A review of commercial numerical modelling approaches for axial hydrokinetic turbine wake analysis in channel flow

Niebuhr, Chantel Monica; Schmidt, Steffen J.; Dijk, Marco Van; Smith, Lelanie; Neary, Vincent S.

doi:10.1016/j.rser.2022.112151

Cited by 12 publications

(10 citation statements)

References 104 publications

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“…Various authors [38,39] have used this method to analyse the flow field of turbines arranged in arrays-specifically for tidal turbine optimization. A study analysing the accuracy of RANS approaches revealed good correlation with the experimental data found when using a Reynolds stress turbulence model (RSM) coupled with a BEM blade modelling technique (RSM-BEM) [40]. The study also highlights the importance of using an RSM rather than standard eddy viscosity models, due to the strong anisotropic flow in the wake.…”

Section: Validation Of Cfd Modelsmentioning

confidence: 75%

“…Additionally, two three-bladed turbine models with experimental results found in the literature [41] and tested on site [1] were modelled as specified in [40], for further measurements and validation of the backwater calculation methods. Where possible, BEM-VD (virtual disk) models were used to reduce the computational expense required.…”

Section: Cfd Modelsmentioning

confidence: 99%

“…The experimental results [42] provide high-resolution wake measurements of the near-and far-wake flow field surrounding the turbine from −5 to 10 d t . These were used previously to validate the CFD procedure for a single-phase analysis [40]. Although the velocity profiles and performance metrics were adequately modelled with both the single-phase and multiphase models, correct approximation of the backwater effect through the multiphase modelling required validation.…”

Section: Rm1 Model Validationmentioning

confidence: 99%

“…The laboratory test turbulence and velocity values that were measured experimentally were specified at the inlet. Full development of the boundary layer on all surfaces (i.e., boundary walls, blades, and stanchion) was ensured through the specific turbulence model wall treatment and mesh resolution for each test case (details seen in [40]).…”

Section: Rm1 Model Validationmentioning

confidence: 99%

“…Simulation of the air-water interface (multiphase flow) may be approached in various ways. A multiphase analysis ensures a robust approach, but demands a higher computational load; therefore, a symmetry boundary condition is often used in a single-phase model [40].…”

Section: Rm1 Model Validationmentioning

confidence: 99%

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Development of a Hydrokinetic Turbine Backwater Prediction Model for Inland Flow through Validated CFD Models

et al. 2022

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Hydrokinetic turbine deployment in inland water reticulation systems such as irrigation canals has potential for future renewable energy development. Although research and development analysing the hydrodynamic effects of these turbines in tidal applications has been carried out, inland canal system applications with spatial constraints leading to possible blockage and backwater effects resulting from turbine deployment have not been considered. Some attempts have been made to develop backwater models, but these were site-specific and performed under constant operational conditions. Therefore, the aim of this work was to develop a generic and simplified method for calculating the backwater effect of HK turbines in inland systems. An analytical backwater approximation based on assumptions of performance metrics and inflow conditions was tested using validated computational fluid dynamics (CFD) models. For detailed prediction of the turbine effect on the flow field, CFD models based on Reynolds-averaged Navier–Stokes equations with Reynolds stress closure models were employed. Additionally, a multiphase model was validated through experimental results to capture the water surface profile and backwater effect with reasonable accuracy. The developed analytical backwater model showed good correlation with the experimental results. The model’s energy-based approach provides a simplified tool that is easily incorporated into simple backwater approximations, while also allowing the inclusion of retaining structures as additional blockages. The model utilizes only the flow velocity and the thrust coefficient, providing a useful tool for first-order analysis of the backwater from the deployment of inland turbine systems.

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Section: Validation Of Cfd Modelsmentioning

confidence: 75%