Commenced in January 2007
Paper Count: 31821
Comparison of Two Airfoil Sections for Application in Straight-Bladed Darrieus VAWT
Abstract:This paper presents a model for the evaluation of energy performance and aerodynamic forces acting on a small straight-bladed Darrieus-type vertical axis wind turbine depending on blade geometrical section. It consists of an analytical code coupled to a solid modeling software, capable of generating the desired blade geometry based on the desired blade design geometric parameters. Such module is then linked to a finite volume commercial CFD code for the calculation of rotor performance by integration of the aerodynamic forces along the perimeter of each blade for a full period of revolution.After describing and validating the computational model with experimental data, the results of numerical simulations are proposed on the bases of two candidate airfoil sections, that is a classical symmetrical NACA 0021 blade profile and the recently developed DU 06-W-200 non-symmetric and laminar blade profile.Through a full CFD campaign of analysis, the effects of blade geometrical section on angle of attack are first investigated and then the overall rotor torque and power are analyzed as a function of blade azimuthal position, achieving a numerical quantification of the influence of airfoil geometry on overall rotor performance.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1061152Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 3657
 Glauert, H., "Airplane Propellers", Aerodynamic Theory, Dover Publication Inc, New York, 1963, Vol. 4, Division L, 169-360.
 Templin, R. J., "Aerodynamic Performance of Vertical-Axis Wind Machines", ASME Paper 75-WA/ENER-1, 1975;
 Strickland, J. H., "The Darrieus Turbine: A Performance Prediction Model Using Multiple Streamtube", SAND75-0431;
 Sheldal, R. E., Klimas, P. C., "Aerodynamic Characteristics of Seven Symmetrical Airfoil Sections Through 180-Degree Angle of Attack for Use in Aerodynamic Analysis of Vertical Axis Wind Turbines", SAND80-2114, Unlimited Release, UC-60;
 Burton, T., Sharpe, D., Jenkins, N., Bossanyi, E., Wind Energy Handbook, John Wiley & Sons, Ltd, 2001;
 Stathopoulos, T., "Wind Effects on People", Proceedings of the International Conference on Urban Wind Engineering and Building Aerodynamics - Impact of Wind Storm on City Life and Built Environment, COST Action C14, Von Karman Institute, Rode-Saint- Genèse (Belgium), 2004;
 Jensen, A. G., Franke, J., Hirsch, C., Schatzmann, M., Stathopoulos, T., Wisse, J., Wright, N. G., "CFD Techniques - Computational Wind Engineering", Proceedings of the International Conference on Urban Wind Engineering and Building Aerodynamics - Impact of Wind and Storm on City Life and Built Environment - Working Group 2, COST Action C14, Von Karman Institute, Rode-Saint-Genèse (Belgium), 2004;
 Raciti Castelli, M., Analisi numerica delle prestazioni di una microturbina eolica ad asse verticale modello Darrieus, PhD Thesis (in Italian), Universit├á di Padova, Italy, 2010, pp. 193-194;
 Simao Ferreira, C. J., Bijl, H., van Bussel, G., van Kuik, G., "Simulating Dynamic Stall in a 2D VAWT: Modeling Strategy, Verification and Validation with Particle Image Velocimetry Data", The Science of Making Torque from Wind, Journal of Physics: Conference Series 75, 2007;
 Simao Ferreira, C.J., van Bussel, G., Scarano, F., van Kuik, G., "2D PIV Visualization of Dynamic Stall on a Vertical Axis Wind Turbine", AIAA, 2007;
 Raciti Castelli, M., Benini, E., "Effect of Blade Inclination Angle on a Darrieus Wind Turbine", Journal of Turbomachinery, May 2011, Vol. 134, 031016-1-10.
 Raciti Castelli, M., Englaro, A., Benini, E., "The Darrieus Wind Turbine: Proposal for a New Performance Prediction Model Based on CFD", Energy 36 (2011) 4919-4934.
 Raciti Castelli, M., Villa, A., Benini, E., "CFD Analysis of the Influence of Central Shaft on Vertical-Axis Wind Turbine Noise Emission", Fourth International Meeting on Wind Turbine Noise, Rome, Italy, 12- 14 April 2011.
 Claessens, M. C., The Design and Testing of Airfoils for Application in Small Vertical Axis Wind Turbines, Master of Science Thesis, Faculty of Aerospace Engineering, Delft University of Technology, November 9th, 2006.
 Abbott, H., Von Doenhoff, A. E., Theory of Wing Sections, Dover Publications, New York, 1959.
 Raciti Castelli, M., Ardizzon, G., Battisti, L., Benini, E., Pavesi, G., "Modeling Strategy and Numerical Validation for a Darrieus Vertical Axis Micro-Wind Turbine", ASME International Mechanical Engineering Congress & Exposition, Vancouver, British Columbia, Nov 12-18, 2010, IMECE2010-39548.
 Fluent Inc., Fluent User-s Manual, pp. 52, 54, 59, 71, 143.
 Cummings, R.M., Forsythe, J.R., Morton, S.A., Squires, K.D., "Computational Challenges in High Angle of Attack Flow Prediction", 2003, Progr Aerosp Sci 39(5):369-384.