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Open access Aug 2026

Improved Performance of Waterfall Hydraulic Cross-Flow Turbines with and Without Guide Wall

The improved performance of a waterfall cross-flow hydraulic turbine was investigated through combined experimental and numerical analyses to elucidate the effects of key design parameters, including tip-speed ratio, number of blades, and off-axis distance. Additionally, the influence of a circular guide wall on the pe...

Kobuo Moriya, T. Yamagata, Nobuyuki Fujisawa · 0 citations
Conference Open access Aug 2026

Trade-Off Between Hydraulic Performance and Structural Strength in Blade Thickness Design of High-Head Francis Turbines

Francis turbine runners operated at high head conditions experience severe hydraulic loading and centrifugal stresses, making blade thickness a critical design parameter governing both hydraulic efficiency and structural integrity. Traditionally, blade thickness selection relies on empirical relations, leading to highe...

Madan Ghimire, S. Chitrakar · 0 citations
Open access Sep 2026

SURFACE ROUGHNESS INFLUENCE ON THE HYDRAULIC PERFORMANCE OF AN API 610 BB3 MULTISTAGE CENTRIFUGAL PUMP: AN EXPERIMENTAL–CFD STUDY

Surface roughness affects the hydraulic performance and energy efficiency of API 610 BB3 (between-bearings, axially split, multistage) pumps used in oil, gas, and petrochemical service. We quantify its impact using experiments and computational fluid dynamics (CFD). A four-stage pump was tested at 2900 rpm on a closed-...

S. Güngör, Abdulkerim Okbaz, Z. Yumurtacı · 0 citations
Open access Aug 2026

How Spatial Constraints Govern Aerodynamic Performance of Archimedes Spiral Wind Turbines: A CFD-Based Comparative Analysis

Archimedes Spiral Wind Turbines (ASWTs) are suitable for small-scale urban wind applications, but changing the blade angle can also change the rotor dimensions under different geometric constraints. This study examines these coupled effects by comparing five ASWT configurations with blade angles of 30°, 45°, and 60° un...

Ziyun Zhou, Chen Feng, Jin Liu et al. · 0 citations
Open access Sep 2026

Numerical Investigation of Impeller Leading-edge Profiling on Vortex Suppression and Performance Enhancement in a Pump-as-turbine

Centrifugal pumps operating as turbines (PAT) offer a cost-effective solution for micro-hydro power plants. However, their hydraulic performance is compromised by flow separation at the impeller’s outer diameter. This study conducted a transient numerical analysis to evaluate the hydrodynamic effects of modifying sharp...

Fadhlurrahman, Sutardi · 0 citations
Open access Sep 2026

CFD-Based Performance Assessment of Flanged Diffuser Configurations for a Horizontal-Axis Marine Current Turbine

Marine current turbines can provide predictable renewable power, but their performance at moderate current speeds depends strongly on the flow delivered to the rotor. This study numerically evaluates an open horizontal-axis marine current turbine and two flanged diffuser configurations with short and long expansion sec...

Najdan Waris C.P · 0 citations

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