Experimental and Numerical Studies on Aerodynamic Control of NACA 4418 Airfoil with a Rotating Cylinder

Lou, Bin; Huang, Zhiyi; Ye, Shangjun; Wang, Gaofeng

doi:10.1007/s42417-019-00085-5

Cited by 9 publications

(5 citation statements)

References 18 publications

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“…Stall appears at around 21 degrees in angle of attack for both HC and SC models. In fact, critical angle of attack for appearance of stall for the NACA 4418 airfoil was also found around 16 degrees [8]. However, surface imperfections and roughness can cause a flow separation, leading experimental stall angle to deviate from expected values [9].…”

Section: Aerodynamic Coefficientsmentioning

confidence: 95%

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Design, Analysis, and Wind Tunnel Evaluation of Novel Fabric-Covered Rotor Blades in Wind Energy Generation

Jelili,

Beyer,

Ritschel

2024

J. Phys.: Conf. Ser.

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This paper investigates the performance of a novel fabric-covered rotor blade. The study aims to address the need for cost-effective wind turbine blades by exploring the potential of textile-based materials. The research includes a comprehensive wind tunnel experiment to evaluate the aerodynamic response of the fabric-covered blade, compared to a traditional hard-shell blade. The experimental data are systematically processed and corrected for wind tunnel effects, providing valuable insights into the aerodynamic behavior of the novel blade. The results show that the fabric-covered blade, constructed from PTFE-coated fiberglass fabric, exhibits promising aerodynamic characteristics, with potential applications in reducing manufacturing expenses and enhancing power generation. The study concludes by proposing a novel control strategy leveraging the natural deformation of blades at high wind speeds, suggesting potential applications in limiting power output at high wind speeds. Overall, these findings contribute to the ongoing efforts in developing innovative and cost-efficient solutions for wind energy generation.

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Section: Aerodynamic Coefficientsmentioning

confidence: 95%

“…However, surface imperfections and roughness can cause a flow separation, leading experimental stall angle to deviate from expected values [9]. In addition, onset of stall also depends on Reynolds numbers [8].…”

Section: Aerodynamic Coefficientsmentioning

confidence: 96%

Design, Analysis, and Wind Tunnel Evaluation of Novel Fabric-Covered Rotor Blades in Wind Energy Generation

Jelili,

Beyer,

Ritschel

2024

J. Phys.: Conf. Ser.

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“…Table 1 shows information for 1 OPT blade with each section as in Figure 1 having its airfoil distance with different chord sizes and twist degrees. Due to its high lift and low drag coefficients, small HAWT blades frequently utilize the NACA 44xx and NACA 230xx family airfoils [21]. The NACA 4418 was employed in this study, with a maximum lift-to-drag ratio of 44.447, which equates to an angle of attack of 6.5° and a lift coefficient of 1.209.…”

Section: Methodology 21 Wind Turbine Specificationmentioning

confidence: 99%

Impact Tip Speed Ratio in Performance Analysis for Horizontal Axis Wind Turbine (HAWT) with Optimal Twist and Tapered (OPT) Blade Shape

Muhammad Al,Ain Mat Zin,

Izuan Amin Ishak,

Mohammad Arafat

et al. 2024

CFDL

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Performance for Horizontal Axial Wind Turbine (HAWT) is influenced by the difference in tip speed ratio (TSR) and mesh distribution. The objective of this article is to study the optimal performance of wind turbines when subjected to different mesh resolution, TSR and wind speed velocity.Therefore, it is important to study the effects of different mesh resolutions in terms of wind turbine performance. To achieve that, a 0.65m optimal twist and tapered (OPT) blade is used with various inlet velocities and TSR. This study uses the k-ꞷ shear-stress transport (SST) based Reynold-Average Navier Stokes (RANS) approach in commercial ANSYS Fluent CFD software. This simulation was performed using the Moving Ratio Frame (MRF) method. To find the optimum grid resolution, a Grid Independence Test (GIT) was conducted comparing the coefficient of power (Cp). From the RESULT, TSR 6 shows the best HAWT performance when Cp for inlet velocity 8 m/s is 0.2608.

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“…The advantage of the NACA 4418 blade is to enhance the aerodynamic efficiency by its flow control behaviour. Also, this airfoil has the capability to improve the lift to drag ratio for certain wind directions and speed by varying the airfoil's thickness coefficients suitably (Lou et al 2020).…”

Section: Bend Diffuser Design With Intake Funnel Type Hopper Natural ...mentioning

confidence: 99%

Investigations on Integrated Funnel, Fan and Diffuser Augmented Unique Wind Turbine to Enhance the Wind Speed

2023

JAFM

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Wind energy is an alternative future energy to fossil fuels since it is abundant and green energy. As a result, high performance unique design is proposed that has a diffuser augmented wind turbine including intake funnel with guide vanes, natural fan, straight flow section, exit splitter with air openings and end flange. This proposed design is called as Integrated omni-directional Intake funnel, Natural fan, Straight diffuser, Splitter and Flange (I2NS2F) Design. To construct this I2NS2F configuration, four distinct wind turbines were developed: a) bare wind turbine, b) wind turbine diffuser design with single rotor turbine, c) bend diffuser, intake funnel, natural fan, splitter and flange and d) I2NS2F design. The proposed designs are numerically studied using MATLAB Simulink and Ansys Fluent. These designs are optimized by Random Search Optimization with Supervisory Control and Data Acquisition technique to evaluate the wind velocity and the performance is comparatively estimated. From this analysis, I2NS2F design achieves 53m/s of wind velocity at turbine region for 5.5m/s inlet wind and it could be considered as highest wind velocity than other three designs. It is evidently proved and concluded that proposed I2NS2F design augments natural wind, resulting in greater green power generation.

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Experimental and Numerical Studies on Aerodynamic Control of NACA 4418 Airfoil with a Rotating Cylinder

Cited by 9 publications

References 18 publications

Design, Analysis, and Wind Tunnel Evaluation of Novel Fabric-Covered Rotor Blades in Wind Energy Generation

Design, Analysis, and Wind Tunnel Evaluation of Novel Fabric-Covered Rotor Blades in Wind Energy Generation

Impact Tip Speed Ratio in Performance Analysis for Horizontal Axis Wind Turbine (HAWT) with Optimal Twist and Tapered (OPT) Blade Shape

Investigations on Integrated Funnel, Fan and Diffuser Augmented Unique Wind Turbine to Enhance the Wind Speed

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