A review on computational fluid dynamics modeling and simulation of horizontal axis hydrokinetic turbines

Laı́n, Santiago; Contreras, L.; López, Omar D.

doi:10.1007/s40430-019-1877-6

Cited by 20 publications

(12 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In order to avoid cavitation inception, negative minimum pressure coefficient, K p,min should be less than or equal to cavitation number [40], σ, defined as follows:…”

Section: Rotor Designmentioning

confidence: 99%

Investigation of the Possibilities to Improve Hydrodynamic Performances of Micro-Hydrokinetic Turbines

Barbarić

Guzović

2020

Energies

View full text Add to dashboard Cite

Horizontal axis turbines are commonly used for harnessing renewable hydrokinetic energy, contained in marine and river currents. In order to encourage the expansion of electricity generation using micro-hydrokinetic turbines, several design improvements are investigated. Firstly, optimization-based design of rotor blade is used to get as close as possible to the efficiency limit of 59.3% (known as Betz limit), that counts for bare turbine rotors, placed in the free flow. Additional diffuser elements are further added to examine the potential to overcome the theoretical efficiency limit by accelerating water at the axial direction. Various diffuser geometrical configurations are investigated using the computational fluid dynamics (CFD) to obtain insight into hydrodynamics of augmented micro-hydrokinetic turbines. Moreover, the turbines are compared from the energy conversion efficiency point of view. The highest maximum power coefficient increase of 81% is obtained with brimmed (flanged) diffuser. Diffusers with foil-shaped cross-sections have also been analyzed but power augmentation is not significantly greater than in the case of simple cross-section designs of the same dimensions. The power coefficients’ comparison indicate that considerable power augmentation is achievable using brimmed diffuser with higher value of length-to-diameter ratio. However, the impact of diffuser length increase on the power coefficient enhancement becomes weaker as the length-to-diameter ratio reaches a value of 1.

show abstract

“…In order to avoid cavitation inception, negative minimum pressure coefficient, K p,min should be less than or equal to cavitation number [40], σ, defined as follows:…”

Section: Rotor Designmentioning

confidence: 99%

Investigation of the Possibilities to Improve Hydrodynamic Performances of Micro-Hydrokinetic Turbines

Barbarić

Guzović

2020

Energies

View full text Add to dashboard Cite

show abstract

“…3. For each part, there is a blade element, for which the stresses imposed by the flow are calculated, by applying the principles of momentum conservation and aerodynamics [5].…”

Section: Blade Element Theorymentioning

confidence: 99%

“…Thus, there is a need to develop other forms of energy generation which have low environmental impact, such as hydrokinetic energy (energy from water streams). As stated in [2][3][4][5][6], hydrokinetic technology offers several advantages over traditional forms of hydraulic generation, for example, the possibility of not using dams.…”

Section: Introductionmentioning

confidence: 99%

Fatigue life estimation of hydrokinetic turbine blades

Filho

Santana

Vaz

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

Fatigue analysis of hydrokinetic blades is essential as they are subjected to dynamic loads during their operation. This makes fatigue life estimation very important during turbine design. Therefore, this work investigates fatigue life of hydrokinetic turbine blades placed downstream of a hydroelectric power plant. The adopted methodology requires that variations in velocity, load, and stress need to be well established. Historical data of the river at the site are used as reference for variation in flow velocity. The blade element theory is implemented to calculate loads, while stresses are estimated from a finite element model. The S-N method, the rainflow count, and the Palmgren-Miner rule are used to calculate fatigue. This whole process is facilitated by the creation of computational tools to automate different steps. As a result, a life of approximately 20 years is predicted for the blade, neglecting the turbulence that occurs in the speed of the river. When considering a turbulence of 5%, the estimation is reduced to 17 years, indicating a reduction of 15% in life. The complete codes can be downloaded from https ://githu b.com/engse rgioc ustod io/fatig uebla des.

show abstract

“…CFD modelling and simulation of hydraulic turbomachines has been the objective of review articles such as in Sick and Wilson [45], Keck and Sick [46], or Trivedi et al [47]. A particular focus was put on horizontal axis turbines by Laín et al [48], while the state of the art in CFD modelling of Pelton turbines was discussed by Židonis and Aggidis [49]. Both steady-state and transient simulation of hydraulic turbines are widely carried out, where steady-state conditions include the calculation of the best efficiency point, high load, and part load conditions.…”

Section: Hydraulic/water Turbinesmentioning

confidence: 99%

CFD Applications in Energy Engineering Research and Simulation: An Introduction to Published Reviews

Iranzo

2019

Processes

View full text Add to dashboard Cite

Computational Fluid Dynamics (CFD) has been firmly established as a fundamental discipline to advancing research on energy engineering. The major progresses achieved during the last two decades both on software modelling capabilities and hardware computing power have resulted in considerable and widespread CFD interest among scientist and engineers. Numerical modelling and simulation developments are increasingly contributing to the current state of the art in many energy engineering aspects, such as power generation, combustion, wind energy, concentrated solar power, hydro power, gas and steam turbines, fuel cells, and many others. This review intends to provide an overview of the CFD applications in energy and thermal engineering, as a presentation and background for the Special Issue “CFD Applications in Energy Engineering Research and Simulation” published by Processes in 2020. A brief introduction to the most significant reviews that have been published on the particular topics is provided. The objective is to provide an overview of the CFD applications in energy and thermal engineering, highlighting the review papers published on the different topics, so that readers can refer to the different review papers for a thorough revision of the state of the art and contributions into the particular field of interest.

show abstract

A review on computational fluid dynamics modeling and simulation of horizontal axis hydrokinetic turbines

Cited by 20 publications

References 79 publications

Investigation of the Possibilities to Improve Hydrodynamic Performances of Micro-Hydrokinetic Turbines

Investigation of the Possibilities to Improve Hydrodynamic Performances of Micro-Hydrokinetic Turbines

Fatigue life estimation of hydrokinetic turbine blades

CFD Applications in Energy Engineering Research and Simulation: An Introduction to Published Reviews

Contact Info

Product

Resources

About