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Gravitational Vortex Water Turbine (GVWT) is one of the water-energy generators with the characteristics of the working area at low head under 3 m and high discharge. This study is conducted on a GVWT turbine using a multistage configuration and aims to determine the performance of the runner in a multi-stage configuration by CFD numerical analysis and experimental. The parameters used to determine the performance are torque, power, and efficiency. The result shows the best distance variation is 1.5D with a torque of 0.477 Nm and an efficiency of 47.3% due to the distance between runners providing space for the vortex to reshape its form through a phenomenon called re-origination. Compared with the experiment, the difference results in efficiency of 4.7% with the best efficiency of 42.6% at 1.5D.

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Effect of Distance on Multistage Runner Gravitational Vortex Water Turbine (GVWT)

  • 会议论文

  • 发表日期：

    2025年

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  • Qori’atul Khasanah,
  • Ridho Hantoro,
  • Erna Septyaningrum,
  • Idham Arya Putra

摘要

Gravitational Vortex Water Turbine (GVWT) is one of the water-energy generators with the characteristics of the working area at low head under 3 m and high discharge. This study is conducted on a GVWT turbine using a multistage configuration and aims to determine the performance of the runner in a multi-stage configuration by CFD numerical analysis and experimental. The parameters used to determine the performance are torque, power, and efficiency. The result shows the best distance variation is 1.5D with a torque of 0.477 Nm and an efficiency of 47.3% due to the distance between runners providing space for the vortex to reshape its form through a phenomenon called re-origination. Compared with the experiment, the difference results in efficiency of 4.7% with the best efficiency of 42.6% at 1.5D.