scholarly journals Effect of Blade Pitch Angle on the Aerodynamic Characteristics of a Straight-bladed Vertical Axis Wind Turbine Based on Experiments and Simulations

Energies ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 1514 ◽  
Author(s):  
Yanzhao Yang ◽  
Zhiping Guo ◽  
Qing Song ◽  
Yanfeng Zhang ◽  
Qing’an Li
Keyword(s):  
Wind Turbine ◽  
Pitch Angle ◽  
Vertical Axis ◽  
Aerodynamic Characteristics ◽  
Vertical Axis Wind Turbine ◽  
Blade Pitch Angle

scholarly journals MODEL TURBIN ANGIN AIRFOIL NACA 4418 TERHADAP VARIASI BUKAAN SUDUT SUDU PADA KECEPATAN ANGIN BERBEDA

2019 ◽  
Vol 11 (2) ◽  
pp. 97-102
Author(s):  
Yusuf Dewantoro Herlambang ◽  
Budhi Prasetiyo ◽  
Supriyo Supriyo ◽  
Wahyono Wahyono ◽  
Teguh Harijono Mulud
Keyword(s):  
Wind Turbine ◽  
Pitch Angle ◽  
Vertical Axis ◽  
Speed Ratio ◽  
Vertical Axis Wind Turbine ◽  
Tip Speed Ratio ◽  
Blade Pitch Angle

Penelitian ini mengkaji Turbin Angin Sumbu Vertikal (Vertical Axis Wind Turbine) Aerofoil NACA 4418 yang memiliki diameter rotor 560  mm, panjang sudu 800 mm, jumlah sudu 3 buah, serta bahan sudu terbuat dari fiberglass. Selanjutnya menganalis karakteristik turbin angin rotor vertikal 3-sudu tersebut pada kecepatan angin berbeda 5 m/s, 6 m/s, 7 m/s, 8 m/s, dan 9 m/s dengan 5 buah model turbin angin dengan bukaan sudut sudu (blade pitch angle) bervariasi yaitu 00, 100, 200, 300, dan 400. Hasil pengujian turbin angin diperoleh rasio kecepatan sudu (Tip Speed Ratio) yang optimum sebesar 1,7 pada sudut sudu 100 dengan putaran turbin 321 rpm dan kecepatan angin 5,42 m/s. Daya mekanik optimum yang diperoleh adalah 19,4 W pada bukaan sudut sudu sebesar 200 dengan putaran turbin 381 serta kecepatan angin 6,4 m/s. Turbin menghasilkan koesifien daya (Coefficient of Power) optimum yang dihasilkan sebesar 0,202 dengan bukaan sudut sudu sebesar 100 dan putaran turbin 198 rpm, dan daya mekanik yang dihasilkan 8,5 Watt pada variabel pengujian kecepatan sebesar 5,42 m/s.

Numerical Study of Pitch Angle on H-Type Vertical Axis Wind Turbine

2012 ◽  
Vol 499 ◽  
pp. 259-264
Author(s):  
Qi Yao ◽  
Ying Xue Yao ◽  
Liang Zhou ◽  
S.Y. Zheng
Keyword(s):  
Wind Turbine ◽  
Pitch Angle ◽  
Numerical Study ◽  
Vertical Axis ◽  
Azimuth Angle ◽  
Power Coefficient ◽  
Cfd Model ◽  
Vertical Axis Wind Turbine ◽  
Sliding Mesh ◽  
Mesh Technique

This paper presents a simulation study of an H-type vertical axis wind turbine. Two dimensional CFD model using sliding mesh technique was generated to help understand aerodynamics performance of this wind turbine. The effect of the pith angle on H-type vertical axis wind turbine was studied based on the computational model. As a result, this wind turbine could get the maximum power coefficient when pitch angle adjusted to a suited angle, furthermore, the effects of pitch angle and azimuth angle on single blade were investigated. The results will provide theoretical supports on study of variable pitch of wind turbine.

Effect of trailing edge dual synthesis jets actuator on aerodynamic characteristics of a straight-bladed vertical axis wind turbine

Energy ◽  
2022 ◽  
Vol 238 ◽  
pp. 121792
Author(s):  
Peilin Wang ◽  
Qingsong Liu ◽  
Chun Li ◽  
Weipao Miao ◽  
Shuai Luo ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Vertical Axis ◽  
Aerodynamic Characteristics ◽  
Vertical Axis Wind Turbine ◽  
Trailing Edge

Aerodynamic Analysis for Camber Effect in Vertical Wind Turbine System

2011 ◽  
Author(s):  
Jinwook Kim ◽  
Dohyung Lee ◽  
Junhee Han ◽  
Sangwoo Kim
Keyword(s):  
Numerical Simulation ◽  
Wind Turbine ◽  
Vertical Axis ◽  
Aerodynamic Characteristics ◽  
Vertical Axis Wind Turbine ◽  
Horizontal Axis Wind Turbine ◽  
Low Wind Speed ◽  
Wind Turbine System ◽  
Physical Features ◽  
The Ideal

The Vertical Axis Wind Turbine (VAWT) has advantages over Horizontal Axis Wind Turbine (HAWT) that it allows less chance to be degraded independent of wind direction and turbine can be operated even at the low wind speed. The objective of this study is to analyze aerodynamics of the VAWT airfoil and investigate the ideal shape of airfoil, more specifically cambers. The analysis of aerodynamic characteristics with various cambers has been performed using numerical simulation with CFD software. As the numerical simulation discloses local physical features around wind turbine, aerodynamic performance such as lift, drag and torque are computed for single airfoil rotation and multiple airfoil rotation cases. Through this study more effective airfoil shape is suggested based vortex-airfoil interaction studies.

Computational Analysis of Airfoil Merging and its Effect on Performance of Lift Based Vertical Axis Wind Turbine

2016 ◽  
Author(s):  
Akshay Basavaraj
Keyword(s):  
Reynolds Number ◽  
Wind Turbine ◽  
Lift Coefficient ◽  
Turbine Blades ◽  
Vertical Axis ◽  
Aerodynamic Characteristics ◽  
Vertical Axis Wind Turbine ◽  
Low Wind Speed ◽  
Naca 0012 ◽  
Selection Of

In regions of low wind speed, overcoming the starting torque of a Vertical Axis Wind Turbine (VAWT) becomes a challenge aspect. In order to overcome this adversity, careful selection of airfoils for the turbine blades becomes a priority. This paper tries to address the issue utilizing an approach wherein by observing the effect of merging two airfoils. Two airfoils which are of varying camber and thickness are merged and their aerodynamic characteristics are evaluated using the software XFOIL 6.96. For a variation in angle of attack from 0 to 90°, aerodynamic analysis is done in order to observe the behavior of one quarter of the entire VAWT cycle. An objective function is developed so as to observe the maximum possible torque generated by these airfoils at Reynolds number varying from 15,000–120,000. Due to change in the value of CL observed at Low Reynolds Number using commercial CFD softwares, multiple objective functions are utilized to observe the behavior over a range of Reynolds number. An experimental co-relation between the cut-in velocity and the lift-coefficient of the airfoils is developed in order to predict the cut-in velocity of the interpolated airfoils. The airfoils used for this paper are NACA 0012, NACA 0018, FX 66 S196, Clark Y (smooth), PT 40, SD 7032, A 18, SD 7080, SG 6043 and SG 6040.

scholarly journals Kinematics of a vertical axis wind turbine with a variable pitch angle

2018 ◽  
Author(s):  
Mateusz Jakubowski ◽  
Roman Starosta ◽  
Pawel Fritzkowski
Keyword(s):  
Wind Turbine ◽  
Pitch Angle ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Variable Pitch

Aerodynamic characteristics of Straight-bladed Vertical Axis Wind Turbine with a curved-outline wind gathering device

2020 ◽  
Vol 203 ◽  
pp. 112249 ◽  
Author(s):  
Yan Li ◽  
Shouyang Zhao ◽  
Chunming Qu ◽  
Guoqiang Tong ◽  
Fang Feng ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Vertical Axis ◽  
Aerodynamic Characteristics ◽  
Vertical Axis Wind Turbine

scholarly journals Experimental investigation of a variable geometry vertical axis wind turbine

2020 ◽  
pp. 0309524X2093513
Author(s):  
Simon A Prince ◽  
Carmine Badalamenti ◽  
Dimitar Georgiev
Keyword(s):  
Experimental Study ◽  
Wind Turbine ◽  
Pitch Angle ◽  
Vertical Axis ◽  
Reynolds Numbers ◽  
Variable Geometry ◽  
Vertical Axis Wind Turbine ◽  
Wind Tunnel Experiments ◽  
Electrical Generator ◽  
Turbine Design

An experimental study is presented on the performance of a vertical axis wind turbine with variable blade geometry of the design developed by Austin Farrah. This is experimentally compared with the performance of a correspondingly sized Bach-type Savonius turbine using the same electrical generator and measurement instrumentation in a wind tunnel. Experiments were performed for Reynolds numbers, based on blade chord, in the range 5 × 103 to 1 × 105, and for blade settings between −40° and +40o. The study shows that for the tip speed ratios that have been investigated, the Farrah vertical axis wind turbine design can only marginally outperform a corresponding two-bladed Bach-type Savonius turbine and then only when its blades are set to 40° pitch angle. The presence of a small inner cylinder, which rotates with the turbine, does not enhance its performance due to the fact that it is immersed in an extensive column of relatively static air.

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