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

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

Authors

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

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

How to Cite

Sigit Iswahyudi, Setyawan Bekti Wibowo, Suyitno Suyitno, Agus Suprihanto (2024). Aerodynamic Performance and Noise Characteristics of Modified Blade Tip of Small HAWT. Journal of Engineering and Technological Sciences, Vol. 56 No. 5 (2024), 639-651. https://doi.org/10.5614/j.eng.technol.sci.2024.56.5.8

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Date Log

Submitted
October 1, 2024
Published
September 30, 2024

Keywords

  • anhedral
  • blade planform
  • noise
  • sweep
  • tip shape

Issue

Vol. 56 No. 5 (2024)

Section

Articles

How to Cite

Aerodynamic Performance and Noise Characteristics of Modified Blade Tip of Small HAWT. (2024). 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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