Flow control in Banki turbines

Popescu, Daniela; Popescu, Constantin; Dragomirescu, Andrei

doi:10.1016/j.egypro.2017.10.272

Cited by 12 publications

(11 citation statements)

References 6 publications

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“…In the results, the efficiencies obtained are a minimum of 58% and a maximum of 86%. e mean efficiency is 75.5% and considering the frequency of the efficiencies at the range of 58.0-68.0% three researchers obtained this efficiency [15,34,35], three researchers obtained 68-78.0% [10], and [29,32] and seven researchers obtained 78 -≥88% [1,12,13,30,31,36]. Moreover, the results show that the highest efficiencies of ≥82 are during use of CFD software and ANSYS CFX code with turbulence model k-ε, SST.…”

Section: 22mentioning

confidence: 94%

“…Various studies [1,9,10,12,13,15,29,32,35,36,38,43] have used CFD for optimizing these parameters in order to influence the improvement of the performance of crossflow turbines. According to the studies, ANSYS CFX software has been highly used to perform simulations and analysis of turbines compared to other CFD software.…”

Section: Analysis Of Nozzle Parametersmentioning

confidence: 99%

“…e internal flow simulation is used to characterize the turbine performance for a different number of blades. Six different turbine runners of 15,20,25,30,35, and 40 blades were investigated, and the study showed that 30-blade runner was the most effective. e prediction results revealed key and exciting details of the structure of the flow in the runner of the crossflow turbine by using the different number of blades.…”

Section: Bladesmentioning

confidence: 99%

See 2 more Smart Citations

A Review on Computational Fluid Dynamics Applications in the Design and Optimization of Crossflow Hydro Turbines

Mrope

Jande

Kivevele

2021

Journal of Renewable Energy

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In recent years, advances in using computational fluid dynamics (CFD) software have greatly increased due to its great potential to save time in the design process compared to experimental testing for data acquisition. Additionally, in real-life tests, a limited number of quantities are measured at a time, while in a CFD analysis all desired quantities can be measured at once, and with a high resolution in space and time. This article reviews the advances made regarding CFD modeling and simulation for the design and optimization of crossflow hydro turbines (CFTs). The performance of these turbines depends on various parameters like the number of blades, tip speed ratio, type of airfoil, blade pitch, chord length and twist, and its distribution along the blade span. Technical aspects of the model design, which include boundary conditions, solution of the governing equations of the water flow through CFTS, and the assumptions made during the simulations are thoroughly described. From the review, a clear idea on the suitability of the accuracy CFD applications in the design and optimization of crossflow hydro turbines has been provided. Therefore, this gives an insight that CFD is a useful and effective tool suitable for the design and optimization of CFTs.

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Section: 22mentioning

confidence: 94%

Section: Analysis Of Nozzle Parametersmentioning

confidence: 99%

Section: Bladesmentioning

confidence: 99%

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A Review on Computational Fluid Dynamics Applications in the Design and Optimization of Crossflow Hydro Turbines

Mrope

Jande

Kivevele

2021

Journal of Renewable Energy

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“…Arellano-Vilchez (2015) conducted a study using CFD techniques, examining the runner's blades behaviour with and without sharp edges, considering also the thickness of the blades, concluding that using sharp blades improves the hydraulic performance of the MBT. Finally, regarding the runner's geometric modificati ons, t he research carried out by Popescu (2017) analyses the low efficiencies of the MBT through CFD caused by the fluid interaction with the runner's shaft and flow recirculation at low rotational regime, determining that, when the runner works without shaft, the efficiency increases 5 %.…”

Section: Instituto Mexicano De Tecnología Del Aguamentioning

confidence: 99%

Numerical validation of a design methodology for cross-flow turbine type Michell-Banki

Galvis-Holguin

Sierra-Del-Rio

Hincapie

et al. 2021

Tecnol. cienc. agua

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The aim of this study is to validate, by means of CFD simulation, the effectiveness of a new design methodology formed of a set of updated equations, which allows the design of each of the MBT components to improve its efficiency. In this study, a rigorous investigation of t he MBT literature was carried out, where the most influential design paramet ers and equations in maximum efficiency were determined. Finally, the design of the MBT is carried out with the most relevant equations found in the literature and the design of the MBT is validated by fluid-dynami c tests. It is concluded that the proposed methodology for the design of the MBT can reach efficiencies up to 83 %, which is satisfactory to s ol ve the lack of complete design methods for the sizing of the different components of the MBT (nozzle, runner and housing), according to the flow conditions of the installation site.

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“…Penelitian dengan mengatur aliran air masuk ke sudu secara eksperimen dan dianalisis dengan software CFD, diperoleh hasil bila putaran rendah effisiensinya rendah. Effisiensi terbaik didapat pada putaran 250 rpm [8]. Dalam uji coba perbandingan terhadap jumlah sudu runner 16, 18 dan 20 terhadap kinerja turbin cross-flow Hasil hitungan jumlah sudu berdasarkan data desain adalah 18 buah, diperoleh untuk jumlah sudu 16 buah effisiensinya 44 % , dan jumlah sudu runner 18 buah sebesar 62 %, sedangkan jumlah sudu 20 sebesar 56 %.…”

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Efek Profil Sudu Turbin Banki terhadap Kekuatan Bahan dan Lintasan Air dalam Runner

Sirojuddin

Ibnawati

Syahri

2021

JRM

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<p class="Abstract">In the Banki turbine, the blade profile needs special attention in its design, so that the high output power can be reached. The design of the blade profile is controlled by the strength of the material and water trajectory from the first and second stages of blades to refrain the water strikes the shaft of the turbine. The aim of this study is to determine the effect of the blade profile on the strength of the material and the trajectory of water in the runner to obtain the best blade profile. The strength limit of the material observed from the value of the safety factor and the flow trajectory could be seen from the flow line of water which should not strike the shaft. The number and width of the blades were obtained based on the water discharge of 2 m2/min with a head equal to 5.5 m. 2D and 3D drawings were created using drawing software. Analysis of water trajectories using CFD simulation and stress analysis using FEM software. They were 3 variants of blade profile, variant PS-1 tapered <span style="text-decoration: line-through;">in</span> at top and bottom, PS-2 tapered at top and square in bottom, PS-3 at the bottom with the radius equal to 10 mm while the tip radius is 0.2 mm, and round tip at the top. From simulation results, it was found that the safety factor is 5.36, 4.31, 3.28, for the PS-1, PS-2, PS-3 respectively. From CFD simulation it is proved that PS-3 flow trajectory did not strike the shaft, while the others still strike the shaft and did not meet the safety factor of 3. The variant PS-3 was the best because the safety factor close to 3 and the flow trajectory did not strike the shaft.</p>

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Flow control in Banki turbines

Cited by 12 publications

References 6 publications

A Review on Computational Fluid Dynamics Applications in the Design and Optimization of Crossflow Hydro Turbines

A Review on Computational Fluid Dynamics Applications in the Design and Optimization of Crossflow Hydro Turbines

Numerical validation of a design methodology for cross-flow turbine type Michell-Banki

Efek Profil Sudu Turbin Banki terhadap Kekuatan Bahan dan Lintasan Air dalam Runner

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