Optimizing the Geometric Parameters of a Stepped Labyrinth Seal to Minimize the Discharge Coefficient

Chun, Ye Hwan; Ahn, Jeongmin

doi:10.3390/pr10102019

Cited by 7 publications

(1 citation statement)

References 20 publications

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“…Using experimental and computational results, Zhang et al [22] proposed a correlation equation involving the thickness of the fin tip and the number of fins, FFA, clearance, and pressure ratio in a stepped labyrinth seal, and proposed a correction factor based on the FFA. Chun and Ahn [23] conducted a computational study to investigate the effect of the geometric parameters of a stepped labyrinth seal on the discharge coefficient. Their research underscored that among these parameters, the step height within the stepped labyrinth seal exhibited the highest degree of sensitivity in relation to the discharge coefficient.…”

Section: Introductionmentioning

confidence: 99%

Mass Flow Function Correlation for Solid and Honeycomb Land Labyrinth Seals including Fin Front Angle, Clearance, Fin Number and Honeycomb Geometry

Kim,

Kang,

Kim

et al. 2023

Machines

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In this study, the effects of several geometry factors (fin front angle, clearance, number of fins, and honeycomb cell diameter and depth) on the mass flow function of solid and honeycomb land were studied experimentally. The fin front angle considered in the experiment ranged from 60 to 90 degrees, the number of fins was varied between two and three, and the diameter and depth of the honeycomb cell ranged from 1.33 to 4.00 times and 8.08 to 13.08 times the thickness of the fin tip, respectively. The experimental results showed that the mass flow function decreased as the number of fins increased for the solid land labyrinth seal, and the mass flow function increased as the clearance increased. A fin front angle of 60 degrees was found to have the minimum mass flow function. For the honeycomb land labyrinth seal, the mass flow function decreased as the number of fins increased, and the effect of the cell depth was shown to be insignificant compared to the effect of the cell diameter. The effects of cell diameter and cell depth on the mass flow function depended on the conditions of other variables. In addition, the correlation equations of the mass flow functions of the solid land and honeycomb land labyrinth seals are presented based on the experimental results, which represent the effects of the fin front angle, clearance, pressure ratio, and diameter and depth of the honeycomb cell. The correlation equation for the solid land labyrinth seal had an r2 value of 0.9822, while the correlation equation for honeycomb land had an r2 value of 0.9621.

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Section: Introductionmentioning

confidence: 99%