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Aerodynamic Performance and Vibration Analyses of Small Scale Horizontal Axis Wind Turbine with Various Number of Blades

DOI: 10.4236/jpee.2018.66006, PP. 76-105

Keywords: Horizontal Axis Wind Turbine, Power Coefficient, Moment Coefficient, Mode Shape, Natural Frequency, CFD, Moving Reference Frame, Sliding Mesh Model

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The need to generate power from renewable sources to reduce demand for fossil fuels and the damage of their resulting carbon dioxide emissions is now well understood. Wind is among the most popular and fastest growing sources of alternative energy in the world. It is an inexhaustible, indigenous resource, pollution-free, and available almost any time of the day, especially in coastal regions. As a sustainable energy resource, electrical power generation from the wind is increasingly important in national and international energy policy in response to climate change. Experts predict that, with proper development, wind energy can meet up to 20% of US needs. Horizontal Axis Wind Turbines (HAWTs) are the most popular because of their higher efficiency. The aerodynamic characteristics and vibration of small scale HAWT with various numbers of blade designs have been investigated in this numerical study in order to improve its performance. SolidWorks was used for designing Computer Aided Design (CAD) models, and ANSYS software was used to study the dynamic flow around the turbine. Two, three, and five bladed HAWTs of 87 cm rotor diameter were designed. A HAWT tower of 100 cm long and 6 cm diameter was considered during this study while a shaft of 10.02 cm diameter was chosen. A good choice of airfoils and angle of attack is a key in the designing of a blade of rough surface and maintaining the maximum lift to drag ratio. The S818, S825 and S826 airfoils were used from the root to the tip and 4° critical angle of attack was considered. In this paper, a more appropriate numerical models and an improved method have been adopted in comparable with other models and methods in the literature. The wind flow around the whole wind turbine and static behavior of the HAWT rotor was solved using Moving Reference Frame (MRF) solver. The HAWT rotor results were used to initialize the Sliding Mesh Models (SMM) solver and study the dynamic behavior of HAWT rotor. The pressure and velocity contours on different blades surfaces were analyzed and presented in this work. The pressure and velocity contours around the entire turbine models were also analyzed. The power coefficient was calculated using the Tip Speed Ratio (TSR) and the moment coefficient and the results were compared to the theoretical and other research. The results show that the increase of number of blades from two to three increases the efficiency; however, the power coefficient remains relatively the same or sometimes decreases for five bladed turbine models. HAWT rotors and shaft vibrations were analyzed for


[1]  (2008) 20% Wind Energy by 2030. [Electronic Resource]: Increasing Wind Energy’s Contribution to U.S. Electricity Supply. n.p.: U.S. Dept. of Energy, Energy Efficiency and Renewable Energy, Washington DC.
[2]  Tasri, A. and Susilawati, A. (2014) Original Research Article: Selection among Renewable Energy Alternatives Based on a Fuzzy Analytic Hierarchy Process in Indonesia. Sustainable Energy Technologies and Assessments, 7, 34-44.
[3]  Hordon, R.M. (2015) Atmospheric Sciences. Salem Press Encyclopedia of Science Research Starters.
[4]  Mohamad, A., et al (2014) Review of Analysis on Vertical and Horizontal Axis Wind Turbines. Applied Mechanics & Materials, 695, 801-805.
[5]  Jeong, M.-S., Cha, M.-C., Kim, S.-W. and Lee, I. (2015) Numerical Investigation of Optimal Yaw Misalignment and Collective Pitch Angle for Load Imbalance Reduction of Rigid and Flexible HAWT Blades under Sheared Inflow. Energy, 84, 518-532.
[6]  Leithead, W. and Connor, B. (2010) Control of Variable Speed Wind Turbines: Dynamic Models. International Journal of Control, 73, 1173-1189.
[7]  Murtagh, P.J., Ghosh, A., Basu, B. and Broderick, B.M. (2008) Passive Control of Wind Turbine Vibrations Including Blade/Tower Interaction and Rotationally Sampled Turbulence. Wind Energy, 11, 305-317.
[8]  Kumara, A., Dwivedia, A., Paliwala, V. and Patil, P.P. (2014) Free Vibration Analysis of Al 2024 Wind Turbine Blade Designed for Uttarakhand Region Based on FEA. Procedia Technology, 14, 336-347.
[9]  Duque, E.P.N. and Michael, D.B. (2003) Navier-Stokes and Comprehensive Analysis Performance Predictions of the NREL Phase VI Experiment. Journal of Solar Energy Engineering, 125, 457-467.
[10]  Hsiao, F.-B., Bai, C.-J. and Chong, W.-T. (2013) The Performance Test of Three Different Horizontal Axis Wind Turbine (HAWT) Blade Shapes Using Experimental and Numerical Methods. Energies, 6, 2784-2803.
[11]  Li, D.S., Li, R.N., Wei, L.J., Wang, X.Y., Qiang, Y. and Li, Y.R. (2013) Comparison of the Pressure Distribution of a Wind Turbine Blade Based on Field Experiment and CFD. IOP Conf. Series: Materials Science and Engineering 52 vol. 052004.
[12]  Sagol, E., Reggio, M. and Ilinca, A. (1989) Determination of Elastic Twist in Horizontal Axis Wind Turbines (HAWTs). ISRN Mechanical Engineering, 2012, Article ID: 428671.
[13]  Bai, C.J., Hsiao, F.B., Li, M.H., Huang, G.Y. and Chen, Y.J. (2013) Design of 10 kW Horizontal-Axis Wind Turbine (HAWT) Blade and Aerodynamic Investigation Using Numerical Simulation. Procedia Engineering, 67, 279-287.
[14]  Shah, T., Prasad, R. and Damodaran, M. (2013) Computational Modeling of Wind Energy Systems. Proceedings of the 8th Asia-Pacific Conference on Wind Engineering (APCWE-VIII), Chennai, 10-14 December 2013.
[15]  Rahman, M., Johnson, J., Pate, D., Sawinski, J., Seeloff, T., Ball, J., Molina, G., El Shahat, A. and Soloiu, V. (2016) Finite Element Structural Analysis of Commonly Used Horizontal Axis Wind Turbine Air-foils of Various Geometries. ASME 2016 International Mechanical Engineering Congress and Exposition (IMECE), Phoenix Convention Center, Phoenix, AZ, 11-17 November 2016, V010T13A017.
[16]  Wang, T.G., Wang, L., Zhong, W., Xu, B.F. and Chen, L. (2012) Large-Scale Wind Turbine Blade Design and Aerodynamic Analysis. Chinese Science Bulletin Kexue Tongbao No. 5.


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