Aerodynamic Performance and Noise Characteristics of Modified Blade Tip of Small HAWT

Sigit Iswahyudi; Setyawan Bekti Wibowo; Suyitno Suyitno; Agus Suprihanto

doi:10.5614/j.eng.technol.sci.2024.56.5.8

Authors

Sigit Iswahyudi
sigit.iswahyudi@untidar.ac.id
Department of Mechanical Engineering, Faculty of Engineering, Universitas Tidar, Jalan Kapten Suparman No. 39 Magelang, 56116, Indonesia
Setyawan Bekti Wibowo Department of Mechanical Engineering, Vocational College, Universitas Gadjah Mada, Jalan Yacaranda Sekip Unit IV, Yogyakarta, 55281, Indonesia
Suyitno Suyitno Professional Education of Engineers Faculty of Engineering Universitas Diponegoro, Jalan Prof. Soedarto, SH, Tembalang, Semarang 50275, Indonesia
Agus Suprihanto Professional Education of Engineers Faculty of Engineering Universitas Diponegoro, Jalan Prof. Soedarto, SH, Tembalang, Semarang 50275, Indonesia

Vol. 56 No. 5 (2024)

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Published September 30, 2024

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The planform design of a wind turbine blade influences its aerodynamic performance and noise characteristics, with the tip shape controlling vortex shedding, power, and noise. This study examined the tip shape’s effect on a small horizontal-axis wind turbine (HAWT). Field tests were conducted on three rotors: one with straight blades, one with low swept angle (12° and 61° sweep, 15° anhedral) blades, and one with high swept angle (32° and 72° sweep, 15° anhedral) blades. All had three blades, a tip speed ratio (TSR) of 5.24, and an NACA 4412 cross-section. The basic blade rotor and the modified blade 1 rotor had a 2.1 m diameter, while the modified blade 2 rotor had a 2.8 m diameter. The modified blades had revised tips along 10% of the radius. The results showed maximum power coefficients of 0.25, 0.2, and 0.15 for the basic blade, modified blade 1, and modified blade 2, respectively. modified blade 2 exhibited the best starting behavior, needing only 1 m/s wind speed. It also reduced low-frequency noise while increasing high-frequency noise, which is more effectively absorbed by the atmosphere. The swept blade tips lowered power performance but improved start-up and reduced low-frequency noise

Iswahyudi, S., Wibowo, S. B., Suyitno, S., & Suprihanto, A. (2024). Aerodynamic Performance and Noise Characteristics of Modified Blade Tip of Small HAWT. Journal of Engineering and Technological Sciences, 56(5), 639–651. https://doi.org/10.5614/j.eng.technol.sci.2024.56.5.8

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Göçmen, T. & Özerdem, B., Airfoil Optimization for Noise Emission Problem and Aerodynamic Performance Criterion on Small Scale Wind Turbines, Energy, 46(2012), pp. 62-71, June 2012.

Hsiao, F.B., Bai, C.J. & Chong, W.T., The Performance Test of Three Different Horizontal Axis Wind Turbine (HAWT) Blade Shapes Using Experimental and Numerical Methods, Energies, 6(6), pp. 2784-2803, 2013.

Singh, R.K. & Ahmed, M.R., Blade Design and Performance Testing of a Small Wind Turbine Rotor for Low Wind Speed Applications, Renewable Energy, 50(2013), pp. 812-819, Sept. 2012.

Wang, Q., Wang, J., Chen, J., Luo, S. & Sun, J., Aerodynamic Shape Optimized Design for Wind Turbine Blade Using New Airfoil Series, Journal of Mechanical Science and Technology, 29(7), pp. 2871-2882, 2015.

Chattot, J.J., Effects of Blade Tip Modifications on Wind Turbine Performance Using Vortex Model, Comput, Fluids, 38(7), pp. 1405-1410, April 2008.

Pavese, C., Kim, T. & Murcia, J.P., Design of a Wind Turbine Swept Blade through Extensive Load Analysis, Renewable Energy, 102(2017), pp. 21-34, Oct. 2016.

Shen, X., Yang, H., Chen, J., Zhu, X. & Du, Z., Aerodynamic Shape Optimization of Non-straight Small Wind Turbine Blades, Energy Conversion and Management, 119(2016), pp. 266-278, April 2016.

Dilimulati, A., Stathopoulos, T. & Paraschivoiu, M., Wind Turbine Designs for Urban Applications: A Case Study of Shrouded Diffuser Casing for Turbines, J. Wind Eng. Ind. Aerodyn, 175(2018), pp. 179-192, September 2017, pp. 179-192, 2018.

Göttlich, E., Research on the Aerodynamics of Intermediate Turbine Diffusers, Prog. Aerosp. Sci., 47(2011), pp. 249-279, April 2011.

Hjort S. & Larsen, H., Rotor Design for Diffuser Augmented Wind Turbines, Energies, 8, pp. 10736-10774, Sept. 2015.

Khamlaj, T.A. & Rumpfkeil, M.P., Theoretical Analysis of Shrouded Horizontal Axis Wind Turbines, Energies, 10(38), pp. 1-19, Jan. 2017.

Ellenbogen, J.M.et al., Wind Turbine Health Impact Study: Report of Independent Expert Panel, Massachusetts Department of Environmental and Massachusetts Department of Public Health, Boston, Jan. 2012.

Laratro, A., Arjomandi, M., Kelso, R. & Cazzolato, B., A Discussion of Wind Turbine Interaction and Stall Contributions To Wind Farm Noise, J. Wind Eng. Ind. Aerodyn, 127(2014), pp. 1-10, Feb. 2014.

Bertagnolio, F., A Noise Generation and Propagation Model for Large Wind Farms a Noise Generation and Propagation Model for Large Wind Farms, in Acoustic for 21st Century, pp. 1–10, 2016.

Technical Committee lSO/TC 43, Acoustics-attenuation of Sound during Propagation Outdoors, in ISO 9613-1, ed. 1, International Organization for Standardization, 1993.

Bertagnolio, F., Aagaard Madsen, H., Fischer, A. & Bak, C., Basic Principles and Evidences of Wind Turbine Noise Generation Mechanisms [Sound/Visual production (digital)], 2015.

Freitag, W. & Schulze, E.T., Blended Winglets Improve Performance, Aero Quartely, https://www.boeing.com/commercial/aeromagazine/articles/qtr_03_09/pdfs/AERO_Q309_article03.pdf, (13 May 2020).

Anderson, J.D., Fundamentals of Aerodynamics, ed. 5, McGraw-Hill, 2011.

Rom, J., High Angle of Attack Aerodynamics, ed. 1, Springer-Verlag, 1992.

Brocklehurst, A. & Barakos. G.N., A Review of Helicopter Rotor Blade Tip Shapes, Prog. Aerosp. Sci., 56(2013), pp. 35-74, August 2013.

Maniaci, D., Wind Turbine Design using a Free-Wake Vortex Method with Winglet Application, PhD dissertation, The Graduate School College of Engineering, The Pennsylvania State University, State College, 2013.

Sedaghat, A., Hassanzadeh, A., Jamali, J., Mostafaeipour, A. & Chen, W., Determination of Rated Wind Speed for Maximum Annual Energy Production of Variable Speed Wind Turbines, Appl. Energy, 205(2017), pp. 781-789, August 2017.

Ragheb, M. & Ragheb, A.M., Wind Turbines Theory - the Betz Equation and Optimal Rotor Tip Speed Ratio, Fundamental and Advanced Topics in Wind Power, Rupp Carriveau, pp. 19-38, 2011.

Gundtoft, S., Wind Turbines, Ed. 2, University College of Arhus, 2009.

Commission, I.E., IEC 61400-12-1: Power Performance Measurements of Electricity Producing Wind Turbines, in Wind turbines, 1st ed., Geneva, International Electrotechnical Commission, 2005.

IEC 61400-11:2006, Wind Turbine Generator Systems-Acoustic Noise Measurement Techniques, International Electrotechnical Commission, 2006.

Iswahyudi, S., Sutrisno, Prajitno & Wibowo, S.B., Effect of Blade Tip Shapes on the Performance of a Small HAWT: An Investigation in a Wind Tunnel, Case Study Therm. Eng., 19(2020), pp. 1-9, March 2020.

Eargle, J.M., Electroacoustical Reference Data, Springer Science+Business Media, 2002.