Review of Numerical and Experimental Studies on Flow Characteristics around A Straight-bladed Vertical Axis Wind Turbine and Its Performance Enhancement Strategies

2021 ◽  
Author(s):  
Xiaojing Sun ◽  
Donghai Zhou
Keyword(s):  
Wind Turbine ◽  
Performance Enhancement ◽  
Experimental Studies ◽  
Flow Characteristics ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine

scholarly journals CFD for Helical Type Vertical Axis Wind Turbine

2019 ◽  
Vol 9 (2S4) ◽  
pp. 474-476
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Computer Aided Design ◽  
Flow Characteristics ◽  
Vertical Axis ◽  
Urban Environments ◽  
Vertical Axis Wind Turbine ◽  
Wind Turbine System ◽  
Twisted Blade ◽  
Aided Design

Vertical axis wind turbines are most effective for home energy generation especially in urban environments. Wind energy creates a stand-alone energy source that is relied on any place. The main criteria for this work is the design of micro wind turbines for all kinds of applications. Design of Twisted Blade Micro-Wind Turbine system is accomplished using computer aided design with Computational Fluid Dynamics (CFD). The flow characteristics in the wind turbine blade were analyzed by varying its twist ratio. The wind turbines with vertical axis utilize the wind from any direction with no yaw mechanism. The risk of blade ejection besides catching wind from all the directions is avoided by using the helical tye vertical axis wind turbine.

Investigation on Flow Characteristics and Performance of a Vertical Axis Wind Turbine With Deflector Plates

2019 ◽  
Author(s):  
K. Karthik Selva Kumar ◽  
Vinayak Kulkarni ◽  
Niranjan Sahoo
Keyword(s):  
Wind Turbine ◽  
Computational Study ◽  
Flow Characteristics ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Near Wake ◽  
Flow Phenomenon ◽  
Sliding Mesh ◽  
And Performance ◽  
Accelerated Flow

Abstract In this article, a 3D computational study has been performed to understand the flow phenomenon over the vertical axis wind turbine with a three-bladed NACA0021. The rotary motion of the VAWT simulated with sliding mesh techniques with reference to the SST-Kω turbulence model using the CFD software. The observed results were found to be having a significant improvement in the enhancement of the power output. Also, the investigation was move forwarded to understand the flow characteristics of the VAWT with the presence of deflector plates in different orientation at the upstream conditions. The present of deflector plates creates an augmented flow phenomenon which creates an accelerated flow at the near wake region, causing a significant improvement in the coefficient of power of the wind turbine.

Vertical axis wind turbine performance enhancement using plasma actuators

2012 ◽  
Vol 37 (1) ◽  
pp. 345-354 ◽  
Author(s):  
David Greenblatt ◽  
Magen Schulman ◽  
Amos Ben-Harav
Keyword(s):  
Wind Turbine ◽  
Performance Enhancement ◽  
Vertical Axis ◽  
Plasma Actuators ◽  
Vertical Axis Wind Turbine ◽  
Turbine Performance

Effect of geometric parameters of Gurney flap on performance enhancement of straight-bladed vertical axis wind turbine

2021 ◽  
Vol 165 ◽  
pp. 464-480
Author(s):  
Haitian Zhu ◽  
Wenxing Hao ◽  
Chun Li ◽  
Shuai Luo ◽  
Qingsong Liu ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Performance Enhancement ◽  
Vertical Axis ◽  
Geometric Parameters ◽  
Vertical Axis Wind Turbine ◽  
Gurney Flap

Methods Development for Determining the Aerodynamic Characteristics of Vertical Exist of Wind Turbine

2014 ◽  
Vol 630 ◽  
pp. 79-84
Author(s):  
Vitaliy Lupoviy ◽  
Andrej Papchenko
Keyword(s):  
Numerical Simulation ◽  
Wind Turbine ◽  
Air Flow ◽  
Flow Characteristics ◽  
Vertical Axis ◽  
Aerodynamic Characteristics ◽  
Vertical Axis Wind Turbine ◽  
Power Comparison ◽  
Methods Development ◽  
Working Section

Description of works for development of methods for determining the aerodynamic characteristics of vertical axis wind turbine is given in this article. Algorithm of aerodynamic tunnel designing and mounting is given. Compare air flow characteristics in working section of tunnel obtained by numerical simulation and probing. Describe the method of determining windwheel power. Comparison of the turbine characteristics obtained by this method with experimental dependences obtained earlier

scholarly journals Power Enhancement of a Vertical Axis Wind Turbine Equipped with an Improved Duct

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5780
Author(s):  
Mohammad Hassan Ranjbar ◽  
Behnam Rafiei ◽  
Seyyed Abolfazl Nasrazadani ◽  
Kobra Gharali ◽  
Madjid Soltani ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Flow Characteristics ◽  
Maximum Velocity ◽  
Leading Edge ◽  
Vertical Axis ◽  
Power Coefficient ◽  
Vertical Axis Wind Turbine ◽  
Numerical Solver ◽  
Main Components

Efforts to increase the power output of wind turbines include Diffuser Augmented Wind Turbines (DAWT) or a shroud for the rotor of a wind turbine. The selected duct has three main components: a nozzle, a diffuser, and a flange. The combined effect of these components results in enriched upstream velocity for the rotor installed in the throat of the duct. To obtain the maximum velocity in the throat of the duct, the optimum angles of the three parts have been analyzed. A code was developed to allow all the numerical steps including changing the geometries, generating the meshes, and setting up the numerical solver simultaneously. Finally, the optimum geometry of the duct has been established that allows a doubling of the flow velocity. The flow characteristics inside the duct have also been analyzed in detail. An H-Darrieus Vertical Axis Wind Turbine (VAWT) has been simulated inside the optimized duct. The results show that the power coefficient of the DAWT can be enhanced up to 2.9 times. Deep dynamic stall phenomena are captured perfectly. The duct advances the leading-edge vortex generation and delays the vortex separation.

scholarly journals Hardware in the loop simulative setup for testing the combined heat power generating wind turbine

2021 ◽  
Vol 12 (1) ◽  
pp. 499
Author(s):  
Ihor Shchur ◽  
Vsevolod Shchur ◽  
Ihor Bilyakovskyy ◽  
Mykhailo Khai
Keyword(s):  
Wind Turbine ◽  
Induction Motor ◽  
Experimental Studies ◽  
Vertical Axis ◽  
Hardware In The Loop ◽  
Heat Power ◽  
Vertical Axis Wind Turbine ◽  
Wind Energy Conversion ◽  
Wind Speeds ◽  
Good Agreement

This paper describes the design and implementation of hardware in the loop (HIL) system based on induction motor wind turbine emulator for the study of the operation of a combined heat-power (CHP) generating wind energy conversion system (WECS). The energy generation part of the WECS consists of two specially designed generators that are placed on a common vertical axis, which is connected to the induction motor through a gearbox. The first generator is an electric two-armature axial PMSG and the second one is a thermal electromagnetic retarder. The software part of the HIL setup simulates the interaction of the wind flow with a vertical axis wind turbine (VAWT) and is implemented in a programmable logic controller based on the model developed in the MATLAB/Simulink. The results of experimental studies of the CHP WECS with the created HIL simulative setup at both constant and turbulent wind speeds have shown good agreement with the corresponding results of computer simulation. The created HIL simulative setup will be used for the development of an energy management system for CHP WECS.

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