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Fluid passing through penstock undergoes several types of flow losses including frictional and bend losses. In addition to this, a misalignment in penstock also contributes to total flow or pressure loss. Further, the possibility of material damage due to fatigue failure is also induced by the penstock misalignment. In this study effect of several penstock misalignments (0, 2, 4, and 6 mm) on pressure loss is numerically investigated using ANSYS Fluent software. Further, the region of stress concentration is obtained through fluid-structure interaction (FSI). The pressure loss in penstock with 6 mm misalignment is 1.3 times that of the pressure loss in perfectly aligned penstock. The paper suggests proper inspection of penstock misalignment in regular time intervals for the effective operation of hydropower plants.

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Penstock Misalignment Inducing Pressure Loss and Stress Concentration

  • 会议论文

  • 发表日期：

    2025年

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  • Navam Shrivastava,
  • Anant Kumar Rai

摘要

Fluid passing through penstock undergoes several types of flow losses including frictional and bend losses. In addition to this, a misalignment in penstock also contributes to total flow or pressure loss. Further, the possibility of material damage due to fatigue failure is also induced by the penstock misalignment. In this study effect of several penstock misalignments (0, 2, 4, and 6 mm) on pressure loss is numerically investigated using ANSYS Fluent software. Further, the region of stress concentration is obtained through fluid-structure interaction (FSI). The pressure loss in penstock with 6 mm misalignment is 1.3 times that of the pressure loss in perfectly aligned penstock. The paper suggests proper inspection of penstock misalignment in regular time intervals for the effective operation of hydropower plants.