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Numerical Investigation of a Low-Head Savonius Turbine for Sustainable Energy Extraction from a Small River in Southeast Asia: Case Study of Gending River, Indonesia

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Abstract:

Population growth and technological developments have led to an increase in energy demand, especially electricity, which is a primary need for communities. One effort to meet this demand is through the use of renewable energy, such as micro-hydro power plants (PLTMH) using Savonius-type hydrokinetic turbines. This study analyses the effect of Phase-Shaft Angle (PSA) design variations on the performance of a 2-stage Savonius turbine in the Gending River flow. Simulations were conducted using the Computational Fluid Dynamics (CFD) method with the k-ω SST turbulence model under steady-state conditions, with PSA variations of 15°, 30°, and 45°, a Tip Speed Ratio (TSR) of 0.8, and a flow velocity of 1.07 m/s. The results showed that a PSA of 45° provided the best performance with a torque of 3.44705 Nm, a torque coefficient (CT) of 0.235, and a power coefficient (CP) of 0.188. Conversely, the 15° PSA produced the lowest performance with a torque of 2.88019 Nm, a CT of 0.196, and a CP of 0.157.

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Periodical:

Engineering Headway (Volume 38)

Pages:

211-225

DOI:

https://doi.org/10.4028/p-ESm5u8

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Online since:

June 2026

Authors:

Fuad Hilmy, Raka Mahendra Sulistiyo*, Muhammad Khusni Mubarak, Agus Arianto, Arrizka Yanuar Adipradana, Dinh Cong Binh

Keywords:

CFD, Fluid Dynamics, Gending River, Numerical Method, Savonius Turbine

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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