scholarly journals EFFECT OF SMART STRUCTURES ON AERODYNAMIC PERFORMANCE OF HORIZONTAL AXIS WIND TURBINE

2021 ◽  
Vol 5 (11) ◽  
Author(s):  
Hira Syed ◽  
Dr.Gulraiz Ahmed
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Stokes Equations ◽  
Smart Structures ◽  
Turbine Blades ◽  
Cost Effective ◽  
Aerodynamic Performance ◽  
Horizontal Axis Wind Turbine ◽  
Aerodynamic Analysis ◽  
Cord Length

In renewable energy the wind energy is the most significant source. The wind turbine suppresses the kinetic energy of the wind. Current research focuses on improving the aerodynamic performance of wind turbine blades through wind tunnel tests and theoretical studies. These exercises are time taking and require considerable laboratory resources. Similarly, simulation of wind turbines using CFD software (Computational Fluid Dynamics) provides cost-effective solutions for aerodynamic analysis of the blades. Due to the energy crisis in Pakistan, we need a solution to overcome the power shortage. Wind energy is an economical and affordable energy. In this study, two-dimensional airfoil S4310, was selected for the blade cross section. 2.1 m cord length from root and 0.67 m cord length from tip of the blade, aerodynamic analysis of this model was performed using ANSYS-FLUENT software. Using the turbulence model, the lift and drag coefficients were computed for wind-turbine blade at 0?-14? angles of attack (AOA). The CFD results accomplish by all together solving momentum ,continuity and the Navier-Stokes equations using a standard non-linear solver. The smart structures were also applied on the wing in which active twist was applied to the blade using twist angles from 0?-10? and similarly the lift to drag ratio were considered.

scholarly journals COMPUTATIONAL FLUID DYNAMICS STUDY OF DUSTY AIR FLOW OVER NACA 63415 AIRFOIL FOR WIND TURBINE APPLICATIONS

2017 ◽  
Vol 79 (7-3) ◽  
Author(s):  
Iham F. Zidane ◽  
Khalid M. Saqr ◽  
Greg Swadener ◽  
Xianghong Ma ◽  
Mohamed F. Shehadeh
Keyword(s):  
Numerical Simulation ◽  
Wind Turbine ◽  
South African ◽  
Stokes Equations ◽  
Lift Coefficient ◽  
Turbine Blades ◽  
Aerodynamic Performance ◽  
Accurate Estimation ◽  
African Countries ◽  
Sand Particles

Gulf and South African countries have enormous potential for wind energy. However, the emergence of sand storms in this region postulates performance and reliability challenges on wind turbines. This study investigates the effects of debris flow on wind turbine blade performance. In this paper, two-dimensional incompressible Navier-Stokes equations and the transition SST turbulence model are used to analyze the aerodynamic performance of NACA 63415 airfoil under clean and sandy conditions. The numerical simulation of the airfoil under clean surface condition is performed at Reynolds number 460×103, and the numerical results have a good consistency with the experimental data. The Discrete Phase Model has been used to investigate the role sand particles play in the aerodynamic performance degradation. The pressure and lift coefficients of the airfoil have been computed under different sand particles flow rates. The performance of the airfoil under different angle of attacks has been studied. Results showed that the blade lift coefficient can deteriorate by 28% in conditions relevant to the Gulf and South African countries sand storms. As a result, the numerical simulation method has been verified to be economically available for accurate estimation of the sand particles effect on the wind turbine blades.

scholarly journals Design Optimization of a Multi-Megawatt Wind Turbine Blade with the NPU-MWA Airfoil Family

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3330 ◽  
Author(s):  
Jianhua Xu ◽  
Zhonghua Han ◽  
Xiaochao Yan ◽  
Wenping Song
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Weight Reduction ◽  
Stokes Equations ◽  
Lift Coefficient ◽  
Turbine Blades ◽  
Aerodynamic Performance ◽  
Wind Turbine Blade ◽  
Structural Performance ◽  
Power Coefficient

A new airfoil family, called NPU-MWA (Northwestern Polytechnical University Multi-megawatt Wind-turbine A-series) airfoils, was designed to improve both aerodynamic and structural performance, with the outboard airfoils being designed at high design lift coefficient and high Reynolds number, and the inboard airfoils being designed as flat-back airfoils. This article aims to design a multi-megawatt wind turbine blade in order to demonstrate the advantages of the NPU-MWA airfoils in improving wind energy capturing and structural weight reduction. The distributions of chord length and twist angle for a 5 MW wind turbine blade are optimized by a Kriging surrogate model-based optimizer, with aerodynamic performance being evaluated by blade element-momentum theory. The Reynolds-averaged Navier–Stokes equations solver was used to validate the improvement in aerodynamic performance. Results show that compared with an existing NREL (National Renewable Energy Laboratory) 5 MW blade, the maximum power coefficient of the optimized NPU 5 MW blade is larger, and the chord lengths at all span-wise sections are dramatically smaller, resulting in a significant structural weight reduction (9%). It is shown that the NPU-MWA airfoils feature excellent aerodynamic and structural performance for the design of multi-megawatt wind turbine blades.

Modeling of Rain Drop Erosion in a Multi-MW Wind Turbine

2015 ◽  
Author(s):  
Alessandro Corsini ◽  
Alessio Castorrini ◽  
Enrico Morei ◽  
Franco Rispoli ◽  
Fabrizio Sciulli ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Stokes Equations ◽  
Turbine Blades ◽  
Operating Conditions ◽  
Design Stage ◽  
Base Line ◽  
Horizontal Axis Wind Turbine ◽  
Relevant Effect ◽  
The Impact ◽  
Rain Erosion

The actual strategy in offshore wind energy development is oriented to the progressive increase of the turbine diameter as well as the per unit power. Among many pioneering technological and aerodynamic issues linked to this design trend, the wind velocity at the blade tip region reaches very high values in normal operating conditions (typically between 90 to 110 m/s). In this range of velocity, the rain erosion phenomenon can have a relevant effect on the overall turbine performance in terms of power and energy production (up to 20% loss in case of deeply eroded leading edge). Therefore, as a customary approach erosion related issues are accounted for in the scheduling of the wind turbine maintenance. When offshore, on the other hand, the criticalities inherent to the cost of maintenance and operation monitoring suggest the rain erosion concerns to be tackled at the turbine design stage. In so doing, the use of computational tools to study the erosion phenomenon of wind turbines under severe meteorological conditions could define the base-line approach in the wind turbine blades design and verification. In this work, the authors present a report on numerical prediction of erosion on a 6 MW HAWT (horizontal axis wind turbine). Two different blade geometries of different aerodynamic loading, have been studied in a view to explore their sensitivity to rain erosion. The fully 3D simulations are carried out using an Euler-Lagrangian approach. Flow field simulations are carried out with the open-source code OpenFOAM, based on a finite volume approach, using Multiple Reference Frame methodology. Reynolds Averaged Navier-Stokes equations for incompressible steady flow were solved with a k-ε turbulence. An in-house code (P-Track) is used to compute the rain drops transport and dispersion, adopting the Particle Cloud Tracking approach (PCT), already validated on large industrial turbomachinery. At the impact on blade, erosion is modelled accounting for the main quantities affecting the phenomenon, which are impact velocity and material properties of the target surface. Results provide the regions of the two blades more sensitive to erosion, and the effect of the blade geometry on erosion attitude.

Seagull in Wind Turbine Airfoil Blade Design Application Bionic

2013 ◽  
Vol 380-384 ◽  
pp. 4336-4339
Author(s):  
Hua Xin ◽  
Chun Hua Zhang ◽  
Qing Guo Zhang ◽  
Ping Wang
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Simulation Analysis ◽  
Turbine Blades ◽  
Clean Energy ◽  
Aerodynamic Performance ◽  
Blade Design ◽  
Wind Turbine Blades ◽  
Bionic Blade ◽  
Turbine Blade Design

Wind energy is an inexhaustible, an inexhaustible source of renewable and clean energy. Present due to the energy crisis and environmental protection and other issues, the use of wind more and more world attention. The wind turbine is the best form of wind energy conversion. Wind turbine wind turbine blades to capture wind energy is the core component of the blade in a natural environment to run directly in contact with air, with seagulls wings generate lift conditions are similar, so the gull wings airfoil and excellent conformation, with wind turbine blade design designed by combining the bionic blades. Through numerical simulation analysis found bionic blade aerodynamic performance than the standard blade aerodynamic performance has improved.

scholarly journals Detailed analysis of the blade root flow of a horizontal axis wind turbine

2016 ◽  
Vol 1 (2) ◽  
pp. 89-100 ◽  
Author(s):  
Iván Herráez ◽  
Buşra Akay ◽  
Gerard J. W. van Bussel ◽  
Joachim Peinke ◽  
Bernhard Stoevesandt
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Aerodynamic Performance ◽  
Negative Influence ◽  
Navier Stokes ◽  
Wind Turbine Blades ◽  
Force Coefficient ◽  
Horizontal Axis Wind Turbine ◽  
Blade Root ◽  
Root Region

Abstract. The root flow of wind turbine blades is subjected to complex physical mechanisms that influence significantly the rotor aerodynamic performance. Spanwise flows, the Himmelskamp effect, and the formation of the root vortex are examples of interrelated aerodynamic phenomena that take place in the blade root region. In this study we address those phenomena by means of particle image velocimetry (PIV) measurements and Reynolds-averaged Navier–Stokes (RANS) simulations. The numerical results obtained in this study are in very good agreement with the experiments and unveil the details of the intricate root flow. The Himmelskamp effect is shown to delay the stall onset and to enhance the lift force coefficient Cl even at moderate angles of attack. This improvement in the aerodynamic performance occurs in spite of the negative influence of the mentioned effect on the suction peak of the involved blade sections. The results also show that the vortex emanating from the spanwise position of maximum chord length rotates in the opposite direction to the root vortex, which affects the wake evolution. Furthermore, the aerodynamic losses in the root region are demonstrated to take place much more gradually than at the tip.

Preliminary Design of Wind Turbine Blades for Manufacture Using Local Capabilities

2001 ◽  
Author(s):  
Sarim N. Al-Zubaidy ◽  
Jacqueline Bridge ◽  
Alwyn Johnson
Keyword(s):  
Energy Source ◽  
Growth Rate ◽  
Wind Energy ◽  
Wind Turbine ◽  
Fluid Dynamic ◽  
Turbine Blades ◽  
Design Procedure ◽  
Wind Turbine Blades ◽  
Horizontal Axis Wind Turbine ◽  
Average Deviation

Abstract In the past ten to fifteen years wind energy remerged on the world scene with a very healthy growth rate, it has outstripped photovoltaics (solar cells) as the world’s fastest growing energy source, with a growth rate in excess of 30 percent per annum. No longer just a “nice idea for the future” Wind energy is becoming a mainstream energy source for many countries. The proposed paper will present a procedure (using numerical methods) for the design and analysis of Horizontal Axis Wind Turbine (HAWT) rotors. To ascertain the accuracy and to determine where further improvements could be initiated; numerical findings were then compared with published experimental test data and the compression showed an average deviation of less than 3% and therefore the simplifying assumptions made for the prediction of fluid behavior over an airfoil section was justified. Once the approach was validated and standardised a comprehensive airfoil design was produced. A computational fluid dynamic code coupled with a simple numerical algorithm aided the inverse design procedure. The final design was well proportioned and was theoretically able to meet the stated objective function and satisfied all the imposed constraints (manufacturing and geometrical). The geometrical data was then generated in a form suitable for manufacture using manually and numerically controlled machines.

scholarly journals Aerodynamic Performances of Small Scale Horizontal Axis Wind Turbine Blades for Applications in Malaysia

2019 ◽  
Vol 8 (4) ◽  
pp. 9557-9562
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Power Efficiency ◽  
Energy Production ◽  
Turbine Blades ◽  
Maximum Power ◽  
Small Scale ◽  
Wind Condition ◽  
Horizontal Axis Wind Turbine

Wind energy is one of the most viable options for clean and sustainable energy production. In Malaysia where wind source has been considered scarce, the capacity of installed wind energy production is very low. However, studies have shown that it is worthwhile to produce wind energy at several potential sites in this country. For this purpose, it is crucial that the designed turbine blade gives the highest possible blade power efficiency while structure wise, the turbine blade need to be effective in terms of avoiding possible failures. The maximum power efficiency means the blade does not only provide profile that gives maximum sliding ratio but also it must operate at the corresponding angle of attack, 𝜶𝒎𝒂𝒙 that gives this ratio. At the same time, the blade must be small enough to have low weight to allow it to self-start in the low wind region. In this paper, the study is focused on the aerodynamic aspect of the design of wind turbine blade that will give the maximum power efficiency. Four factors that determine aerodynamic performance of the turbine blades are discussed: the wind condition, the airfoil profile, the blade geometry and the losses. In most of the factor, adjustments are made such that the blade operates at around the 𝜶𝒎𝒂𝒙 so that the sliding ratio and thus power coefficient are maximum.

Optimal Design of Wind Turbine Blades with Wilson and BEM Method Integrated

2013 ◽  
Vol 404 ◽  
pp. 286-291
Author(s):  
Jiao Jiao Ding ◽  
Hao Wang ◽  
Li Ping Sun ◽  
Bing Ma
Keyword(s):  
Optimal Design ◽  
Wind Energy ◽  
Wind Turbine ◽  
Classical Method ◽  
Twist Angle ◽  
Turbine Blades ◽  
Target Function ◽  
Aerodynamic Performance ◽  
Energy Utilization ◽  
Utilization Coefficient

This paper presented a new dynamic optimal design method of wind turbine blade which combined the Wilson model with the BEM aerodynamic model. Considering the wind energy utilization coefficient as the target function, the Wilson theory was used to optimize a 1.5MW blades aerodynamic shape. The revised distribution of chord and twist angle was nearly of linear change in the main output power section of blade. The optimized wind energy utilization coefficient can reach 0.552, which is very closed to the Betz limitation. In the part of the calculation of aerodynamic performance, considering both the effect of solidity and eddy current loss on the aerodynamic performance calculation, and also considering the sensitivity of the initial value in a nonlinear equation, it utilized the blade element momentum theory (BEM) which was a classical method on the aerodynamic performance of blade to calculate the aerodynamic performance.The results shows the optimized power output can be up to 1.3426MW, and compared with the rated power, the efficiency reached 89%.

A 3D Wind Turbine Simulator for Aerodynamics Education

2013 ◽  
Author(s):  
John Moreland ◽  
Steve Dubec ◽  
Tyamo Okosun ◽  
Xiuling Wang ◽  
Chenn Zhou
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Mixed Reality ◽  
Turbine Blades ◽  
Blade Design ◽  
Horizontal Axis Wind Turbine ◽  
Energy Education ◽  
Educational Challenge ◽  
Aerodynamic Properties ◽  
Contour Plots

The energy production and performance of wind turbines is heavily impacted by the aerodynamic properties of the turbine blades. Designing a wind turbine blade to take full advantage of the available wind resource is a complex task, and teaching students the aerodynamic aspects of blade design can be challenging. To address this educational challenge, a 3D software package was developed as part of the Mixed Reality Simulators for Wind Energy Education project, sponsored through the U.S. Department of Education’s FIPSE program. The software is suited for introductory wind energy courses and covers topics including blade aerodynamics, wind turbine components, and energy transfer. The simulator software combines a 3D model of a utility-scale Horizontal Axis Wind Turbine (HAWT) with animation, a set of interactive controls, and a series of computational fluid dynamics (CFD) simulations of an airfoil under a number of conditions. Students can fly around the wind turbine to view from any angle, adjust transparency layers to view components inside the nacelle, adjust a cross-section plane along the length of a blade to view the details of the blade design, and manipulate sliders to adjust variables such as angle of attack and Reynolds number and see contour plots in real-time. The application is available for download at www.windenergyeducation.org, and is planned for release as open source.

Sign in / Sign up

Export Citation Format

Share Document