History of Utilization of the Computational Fluid Dynamics Method for Study Pico Hydro Type Cross-Flow

Adanta, Dendy; Sari, Dewi Puspita; Muhammad, Nura Mu’az; Prakoso, Aji Putro

doi:10.51630/ijes.v2i1.11

Cited by 10 publications

(4 citation statements)

References 21 publications

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“…( 1), the nozzle inlet ratio for 𝜆 = 𝜋 2 ⁄ estimated at 0.2942, while the 𝑑 𝐶 value in this study varies from 0.0625 to 0.3125 with a 0.0625 increment. The prior study found that the water's velocity distribution approaching the turbine affects the turbine's performance [16]. On the other hand, the OCF velocity distribution is different from the in-nozzle velocity distribution and the inviscid approach.…”

Section: Cfd Simulations Casesmentioning

confidence: 99%

“…However, based on two prior studies, the no-hydraulic-jump assumption was not valid, especially at higher rotational speeds. The hydraulic jump was formed due to the centrifugal force effects found in CFT since 1960 [15]. In a nozzle-equipped CFT, the centrifugal force effect generates the nozzle velocity coefficient investigated in a prior study and is valued between 0.9 and 1 [14].…”

Section: Cfd Simulations Casesmentioning

confidence: 99%

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Effect of Cross-Sectional Depth on Horizontal and 30° Slop Spillway Open Channel Pico Hydro Cross-Flow Turbine Efficiency

Aji Putro Prakoso,

Budiarso,

Warjito

et al. 2024

ARFMTS

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Harvesting the kinetic energy from the small dam’s spillway downstream flow in agricultural areas is interesting. On the other hand, a cross-flow turbine (CFT) is a unique impulse turbine because it works at a higher specific speed, which means this turbine works at a lower head and higher water flow rate. Thus, there is an opportunity to use a CFT to harvest the energy in the spillway. There are two possible scenarios: at the flat horizontal and the 30° slop flow. Several computational fluid dynamics (CFD) simulations were conducted to test the hypothesis. The simulations were performed with five variations of the ratio between the cross-sectional depth parameter of the spillway’s flow before approaching the turbine for each scenario. The total head in the present study case is 3.0 meters with 120 l/s of water discharge. The simulations used ANSYS® Fluent™ for 2D CFD simulation. The tests found that the CFT could attain 80.36% efficiency. Moreover, some water flows over the turbine at a higher rotational speed, leading to a significant loss in turbine performance, called potential loss. This finding indicates that the CFT could harvest the spillway’s flow kinetic energy when the flow is not too deep.

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Section: Cfd Simulations Casesmentioning

confidence: 99%

Section: Cfd Simulations Casesmentioning

confidence: 99%

Effect of Cross-Sectional Depth on Horizontal and 30° Slop Spillway Open Channel Pico Hydro Cross-Flow Turbine Efficiency

Aji Putro Prakoso,

Budiarso,

Warjito

et al. 2024

ARFMTS

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“…1 Iss. 1 July 2023, pp: 10-19 turbines [11]. That means CFT uses more water discharge and needs a lower hydraulic head than other impulse turbines [12].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on NACA-9405, NACA-9503 and NACA-9506 Airfoil Profiled Blade Open-Channel Flow Cross-Flow Turbine

Prakoso,

Piseno,

Bisono

et al. 2023

PREDATECS

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Several agricultural areas in Indonesia are classified as underdeveloped rural areas, and challenging to acquire electricity from the primary grid. On the other hand, some pico hydropower potentials can be found in agriculture, especially at the irrigation dam spillway flows. However, no such technology can convert the energy inside the water open-channel flow through dam spillways into electricity. Crossflow turbines (CFT) are expected to utilize dam spillways’ power due to their ability to convert the kinetic energy of water. Prior studies found that airfoil profile could slightly increase CFT efficiency and affect the interaction between water and turbine. Using planar two-dimensional computational fluid dynamics (CFD) numerical simulation analysis, the current study investigated the energy conversion phenomenon inside different open-channel CFT blade profiles. This study simulates CFT working at 3 meters of total head and 0.04 m3/s of water discharge put into the dam spillway’s downstream. The turbine blade profiled with the National Advisory Committee of Aeronautics (NACA) standard airfoil numbered 9405, 9503, and 9506 are being compared and investigated in the present study. CFD numerical analysis results show that the forward direction NACA airfoil profiled blades deliver better efficiency than the reversed one. These findings contradict the prior study’s results which tested airfoil profiled CFT working as usual with nozzle. This phenomenon indicated differences in the energy transfer process between open channel CFT and the ordinary CFT with a nozzle. Furthermore, current work finds that forward NACA-9503 CFT has a higher efficiency than other tested airfoil profiles, with 57.05% efficiency. In addition, the present study finds that the NACA-95XX airfoil has a more suitable chamber curve with the original CFT blade’s curve than the NACA-94XX airfoil by velocity triangle analysis. Then, the NACA-9503 profile is thinner than the NACA-9506 profile, which eases water flowing through the turbine blades.

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“…For this reason, carrying out studies to optimize the geometry of these turbines is of utmost importance to achieve greater efficiency and, therefore, a higher performance in the energy production process. In the field related to turbine simulation, it is possible to identify in the literature that in turbo-machinery, the six degrees of freedom (6-DoF) user-defined function (UDF) method has been commonly used to analyze systems as cross-flow turbines [8,9,10,11], water wheel turbines [12] and open flume turbines [13]. The 6-DoF approach has not been thoroughly investigated in hydrokinetic turbine rotor modeling.…”

Section: Introductionmentioning

confidence: 99%

Performance of an Archimedes screw turbine with spiral configuration for hydrokinetic applications

Montilla-López

Velásquez

Betancour

et al. 2022

Rev.Fac.Ing.Univ.Antioquia

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The performance of an Archimedes spiral turbine (AST) for hydrokinetic applications was examined using a three-dimensional unsteady numerical model utilizing the six degrees of freedom (6-DOF) solver that is available in ANSYs Fluent software. From the computational fluid dynamics (CFD) simulations, the power coefficient (Cp) curve was estimated. This curve was compared with the curve of an Archimedes screw hydrokinetic turbine (ASHT) reported in the literature. The ASHT was found to be more efficient than the AST for electricity generation. The highest value of Cp for the AST was 0.337, which is a relatively high value in comparison with that of other types of hydrokinetic turbines. The results calculated from the CFD for the AST were compared with an experimental study reported for wind applications.

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History of Utilization of the Computational Fluid Dynamics Method for Study Pico Hydro Type Cross-Flow

Cited by 10 publications

References 21 publications

Effect of Cross-Sectional Depth on Horizontal and 30° Slop Spillway Open Channel Pico Hydro Cross-Flow Turbine Efficiency

Effect of Cross-Sectional Depth on Horizontal and 30° Slop Spillway Open Channel Pico Hydro Cross-Flow Turbine Efficiency

Comparative Study on NACA-9405, NACA-9503 and NACA-9506 Airfoil Profiled Blade Open-Channel Flow Cross-Flow Turbine

Performance of an Archimedes screw turbine with spiral configuration for hydrokinetic applications

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