Volume 20, Issue 7 (July 2020)                   Modares Mechanical Engineering 2020, 20(7): 1773-1788 | Back to browse issues page

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1- Mechanical Engineering Departement, Engineering Faculty, Payam-e-Noor University, Tehran, Iran
2- Mechanical Engineering Departement, Engineering Faculty, Payam-e-Noor University, Tehran, Iran , a_jalali@pnum.ac.ir
3- Wind Sun Research Center, Ferdowsi University of Mashhad, Mashhad, Iran
Abstract:   (7941 Views)
Humans are always looking for ways to produce cheap and permanent electricity. One of these ways is to use wind turbines. The vertical axis wind turbines are less sensitive due to the problem of the setup and low efficiency compared to the horizontal axis turbines. One way to improve the performance of VAWTs is to change the angle of attack of the wind turbine blade. In this study, the computational fluid dynamics method is used to solve the finite volume flow equations. Different angles of attack range from -12 to +10 degrees and wind speeds of 10m/s and density of 1.225kg/m3 and constant dynamic viscosity of 1.825psi were used. The calculations showed that by increasing the angle of attack of the blade to +10 degrees  Cp and Torque decreased, by decreasing angle of attack of the blade to -4 degree, Cp and Torque increased, but by more decreasing AOA of -8 to -12 degrees Cp and torque decreased.
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Article Type: Original Research | Subject: Aerodynamics
Received: 2019/10/21 | Accepted: 2020/03/22 | Published: 2020/07/20

References
1. ren21.net [Internet]. Paris: Renewables 2018 global status report; 2018. [Unknown Cited]. Available from: https://www.ren21.net/reports/global-status-report/. [Link]
2. Lanzafame R, Messina M. Design and performance of a double-pitch wind turbine with non-twisted blades. Renewable Energy. 2009;34(5):1413-1420. [Link] [DOI:10.1016/j.renene.2008.09.004]
3. Abbasi T, Premalatha M, Abbasi T, Abbasi SA. Wind energy: Increasing deployment, rising environmental concerns. Renewable and Sustainable Energy Reviews. 2014;31:270-288. [Link] [DOI:10.1016/j.rser.2013.11.019]
4. Kinaci E. Numerical and experimental investigation of the rotor blades of an HAWT with a profile HKAS inspired by a maple seed [Dissertation]. Duisburg: University of Duisburg-Essen; 2011. [Link]
5. Abdolrahim R, Kalkman I, Blocken B. Effect of pitch angle on power performance and aerodynamics of a vertical axis wind turbine. Applied Energy. 2017;197:132-150. [Link] [DOI:10.1016/j.apenergy.2017.03.128]
6. Elsakka MM, Ingham DB, Ma L, Pourkashanian M. CFD analysis of the angle of attack for a vertical axis wind turbine blade. Energy Conversion and Management. 2019;182:154-165. [Link] [DOI:10.1016/j.enconman.2018.12.054]
7. Guo Y, Li X, Sun L, Gao Y, Gao Z, Chen L. Aerodynamic analysis of a step adjustment method for blade pitch of a VAWT. Journal of Wind Engineering and Industrial Aerodynamics. 2019;188:90-101. [Link] [DOI:10.1016/j.jweia.2019.02.023]
8. Esfandyari A, Bazargan M. Numerical investigation of the effect of junction and initial blade step on performance of a vertical axis bad turbine. Modares Mechanical Engineering. 2014;14(2):79-84. [Link]
9. Sagharchi A, Maghrebi MJ, Arabgelarche AR. Numerical investigation of darius wind turbine with variable step angle. Second International Conference and Third National Conference on the Application of New Technologies in Engineering Sciences, Ferdowsi University of Mashhad. Tehran: Civilica; 2015. [Link]
10. Khosravi H, Jamil M, Sabaeefard P. Optimization of the saunius wind turbine by CFD calculation of blade effects. The First Annual Conference on Clean Energy, International Center for Advanced Science and Technology and Environmental Sciences, Kerman. Tehran: Civilica; 2010. [Link]
11. White F. Viscous fluid flow. 2nd Edition. New York: McGraw-Hill; 1991. [Link]
12. Chorin, AJ. Vorticity and turbulence. London: Springer; 1994. [Link] [DOI:10.1007/978-1-4419-8728-0]
13. Katz J, Plotkin A. Low speed aerodynamics. Cambridge: Cambridge University Press; 2012. [Link]
14. Moran J. An introduction to theoretical and computational aerodynamics (Dover books on aeronautical engineering). New York: Dover Publications; 2010. [Link]
15. Blazek J. Computational fluid dynamics: Principles and applications. 2nd Edition. Amsterdam: Elsevier; 2005. [Link]
16. Bravo R, Tullis S, Ziada S. Performance testing of a small vertical-axis wind turbine. Conference Proceedings of the 21st Canadian Congress of Applied Mechanics (CANCAM07); 2007 Jun 3, Quebec, Canada. Unknown Publisher; 2007. [Link]
17. Zamani M, Nazari S, Moshizi SA, Maghrebi MJ. Three dimensional simulation of J-shaped darrieus vertical axis wind turbine. Energy. 2016;116(1):1243-1255. [Link] [DOI:10.1016/j.energy.2016.10.031]
18. Almohammadi K, Ingham DB, Ma L, Pourkashanian M. CFD modelling Investigation of a straight-blade vertical axis wind turbine. The 13th International Conference on Wind Engineering (ICWE13), 2011, Amsterdam, Netherland. Unknown Publisher; 2011. [Link]

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