Inter-Stage Pressure Drop of Multi-Stage Brush Seal With Differentiated Structure

Zhao, Huan; Li, YeLong; Sun, Daofeng; Liu, Yu; Wen, Shuaifang; Sun, Jun

doi:10.1115/1.4056793

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…The tube bank model assumes that the air travels through the closely arranged staggered-array tube bank, and two sub-models are included: 2-dimensional and 3-dimensional tube bank models. The 2-dimensional model cannot reflect the anisotropic flow in the bristle pack [10], and a 3-dimensional model [11] is too complex for establishing a model and solving computational convergence. The bristles closely resemble a random arrangement, and the tube bank model has limitations.…”

Section: Introductionmentioning

confidence: 99%

Temperature Field and Performance Analysis of Brush Seals Based on FEA-CFD and the Porous Medium of Anisotropic Heat Transfer Models

Song,

Liu,

Sun

et al. 2023

Energies

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A brush seal is a type of contact sealing technology that generates a great amount of heat during operations. The heat can affect the seal’s performance and lifespan. To study the brush seals’ temperature distribution, a new model considering the anisotropic heat transfer effect is established in this paper. The friction heat effect at the bristles’ tip is studied. The temperature field and leakage rates are obtained by using combined finite element analysis (FEA)-computational fluid dynamics (CFD) analysis and the anisotropic heat transfer theory. The influence of operating and structural parameters on the temperature field and the sealing properties of the brush seal are investigated. It is shown that the value of the rotation rate and the interference can cause the temperature of the brush seal to increase. The pressure difference enhances the convective heat transfer from the brush seals. While the temperature at the bristles’ tip increases, the radial average temperature of the bristles decreases significantly. In the case of a small pressure difference, the fence’s height can increase the windward area, leading to stiff bristles and resulting in a temperature increase at the bristles’ tip; however, the effective flow area increases, resulting in an acceleration of the radial temperature’s decrease. To summarize, the porous medium model of anisotropic heat transfer provides a new method for studying brush seals, and it can reflect the temperature distribution and leakage performance of brush seals.

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Section: Introductionmentioning

confidence: 99%

Temperature Field and Performance Analysis of Brush Seals Based on FEA-CFD and the Porous Medium of Anisotropic Heat Transfer Models

Song,

Liu,

Sun

et al. 2023

Energies

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Influence factors of frictional heat between bristles and rotor for a multi-stage brush seal

Sun,

Yang,

Zhao

et al. 2024

Tribology International

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Numerical and Experimental Study on the Influence of Honeycomb Bushing Wear on the Leakage Flow Characteristics of Labyrinth Seal

Xu,

Wang,

Sun

et al. 2024

Journal of Engineering for Gas Turbines and Power

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Honeycomb bushing wear has a significant effect on the leakage characteristics of the labyrinth seal. In this paper, four kinds of honeycomb bushing labyrinth seals were designed and processed. The leakage characteristics of honeycomb bushing labyrinth seal were studied experimentally under different inlet and outlet pressure ratios and sealing clearance conditions. At the same time, the numerical model of honeycomb bushing labyrinth seals were established, and the influence of honeycomb bushing wear on the flow field characteristics of labyrinth seals was analyzed by numerical simulation. The existing leakage formula was modified by the correction coefficient method. The results show that the leakage of four kinds of honeycomb bushing labyrinth seals increases with the increase of pressure ratio and sealing clearance, and the sealing effect of unworn honeycomb bushing labyrinth seal is the best. With the increase in wear depth, the leakage of the honeycomb bushing labyrinth seal increases, and the maximum leakage can be increased by 59.59 %. The wear groove weakens the throttling effect of the labyrinth, causing the leakage of the seal to increase. The increase of the depth of the wear groove changes the flow area and the direction of the jet, so that the leakage increases slightly. The theoretical formula of leakage is corrected by the correction coefficient method. The value calculated by the corrected theoretical formula of leakage is in good agreement with the experiment, and the error is within 5%. It meets the practical application of the project.

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Inter-Stage Pressure Drop of Multi-Stage Brush Seal With Differentiated Structure

Cited by 3 publications

References 8 publications

Temperature Field and Performance Analysis of Brush Seals Based on FEA-CFD and the Porous Medium of Anisotropic Heat Transfer Models

Temperature Field and Performance Analysis of Brush Seals Based on FEA-CFD and the Porous Medium of Anisotropic Heat Transfer Models

Influence factors of frictional heat between bristles and rotor for a multi-stage brush seal

Numerical and Experimental Study on the Influence of Honeycomb Bushing Wear on the Leakage Flow Characteristics of Labyrinth Seal

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