Composite Multiaxial Mechanics: Laminate Design Optimization of Taper-Less Wind Turbine Blades with Ramie Fiber-Reinforced Polylactic Acid

Lololau, Ardy; Soemardi, Tresna Priyana; Purnama, Harry; Polit, O.

doi:10.14716/ijtech.v12i6.5199

Cited by 4 publications

(4 citation statements)

References 23 publications

(25 reference statements)

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“…The Betz coefficient explains why a turbine blade cannot convert 100% of the energy in the wind into kinetic energy. This is due to losses in turbine components such as the main shaft, gearbox, and generator (Lololau et al, 2021). Before calculating the geometry of the blade, one must first know the angle of attack (α) and the Lift Coefficient (Cl).…”

Section: Resultsmentioning

confidence: 99%

Wind turbine optimization through optimal blade shape design for low wind speeds

Tira,

Juliawan,

Padang

et al. 2023

DTM

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Current electricity needs continue to rely on depleting fossil fuels such as fossil fuel and coal. The current government effort is to find non-fossil fuel alternative energy sources. Wind energy is one of the efforts to use ecologically friendly renewable alternative energy. Studies on the development and use of new and renewable energy are now undertaken. One of them is a series of research on the utilization of wind in numerous places of Indonesia through the construction of wind turbines. The blade that explicitly makes contact with the wind is one of the most critical sections of a wind turbine. The shape of the airfoil determines whether or not the blade is used. The focus of this research was to determine the optimal type of airfoil by comparing the coefficient of power (Cp), maximum power, and lowest power produced by various NACA (National Advisory Committee for Aeronautics) airfoils. NACA 4410, 4412, and 4415 airfoils were employed in this study.

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Section: Resultsmentioning

confidence: 99%

Wind turbine optimization through optimal blade shape design for low wind speeds

Tira,

Juliawan,

Padang

et al. 2023

DTM

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“…One of the most commonly used is NACA 4412 airfoil because it has a high cl/cd ratio. (Lololau et al, 2021). For instance, the NACA 4412 wing section has a 4% camber at 0.4 chords from the leading edge and a 12% thickness.…”

Section: Methodsmentioning

confidence: 99%

Modification of Horizontal Wind Turbine Blade: A Finite Element Analysis

Hamza¹,

Heidari²,

Ahmadizadeh³

et al. 2023

IJTech

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Turbines are efficient power generators. Because wind energy is a clean fuel source, it is widely utilized in some regions. One of the major factors affecting wind turbine performance is the angle of attack of the blade. The aerodynamics and efficiency can be improved by improvising the lift-to-drag ratio CL/CD to get the best design for wind turbine blades. There are many factors affecting the efficiency of horizontal wind turbine blades such as the angle of attack of the blade. Therefore, this study investigated the effect of the angle of attack on coefficients and forces, particularly on a blade with NACA 4412 airfoil in a horizontal axis wind turbine. The length, thickness, and chord length of the blade were 3m, 0.36m, and 0.12 m respectively. Computational Fluid Dynamics was used to develop to obtain lift and drag coefficients in a horizontal wind turbine blade. In addition, the correlation between different angles of attack, lift, and drag forces were studied and validated. The results demonstrated that the lift and drag coefficients increase as the angle of attack increases. Furthermore, the optimal angle of attack for this study was 0° because it has the highest lift-to-drag ratio, resulting in the greatest efficiency. The results demonstrated that it is possible to have a different lift and drag coefficient for the same angles of attack at a similar airfoil.

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“…On the other hand, ramie fiber has been used as reinforced in PLA composites due to its strength superiority among the stem fibers. Consequently, PLA and ramie fiber have been considered the most common natural constituents in biodegradable composite (Lololau et al, 2021) as a ramie fiber-reinforced polylactic-acid (RFRPLA).…”

Section: Introductionmentioning

confidence: 99%

Ramie Fiber-Reinforced Polylactic-Acid Prepreg: Fabrication and Characterization of Unidirectional and Bidirectional Laminates

Soemardi,

Polit,

Salsabila

et al. 2023

IJTech

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The fabrication of a natural prepreg with poly-lactic acid (PLA) matrix and ramie fiber reinforcement was engineered on a laboratory scale by impregnating the unidirectional and bidirectional ramie fiber with PLA matrix solvent on a glass die. The obtained composite prepreg has been stored at a very low temperature to maximize its shelf life. Tensile and biodegradability tests of the composite laminates prepared by the hot-pressing method have also been conducted. Tensile test results show that the freezer-stored bidirectional 0/90° prepreg laminate specimen has the highest tensile strength of 71.44 MPa with a modulus of 2.70 GPa on average. Meanwhile, the unstored bidirectional 0/90° prepreg laminate specimen has the highest level of elasticity, with a modulus of 1.29 GPa on average. The biodegradability test shows the decomposition process of the composite laminate under actual composting conditions. Microscopic observation of the damaged specimen results shows good adhesion between the PLA matrix and ramie fiber and the decomposition of the biodegradability test samples.

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Composite Multiaxial Mechanics: Laminate Design Optimization of Taper-Less Wind Turbine Blades with Ramie Fiber-Reinforced Polylactic Acid

Cited by 4 publications

References 23 publications

Wind turbine optimization through optimal blade shape design for low wind speeds

Wind turbine optimization through optimal blade shape design for low wind speeds

Modification of Horizontal Wind Turbine Blade: A Finite Element Analysis

Ramie Fiber-Reinforced Polylactic-Acid Prepreg: Fabrication and Characterization of Unidirectional and Bidirectional Laminates

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