The effect of nozzle-connector angle on cross-flow turbine performance

Warjito,; Budiarso,; Wijaya, Elang Pramudya; Celine, Kevin; Nasution, Sanjaya Baroar Sakti

doi:10.1063/5.0063477

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The current CFT design is the existing turbine in Fluid Mechanic Laboratories, Department of Mechanical Engineering, Faculty of Engineering Universitas Indonesia, which is the nozzle design methodology reported in a prior study [9,10]. Moreover, the significant design of the currently existing CFT is stated in Table 2.…”

Section: The Current and Modified Cft Designmentioning

confidence: 99%

Preliminary Study on Recirculation Vortex and Turbulence Inside Ultra Low Head Pico Hydro Cross-Flow Turbine using Computational Fluid Dynamics Method

Aji Putro Prakoso,

Warjito,

Budiarso

et al. 2024

ARFMTS

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Cross-flow turbines (CFT) have evolved since the first investigation in 1949. After some use of computational fluid dynamics (CFD) simulations in CFT development, it is known that there might be a recirculation vortex inside the CFT. At the CFT internal flow, some significant turbulent flow occurred, which is indicated by a higher value of turbulence kinetic energy (TKE). However, the effect of the turbulence inside this turbine still evokes many questions. This study ran Several CFD simulations on three CFT blade designs. One of them has already been tested experimentally, and the others are the modifications of the first design. There are two scenarios for the simulations: run in a traditionally two-phase condition or in a submerged state to maximize the usage of the potential head. This study found that the existing configuration has a contra-directional permanent recirculation, dead area, and high turbulency spot, which induce a higher loss. Meanwhile, all those phenomena could be minimized under the modified blade condition. The modification improves multiphase CFT performance by relatively 22.2% efficiency and 16.6% relative escalation for the submerged condition. However, the expected recirculation flow found in the prior study was still not found in this study. Another modification is still needed.

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Section: The Current and Modified Cft Designmentioning

confidence: 99%

Preliminary Study on Recirculation Vortex and Turbulence Inside Ultra Low Head Pico Hydro Cross-Flow Turbine using Computational Fluid Dynamics Method

Aji Putro Prakoso,

Warjito,

Budiarso

et al. 2024

ARFMTS

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“…In some areas, the existence of electricity is still something of a luxury, such as in the Yapen Islands, Papua, Fatoi Village, Insana District, Central-North Timor Regency, East Nusa Tenggara, and other villages [3,4]. In general, electricity is used for lighting, communication, information dissemination, and increasing (small) business productivity.…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of Straight, Curved, and Tilted Blades of Pico Scaled Vortex Turbine

Warjito

Ramadhan

Budiarso

et al. 2023

CFDL

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In the 26th Conference of the Parties (COP26), United Nations Framework Convention is committed to suppressing the acceleration of climate change due to carbon by applying energy from fossil fuels to New Renewable Energy (NRE). Indonesia targets that in 2060 the coal phase-out will be replaced by renewable energy 2056. As a tropical country with many rivers and many lakes, Indonesia has a water energy potential of 75,000 MW. In some remote areas, the need for electrical power is pico scaled (< 5kW). The vortex turbine was chosen to be suitable for river flow with low water levels, low maintenance and construction costs, as well as being environmentally friendly for the underwater ecosystem. This study aims to compare the performance of the vortex to the differences in the shape of the pico scale blade. This study was carried out with variations in the shape of the straight, tilted, and curved blades. Based on the results of all vortex turbine studies, it can be ascertained that the best blade shape obtained numerically is an inclined blade with a hydraulic efficiency of 36%.

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The effect of nozzle-connector angle on cross-flow turbine performance

Cited by 2 publications

References 9 publications

Preliminary Study on Recirculation Vortex and Turbulence Inside Ultra Low Head Pico Hydro Cross-Flow Turbine using Computational Fluid Dynamics Method

Preliminary Study on Recirculation Vortex and Turbulence Inside Ultra Low Head Pico Hydro Cross-Flow Turbine using Computational Fluid Dynamics Method

Performance Comparison of Straight, Curved, and Tilted Blades of Pico Scaled Vortex Turbine

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