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<p>This paper presents the effects of clearance, friction coefficient and diameter on the leakage of a balance drum. An experimental pump was set up and the leakage was measured. The experimental results were compared with the leakage predicted by formula suggested by J. F. Gülich. The experimentally measured leakage flow rate was within 4.0 % of the value predicted by the formula of J. F. Gülich. Through computational fluid dynamic analysis using the measured inlet and outlet pressures, the prediction showed an error within 2.6 %. Among the design parameters, clearance had the greatest effect on the leakage flow rate. When the clearance was doubled, the leakage flow rate was increased by about 2.8 times. When a shallow groove structure was applied to the annular seal, the leakage flow rate was decreased by 5 %. When the diameter of the balance drum was increased, there was a negligible change in the leakage.</p>

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Experimental study on balance drum leakage according to the design parameters of centrifugal high-pressure multistage pumps

  • 期刊论文

  • 发表日期：

    2025年10月8日

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  • Jinho Son,
  • Dohong Kim,
  • Boram Kim,
  • Junho Suh

摘要

This paper presents the effects of clearance, friction coefficient and diameter on the leakage of a balance drum. An experimental pump was set up and the leakage was measured. The experimental results were compared with the leakage predicted by formula suggested by J. F. Gülich. The experimentally measured leakage flow rate was within 4.0 % of the value predicted by the formula of J. F. Gülich. Through computational fluid dynamic analysis using the measured inlet and outlet pressures, the prediction showed an error within 2.6 %. Among the design parameters, clearance had the greatest effect on the leakage flow rate. When the clearance was doubled, the leakage flow rate was increased by about 2.8 times. When a shallow groove structure was applied to the annular seal, the leakage flow rate was decreased by 5 %. When the diameter of the balance drum was increased, there was a negligible change in the leakage.