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A bladeless wind turbine utilizes vortex formation to extract energy from the wind. Vortex formation are small swirls of air which occur as a result of the geometric shape of the device. This study designed a bladeless wind turbine which incorporates a structural support at a distance offset from the center axis of the cylindrical mast. Springs wer...
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Citations
... Where airborne devices like wings [7], kites [8], or aerial vehicles [9] are connected through tethers to ground control units to produce energy through the tension produced by the airborne device to the tether. Other innovations include producing energy through bladeless wind turbines which utilize the vortex formation for wind energy production [10], [11]. ...
Multi-Rotor System (MRS) wind turbines provide a competitive alternative to large-scale wind turbines. It addresses many of the drawbacks of large wind turbines including transportation, installation, and maintenance difficulties for large blades. In this work, three different MRS configurations are studied and compared to the NREL 5 MW turbine. A twin, tri, and quad-rotor configurations are scaled-down from the original turbine, such that the total turbine capacity of each configuration is 5 MW. Aerodynamic performance has been calculated using an in-house Blade Element Momentum (BEM) code. A preliminary design for the support structure has been made and analyzed. The deflection slope angle for the tower-top of MRS configurations have values of 0.54 o-0.6 o as compared to the single-rotor reference turbine with a value of 0.55 o. The twin, tri, and quad-rotor configurations provide a total reduction in mass of 25.6%, 16.9%, and 22.5% respectively. Although the inertial and aerodynamic loads decrease as the number of rotors on an MRS increases, but the support structure should be considered before selecting the appropriate number of rotors.
... This type of turbine does not have the problems of the previous generation turbines, so to optimize VBT [7], many researchers around the world have started experimental and research studies. Antony and Boucher [8] have studied the effective parameters on the output power of the bladeless turbine. They showed that for higher and lower wind speeds, the turbine vibration parameters are constant. ...
Energy harvesting from wind turbines has been explored by researchers for more than a century from conventional turbines up to the latest bladeless turbines. Amongst these bladeless turbines , vortex bladeless wind turbine (VBT) harvests energy from oscillation of a turbine body. Due to the novelty of this science and the widespread researches around the world, one of the most important issues is to optimize and predict produced power. To enhance the produced output electrical power of VBT, the fluid-solid interactions (FSI) were analyzed to collect a dataset for predicting procedure. Long short-term memory (LSTM) method has been used to predict the produced power of VBT from the collected data. The reason of choosing LSTM from various artificial neural network methods is that the parameters of VBT study are all time-dependent and the LSTM is one of the most accruable algorithms for predicting time series data. In order to find the relationship between the parameter and the variables used in this research, a correlation matrix was presented. According to the value of 0.3 for the root mean square error (RMSE), a comparative analysis between the simulation results and its prediction shows that the LSTM method is very accurate for these types of research. Furthermore, the LSTM method has significantly reduced the computation time so that the prediction time of desired values has been reduced from an average of 2 and a half hours to two minutes. Also, one of the most important achievements of this study is to suggest a mathematical relation of VBT output power which helps to extend it in a different size of VBT with a high range of parameter variations.
... This type of turbine does not have the problems of the previous generation turbines, so to optimize VBT [7], many researchers around the world have started experimental and research studies. Antony and Boucher [8] have studied the effective parameters on the output power of the bladeless turbine. They showed that for higher and lower wind speeds, the turbine vibration parameters are constant. ...
From conventional turbines to cutting-edge bladeless turbines, energy harvesting from wind has been well explored by researchers for more than a century. The vortex bladeless wind turbine (VBT) is considered an advanced design that alternatively harvests energy from oscillation. This research investigates enhancing the output electrical power of VBT through simulation of the fluid-solid interactions (FSI), leading to a comprehensive dataset for predicting procedure and optimal design. Hence, the long short-term memory (LSTM) method, due to its time-series prediction accuracy, is proposed to model the power of VBT from the collected data. To find the relationship between the parameters and the variables used in this research, a correlation matrix is further presented. According to the value of 0.3 for the root mean square error (RMSE), a comparative analysis between the simulation results and their predictions indicates that the LSTM method is suitable for modeling. Furthermore, the LSTM method has significantly reduced the computation time so that the prediction time of desired values has been reduced from an average of two and a half hours to two minutes. In addition, one of the most important achievements of this study is to suggest a mathematical relation of output power, which helps to extend it in different sizes of VBT with a high range of parameter variations.
... Examples of airborne wind energy (AWE) are the kite wind power systems (Dief, et al. 2018) (Rushdi, et al. 2020), tethered wing power systems (Kakavand and Nikoobin 2021), and airborne vehicles (Makani n.d.). Some other trends also include bladeless wind turbines (Adeyanju and Boucher 2020) (Francis, Umesh, and Shivakumar 2021). However, wind turbines are still the most common and most installed wind power systems. ...
Wind energy is one of the world's current leading renewable energy resources. One of the major aspects of studying wind turbines is the structural dynamics for the turbine structure including blades and support structure. In the current work, the blades of the Advanced Wind Turbine (AWT-27) are investigated in a dynamic approach. Different wind fields have been generated for the study to provide different Design Load Conditions (DLCs). Three laminar wind velocities of 5 m/s, 12 m/s, and 17 m/s were simulated. Turbulent wind flow fields have also been generated at the three standard classes A, B and C of high, medium, and low turbulence intensities respectively. The generated wind fields are used as inputs to calculate the aerodynamic loads for each wind condition using the Blade Element Momentum (BEM) theory. Aerodynamic loads have been calculated, namely, the shear force on five different locations along the blade length. Results of the simulation are summarized such that the shear forces at the blade root, 30%, 50%, 70% of the blade length are known for each wind condition. The summary serves as a guide for further optimization of the blade structural design.
