the sealing performance. The velocity field through the sealing clearance and labyrinth cavity was demonstrated and analyzed. An experimental rig was built to validate the simulation model, and the results of the simulation and experimental data showed a good agreement. The effects of the cavity width, cavity depth, tooth thickness, and clearance of the seal on the leakage characteristics were discussed in detail. The results showed that, except for the significant influence of the labyrinth clearance, / (the ratio of cavity depth to labyrinth clearance) should be bigger than 2.7 to achieve the minimum leakage flow, and the effect of the varied cavity width can be ignored. Moreover, when the piston length and cavity width remain constant, the thinner the tooth thickness, the greater the number of labyrinth cavities that can be arranged, and the higher the sealing performance achieved.

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“…It is a dimensionless quantity and is often used to describe the sealing efficiency [7,[16][17][18][19][26][27][28][29]:…”

Section: Discharge Coefficientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effects of Structural Parameters of Labyrinth Cavity on Sealing Performance

Feng

Wang

Yang

et al. 2018

Mathematical Problems in Engineering

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“…However, this structure has an inherent problem of leakage, which deteriorates the volumetric efficiency of the pump seriously [4] . The labyrinth seal featured by noncontacting structure has been widely used in rotating machines for dynamic seal over the years [5][6][7][8] . In marine environment, however, the labyrinth seal shows the benefits of low maintenance and reduced particulate contamination.…”

Section: Introductionmentioning

confidence: 99%

“…For example, straight-through seals [6,8,9] , stepped seals [1,6,10] , honeycomb seals [10][11][12][13] , interlocking seals [1,14,15] have different sealing performance. Furthermore, the structural parameters of cavities also influence the leakage of labyrinth seals, such as cavity width, cavity depth, cavity numbers and clearance size, etc.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on the effect of labyrinth seal configuration on leakage

Zhang

Jia

2017

MATEC Web Conf.

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Abstract. Labyrinth seals have been widely used in rotating machines. In this paper, labyrinth seals with rectangular tooth used in seawater pump with axial flow distribution were studied. The effects of structure parameters of labyrinth seals on sealing performance were numerically studied by the commercial computational fluid dynamics (CFD) software. The sealing length was considered as a constant, while the cavity width, cavity depth, tooth width and pressure ratio were varied. A large number of models were calculated to study the effects of various variables on leakage of labyrinth seals. Firstly, the results show that the effects of the cavity depth on leakage could be ignored compared with that of the cavity width and sealing length. Secondly, the optimal labyrinth seals with lowest leakage can be obtained with the appropriate values of cavity widths. Furthermore, for a certain pressure ratio, the optimal cavity widths resulting in the lowest leakage were demonstrated to be stable irrespective of the values of cavity depth and sealing length. Finally, increasing pressure ratio gives rise to an increase in the optimal cavity width. It reveals that the higher the pressure ratio is, the longer the cavity width is needed to reduce the leakage.

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“…The less is the number of labyrinth seals, the greater is the leakage amount because of the number of steam seal teeth; moreover, the leakage amount increases with an increase in seal tip clearance [10] [11]. On this basis, a researcher pointed out that the leakage coefficient is linear to the sealing tip clearance [12].…”

Section: Introductionmentioning

confidence: 99%

Labyrinth Seal Design Optimization Based on Quadratic Regression Orthogonal Experiment

Cao¹,

Si²,

Li³

et al. 2017

EPE

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The influence of labyrinth seal structure parameters and their interaction on the characteristics of leakage amount are numerically investigated by conducting a quadratic regression orthogonal experiment. To determine the optimal structure parameters of the steam seal for minimizing the leakage amount, a reliable regression equation that does not lack of fit is established. The flow characteristics of the fluid in the labyrinth seal are analyzed in detail. Results show that the leakage amount is greatly influenced by seal cavity depth, convex platform height, seal tooth thickness, and tooth tip clearance, with the tip clearance having the most significant effect. The interaction among the four items exerts a certain impact on the leakage amount. The proposed regression equation exhibits a good significance and does not lack of fit. After optimization, the labyrinth seal demonstrates increased entropy and energy dissipation at the tip of the seal tooth, as well as decreased speed and inertia effect in the cavity, suggesting that the resistance leakage performance of the optimized labyrinth seal is improved.

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Comparative analysis of the influence of labyrinth seal configuration on leakage behavior

Cited by 75 publications

References 12 publications

Numerical Investigation on the Effects of Structural Parameters of Labyrinth Cavity on Sealing Performance

Numerical Investigation on the Effects of Structural Parameters of Labyrinth Cavity on Sealing Performance

Numerical investigation on the effect of labyrinth seal configuration on leakage

Labyrinth Seal Design Optimization Based on Quadratic Regression Orthogonal Experiment

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