TY - JOUR
T1 - Experimental and Numerical Study of Installed Circular and I-65° Type Cylinders Toward Returning-Blade Savonius Turbine for Augmented Aerodynamic Performance
AU - Sakti, Gunawan
AU - Yuwono, Triyogi
AU - Widodo, Wawan Aries
N1 - Publisher Copyright:
© 2023 Praise Worthy Prize S.r.l.-All rights reserved.
PY - 2023
Y1 - 2023
N2 - In this essential investigation, the center point returning turbine blade of a Savonius has been positioned in a staggered alignment with a cylinder type I-65°. The conventional circular cylinder has been cut at an angle of 65° on both sides. This kind of cylinder, known as a cylinder, I-65° type, is made to reduce the aerodynamic drag force on the returning blade. The investigation has been performed under two scenarios, conventional and tandem turbine with installing a Cylinder I-65°. The staggered angle has been set within-20°≤α≤90° relative to the center point of the returning turbine blade. Experimental and numerical approaches based on those scenarios have examined the wind turbine performance. Based on a wind speed (U∞) of 5 m/s, the study has used a width L=2D-b, where D refers to the turbine blade outside diameter, and b is the turbine e-gap. The 0.5D-diameter cylinder I-65° type is positioned 1.4D upstream of the returning turbine blade. In the CFD study, a 2D numerical computation has been iterated by using ANSYS Fluent® 19.1 in order to investigate the Savonius turbine flow. The experiment results indicate that positioning Cylinder I-65° upstream of the returning blade can raise the Savonius turbine power. Furthermore, adding a Cylinder I-65° has enhanced the maximum Cp of the Savonius turbines by about 12%. The peak CP is obtained at a tips-speed ratio λ=0.8 and staggered angle α=0°. Numerical analysis has been carried out to analyze the airflow phenomenon around the turbine more deeply, and the results have showed good agreement to reveal and strengthen experimental quantitative data.
AB - In this essential investigation, the center point returning turbine blade of a Savonius has been positioned in a staggered alignment with a cylinder type I-65°. The conventional circular cylinder has been cut at an angle of 65° on both sides. This kind of cylinder, known as a cylinder, I-65° type, is made to reduce the aerodynamic drag force on the returning blade. The investigation has been performed under two scenarios, conventional and tandem turbine with installing a Cylinder I-65°. The staggered angle has been set within-20°≤α≤90° relative to the center point of the returning turbine blade. Experimental and numerical approaches based on those scenarios have examined the wind turbine performance. Based on a wind speed (U∞) of 5 m/s, the study has used a width L=2D-b, where D refers to the turbine blade outside diameter, and b is the turbine e-gap. The 0.5D-diameter cylinder I-65° type is positioned 1.4D upstream of the returning turbine blade. In the CFD study, a 2D numerical computation has been iterated by using ANSYS Fluent® 19.1 in order to investigate the Savonius turbine flow. The experiment results indicate that positioning Cylinder I-65° upstream of the returning blade can raise the Savonius turbine power. Furthermore, adding a Cylinder I-65° has enhanced the maximum Cp of the Savonius turbines by about 12%. The peak CP is obtained at a tips-speed ratio λ=0.8 and staggered angle α=0°. Numerical analysis has been carried out to analyze the airflow phenomenon around the turbine more deeply, and the results have showed good agreement to reveal and strengthen experimental quantitative data.
KW - Coefficient of Moment
KW - Coefficient of Power
KW - Cylinder I-65° Type
KW - Returning Blade
KW - Savonius Turbine
UR - http://www.scopus.com/inward/record.url?scp=85166043648&partnerID=8YFLogxK
U2 - 10.15866/ireme.v17i3.22914
DO - 10.15866/ireme.v17i3.22914
M3 - Article
AN - SCOPUS:85166043648
SN - 1970-8734
VL - 17
SP - 120
EP - 131
JO - International Review of Mechanical Engineering
JF - International Review of Mechanical Engineering
IS - 3
ER -