Journal ArticleDOI
Improvement in Savonius Wind Turbines Efficiency by Modification of Blade Designs—A Numerical Study
Reads0
Chats0
TLDR
The study indicates that the blade design presented here has a potential to increase the power efficiency of a Savonius wind turbine by 10–28%, which is a significant improvement in power efficiency.Abstract:
Savonius wind turbines are special class of vertical axis wind turbines (VAWTs). These are low-cost drag-driven turbines and are known to be inefficient. It is proposed in this study that a simple modification to the turbine blade design can yield a significant improvement in power efficiency. The performance of the new design is extensively studied on openfoam-v1812, a popular open source computational fluid dynamics (CFD) library. The flow equations coupled with equations of rotation of the turbine are solved on an overset mesh framework. This study also serves as a validation of recently released overset support in openfoam. The turbulence is incorporated by coupling Reynolds-averaged Navier–Stokes (RANS) with shear stress transport (SST) κ − ω eddy viscosity turbulence model. The turbulence parameters are set to produce a flow with the Reynolds number, Re = 4.8 × 105. To have better confidence in simulations, this study also presents a comparison of numerical flow over conventional Savonius turbine designs with the published data. It is observed that a majority of CFD analysis on wind turbine designs are performed for the fixed tip speed ratio on a traditional static mesh structure. But, in this CFD study, a wind-driven rotation of Savonius turbine is simulated on an overset dynamics approach. The results of the study are compared and discussed based on the predicted moment and power coefficients, pressure variation on the blades, flow velocity field, and wake analysis. The study indicates that the blade design presented here has a potential to increase the power efficiency of a Savonius wind turbine by 10–28%.read more
Citations
More filters
Journal ArticleDOI
Investigation of synergy and inhibition effects during co-gasification of tire char and biomass in CO2 environment
TL;DR: In this article, the authors investigated the synergistic/antagonistic effects during the co-gasification of tire char (TC), as a low-quality sideproduct of scrap tire pyrolysis and rambutan peel (RP).
Journal ArticleDOI
Validating the ideal configuration and mutual coupling effect among Savonius wind turbine clusters using free rotation analysis
TL;DR: In this article , the authors analyzed the flow-driven characterization of wind turbine clusters using a modified wind turbine in order to forecast the positive couple effect and enhanced power coefficient, and the 2D numerical study is modeled using open source CFD toolbox OpenFOAM-v1812 with unsteady RANS solver overPimpleDyMFoam adopting dynamic overset mesh approach.
Book ChapterDOI
Positioning of Wind Turbine in a Wind Farm for Optimum Generation of Power Using Genetic Algorithm for Multiple Direction
Khalid Anwar,Sandip Deshmukh +1 more
TL;DR: In this article, a program based on genetic algorithm for positioning turbines in a wind farm and studies the effect of wind direction on WFLO is proposed, the best solution would accommodate 19 turbines which can generate an average power of 183.55 MW with maximum 343.15 MW in November and a minimum 29.8 MW in May.
Journal ArticleDOI
A Numerical study toward harvesting power from train slipstream using savonius rotor
TL;DR: In this paper, a computer-oriented fluid-solid integrate simulation of wind turbine propelled by train-induced wind is performed by executing all physically realistic boundary conditions, and the results were validated against benchmark experimental study.
Journal ArticleDOI
Optimization of Savonius wind turbine blades based on perturbed stochastic fractal search algorithm and Kriging surrogate model
Song Zhang,Shuhui Xu +1 more
TL;DR: In this paper , the shape of the blades of a wind turbine is described parametrically using the cubic Bezier curve and then a certain number of design schemes in the design space are obtained using the Latin hypercube sampling technique, and the torque coefficients of these design schemes are evaluated using CFD simulation.
References
More filters
Book
Numerical heat transfer and fluid flow
TL;DR: In this article, the authors focus on heat and mass transfer, fluid flow, chemical reaction, and other related processes that occur in engineering equipment, the natural environment, and living organisms.
Book
Turbulence modeling for CFD
TL;DR: In this paper, the authors proposed a compressible ecoulement for compressible ECCs, based on the disquette reference record created on 2005-11-18, modified on 2016-08-08.
Journal ArticleDOI
Gmsh: A 3-D finite element mesh generator with built-in pre- and post-processing facilities
TL;DR: Gmsh as mentioned in this paper is an open-source 3D finite element grid generator with a build-in CAD engine and post-processor that provides a fast, light and user-friendly meshing tool with parametric input and advanced visualization capabilities.
BookDOI
Wind energy explained : theory, design, and application
TL;DR: In this article, a simplified HAWT rotor performance calculation procedure was proposed to evaluate the effect of drag and blade number on the optimum performance of wind turbine rotor performance, considering the Betz limit and the ideal horizontal axis wind turbine with wake rotation.
Book
On the partial difference equations of mathematical physics
TL;DR: In this paper, a discussion of the behavior of the solution as the mesh width tends to zero is presented, and the applicability of the method to more general difference equations and to those with arbitrarily many independent variables is made clear.