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Journal articles on the topic 'Turbine Darrieus'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Kadir, Muhammad Abdul. "PENGARUH SUDUT KEMIRINGAN DAN LEBAR SUDU TERHADAP KINERJA TURBIN DARRIEUS DENGAN PROFIL SUDU NACA 0021." KURVATEK 4, no. 1 (2019): 7–13. http://dx.doi.org/10.33579/krvtk.v4i1.1135.

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Abstract There are many low head hydro power energy resources potential in Indonesia that have not been optimally in use. The main obstacles is that this kind of turbines have low pawer factor and low efficiencies. One of the low head hydro power turbines is Darrieus turbin. The excellence of Darrieus turbine is its simply and has high strength blades. The verry important parameters that inflence to the turbine performance are width, angle of attack and cross section profile of the blades. The objective of the research is to investigate the influences of blades width and blades angle of attack

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2

Wardani, Citra Sari, Dwi Anung Nindito, and Allan Restu Jaya. "Inovasi Dan Desain Turbin Hidrokinetik Darrieus Berdasarkan Bentuk Distribusi Kecepatan Aliran." Media Ilmiah Teknik Sipil 9, no. 1 (2020): 32–43. http://dx.doi.org/10.33084/mits.v9i1.1771.

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Darrieus turbine use blades with a hydrofoil shape, so the rotational ability is influenced by lift force. This caused the initial rotation capability to be very low when compared to the drag turbine type. The flow velocity distribution in the vertical direction indicates a small cross-sectional speed of flow approaching the base of the flow channel, then rising towards the surface. Darrieus Spinning Top turbine is the result of innovation and design based on the concept of flow velocity distribution. Darrieus Spinning Top turbine’s blade shapes are circular-arc and straight-line, adjusting fl

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3

Hakim, Luthfi, Achmad Rijano, and Mochamad Muzaki. "Analisis Regresi Kecepatan Angin Terhadap Daya Turbin Angin Jenis VAWT Tipe Darrieus-Savonius." Jurnal Energi dan Teknologi Manufaktur (JETM) 1, no. 02 (2018): 15–20. http://dx.doi.org/10.33795/jetm.v1i02.16.

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The Darrieus-Savonius (DS) wind turbine has been widely developed with the aim of improving turbine performance that has been designed. DS wind turbine is a combination of two type of wind turbines, that is Darrieus and Savonius turbine, both turbines are intentionally developed In order to get self-starting on turbine Savonius with low wind speed and able to extract the speed of engine into energy well at high wind speed through Cherrie Darrieus. This study was conducted to analyze the performance of the DS turbine in the wind speed to be energized through the turbine rotation and power to be

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4

Effendi, Rian, and Rudi Siswanto. "PROSES MANUFAKTUR TURBIN ANGIN SUMBU VERTIKAL TIPE DARRIEUS." JTAM ROTARY 1, no. 2 (2019): 117. http://dx.doi.org/10.20527/jtam_rotary.v1i2.1742.

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Wind turbine is one of the tools yamg work to take advantage of wind allergy. Wind turbines based on the type of rotor there are two types of Darrieus wind turbines and Savonius wind turbines. In the manufacturing process using a type of wind turbine type Darrieus. The darrieus turbine is a wind turbine that utilizes the lift style on the rotor blade. This turbine requires initial energy to spin. The formulation of the problem in making this wind turbine is How does the manufacturing process of vertical turbine type darrieus wind turbine and How much is the cost budget on the manufacturing pro

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Mohan Kumar, Palanisamy, Krishnamoorthi Sivalingam, Teik-Cheng Lim, Seeram Ramakrishna, and He Wei. "Strategies for Enhancing the Low Wind Speed Performance of H-Darrieus Wind Turbine—Part 1." Clean Technologies 1, no. 1 (2019): 185–204. http://dx.doi.org/10.3390/cleantechnol1010013.

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Small wind turbines are key devices for micro generation in particular, with a notable contribution to the global wind energy sector. Darrieus turbines, despite being highly efficient among various types of vertical axis turbines, received much less attention due to their starting characteristics and poor performance in low wind speeds. Radically different concepts are proposed as a potential solution to enhance the performance of Darrieus turbine in the weak wind flows, all along the course of Darrieus turbine development. This paper presents a comprehensive review of proposed concepts with t

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Puspitasari, Dewi, and Kaprawi Sahim. "Effect of Savonius blade height on the performance of a hybrid Darrieus-Savonius wind turbine." Journal of Mechanical Engineering and Sciences 13, no. 4 (2019): 5832–47. http://dx.doi.org/10.15282/jmes.13.4.2019.09.0465.

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A vertical hybrid turbine commonly consists of a Darrieus and Savonius rotor where the Savonius is inside Darrieus turbine. This paper describes the experimental study of hybrid Darrieus-Savonius wind turbines by variation in Savonius blade height. In this case, the effect of the blade height of the Savonius blade was studied experimentally in a subsonic wind tunnel. The effect of the height of a Savonius blade relative to that of Darrieus called blade height ratios δ was investigated to know the hybrid turbine performance. The performance is represented by power and torque coefficient. The re

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7

Sahim, Kaprawi, Dyos Santoso, and Dewi Puspitasari. "Investigations on the Effect of Radius Rotor in Combined Darrieus-Savonius Wind Turbine." International Journal of Rotating Machinery 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/3568542.

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Renewable sources of energy, abundant in availability, are needed to be exploited with adaptable technology. For wind energy, the wind turbine is very well adapted to generate electricity. Among the different typologies, small scale Vertical Axis Wind Turbines (VAWT) present the greatest potential for off-grid power generation at low wind speeds. The combined Darrieus-Savonius wind turbine is intended to enhance the performance of the Darrieus rotor in low speed. In combined turbine, the Savonius buckets are always attached at the rotor shaft and the Darrieus blades are installed far from the

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8

Sahim, Kaprawi, Dyos Santoso, and Agus Radentan. "Performance of Combined Water Turbine with Semielliptic Section of the Savonius Rotor." International Journal of Rotating Machinery 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/985943.

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The Darrieus turbine is a suitable power generation in free stream flow because it is simple in construction, but it has the disadvantage of its small starting torque. The Savonius turbine has a high starting torque but the efficiency is smaller than that of Darrieus turbine. To improve the starting torque of Darrieus turbine, the Savonius buckets are introduced into the Darrieus turbine and the combined turbine is called Darrieus-Savonius turbine. In this study, three semielliptic sections of aspect ratio 0.8 were used for Savonius bucket while the Darrieus blade used three wings of airfoil N

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9

Mohan Kumar, Palanisamy, Mohan Ram Surya, Krishnamoorthi Sivalingam, Teik-Cheng Lim, Seeram Ramakrishna, and He Wei. "Computational Optimization of Adaptive Hybrid Darrieus Turbine: Part 1." Fluids 4, no. 2 (2019): 90. http://dx.doi.org/10.3390/fluids4020090.

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Darrieus-type Vertical Axis Wind Turbines (VAWT) are promising for small scale decentralized power generation because of their unique advantages such as simple design, insensitive to wind direction, reliability, and ease of maintenance. Despite these positive aspects, poor self-starting capability and low efficiency in weak and unsteady winds deteriorate further development. Adaptive Hybrid Darrieus Turbine (AHDT) was proposed by the author in the past study as a potential solution to enhance low wind speed characteristics. The objective of the current research is to optimize the parameters of

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10

Qu, Jian Jun, Ming Wei Xu, and Yi Mei. "Aerodynamic Model of Vertical Axis Wind Turbine with Wind Speed Self-Adapting in Drag-Mode." Advanced Materials Research 347-353 (October 2011): 340–43. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.340.

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The structure of vertical axis wind turbine with wind speed-adapting is based on Darrieus straight-bladed turbine. It features that its blades are composed of movable and fixed blades. Through the opening and closing of the movable blades to adapt to the wind speed automatically, the turbine not only can start up in low wind speed, but also realize the conversion from drag-mode to lift-mode. Due to the special structure, the aerodynamic model of this turbine in drag-mode is different from that of Savonius and Darrieus turbine. So in this article, the aerodynamic model of this turbine in drag-m

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Saryazdi, Seyed Mohammad E., and Mehrdad Boroushaki. "2D Numerical Simulation and Sensitive Analysis of H-Darrieus Wind Turbine." International Journal of Renewable Energy Development 7, no. 1 (2018): 23. http://dx.doi.org/10.14710/ijred.7.1.23-34.

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Recently, a lot of attention has been devoted to the use of Darrieus wind turbines in urban areas. The aerodynamics of a Darrieus turbine are very complex due to dynamic stall and changing forces on the turbine triggered by changing horizontal angles. In this study, the aerodynamics of H-rotor vertical axis wind turbine (VAWT) has been studied using computational fluid dynamics via two different turbulence models. Shear stress transport (SST) k-ω turbulence model was used to simulate a 2D unsteady model of the H-Darrieus turbine. In order to complete this simulation, sensitivity analysis of th

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12

Iliev, Rossen. "A CFD analysis of the performance characteristics of different Darrieus turbine runners." E3S Web of Conferences 207 (2020): 02012. http://dx.doi.org/10.1051/e3sconf/202020702012.

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This paper presents the capabilities of analyzing different Darrieus wind turbine runners with the computer program Ansys Fluent. A K-omega turbulence model was used in the case of a two-dimensional flow with a suitable computational grid around the profile of the blades. The obtained theoretical performance characteristics were validated on test rig №7 (Wind Turbines) in the Laboratory of Hydropower and Hydraulic Turbomachinery (HEHT Lab) at the Technical University of Sofia. The data analysis shows that it’s possible to predict the performance characteristic and the optimum operating regime

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13

Du, Longhuan, Grant Ingram, and Robert G. Dominy. "A review of H-Darrieus wind turbine aerodynamic research." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 23-24 (2019): 7590–616. http://dx.doi.org/10.1177/0954406219885962.

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The H-Darrieus vertical axis turbine is one of the most promising wind energy converters for locations where there are rapid variations of wind direction, such as in the built environment. The most challenging considerations when employing one of these usually small machines are to ensure that they self-start and to maintain and improve their efficiency. However, due to the turbine's rotation about a vertical axis, the aerodynamics of the turbine are more complex than a comparable horizontal axis wind turbine and our knowledge and understanding of these turbines falls remains far from complete

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14

Alqurashi, Faris, and M. H. Mohamed. "Aerodynamic Forces Affecting the H-Rotor Darrieus Wind Turbine." Modelling and Simulation in Engineering 2020 (January 11, 2020): 1–15. http://dx.doi.org/10.1155/2020/1368369.

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Darrieus wind rotor is a vertical axis wind turbine that is a very promising kind of wind converters at remote and domestic locations that have soft and weak wind potential and speed, but from the quantitative comparison with horizontal axis wind turbines, this type of turbines has a weak performance. Additional researches are still needed to develop its efficiency to identify all the requirements of the generated power in low power demands. The aim of the current investigation is to analyze all the acting forces on the main parts of Darrieus rotor over the rotations as well as in maintenance

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Кауаn, V. "DARRIEUS TYPE WIND TURBINE WITH CONTROLLED BLADES." Eurasian Physical Technical Journal 17, no. 2 (2020): 69–72. http://dx.doi.org/10.31489/2020no2/69-72.

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The results of studies on possibility of increasing efficiency in the use of wind energy and improving the dynamic characteristics of Darrieus wind turbine with straight blades are described. It is shown how the values of torque on the rotor shaft may be optimized by controlling the orientation of the turbine blades relative to the oncoming flow. Control of blades was provided with a cylindrical track of the special form in plan. The track form allowed to establish optimum angle of attack on each site of blade circular trajectory. It allowed to increase power coefficient Cp by 1.5 times and to

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16

Chua, Bih Lii, Mohd Suffian Misaran, Yan Yan Farm, Mizanur Rahman, and Benjoe Eldana Barahim. "Development of Mixed Vertical Axis Wind Turbine (MVAWT) for Low Wind Condition." Applied Mechanics and Materials 660 (October 2014): 811–15. http://dx.doi.org/10.4028/www.scientific.net/amm.660.811.

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Small-scaled renewable energy generation such as micro-hydro and domestic solar panel has become the recent trend of research in order to achieve sustainable energy generation and to eliminate the reliance of geographical selection and large farm area. As for the case of wind energy, a wind turbine that can operate at low wind condition are desirable. This paper presents a mixed design for Vertical Axis Wind Turbine comprises of Savonius and Darrieus rotors, being assembled together as a single rotor turbine. The mixed wind turbine model (MVAWT) was fabricated and tested in our lab as prove of

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17

Sahim, Kaprawi, Kadafi Ihtisan, Dyos Santoso, and Riman Sipahutar. "Experimental Study of Darrieus-Savonius Water Turbine with Deflector: Effect of Deflector on the Performance." International Journal of Rotating Machinery 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/203108.

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The reverse force on the returning blade of a water turbine can be reduced by setting a deflector on the returning blade side of a rotor. The deflector configuration can also concentrate the flow which passes through the rotor so that the torque and the power of turbine can be considerably increased. The placing of Savonius in Darrieus rotor is carried out by setting the Savonius bucket in Darrieus rotor at the same axis. The combination of these rotors is also called a Darrieus-Savonius turbine. This rotor can improve torque of turbine. Experiments are conducted in an irrigation canal to find

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18

Wicaksono, Hangga, Sugeng Hadi Susilo, Bayu Pranoto, and Muhammad Fakhruddin. "Initial Rotation Characteristic Investigation of a Hybrid Savonius - Darrieus Wind Turbine using 6 DOF Computational Fluid Dynamics." Mekanika: Majalah Ilmiah Mekanika 20, no. 1 (2021): 9. http://dx.doi.org/10.20961/mekanika.v20i1.47577.

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The inconsistency of the wind flow considered as one of the factors which tend to decrease the performance of the wind turbine. This paper proposes a further analysis of the initial rotation characteristic of a hybrid Savonius - Darrieus wind turbine. The addition of the Darrieus blade intends to increase the aerodynamic stability of the overlapping Savonius turbine. This study implements 2D CFD transient analysis using the 6DOF methods in 0<sup>0</sup>, 30<sup>0</sup>, 60<sup>0</sup>, and 90<sup>0</sup> Darrieus blade position along with 2 m/s,

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19

Weber, Johannes, Stefan Becker, Christoph Scheit, Jens Grabinger, and Manfred Kaltenbacher. "Aeroacoustics of Darrieus Wind Turbine." International Journal of Aeroacoustics 14, no. 5-6 (2015): 883–902. http://dx.doi.org/10.1260/1475-472x.14.5-6.883.

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20

Ponta, Fernando L., Alejandro D. Otero, and Lucas Lago. "The VGOT Darrieus wind turbine." International Journal of Global Energy Issues 21, no. 3 (2004): 303. http://dx.doi.org/10.1504/ijgei.2004.005774.

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21

Diaurahman, Diaurahman, and Rudi Siswanto. "PERENCANAAN KONSTRUKSI DAN ELEMEN MESIN TURBIN ANGIN SUMBU VERTIKAL TYPE DARRIEUS." Scientific Journal of Mechanical Engineering Kinematika 1, no. 2 (2016): 99–112. http://dx.doi.org/10.20527/sjmekinematika.v1i2.30.

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Wind energi is one of the alternative energi that can be utilized for various purposes to replace the source of fossil fuel energi. The Darrieus wind turbine includes a vertikal axis wind turbine driven by lifting force from the blade. Planning of the axis vertikal type Darrieus wind turbine is aimed to calculate the elements of Darrieus machine and make design of vertikal axis component of Darrieus vertikal turbine using Marzuki (2016) research data about NACA 2415 blend analysis with variation of blade and angle of attack. The planning method used is based on the calculation of construction

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22

Ghiasi, Pedram, Gholamhassan Najafi, Barat Ghobadian, and Ali Jafari. "Analytical and Numerical Solution for H-type Darrieus Wind Turbine Performance at the Tip Speed Ratio of Below One." International Journal of Renewable Energy Development 10, no. 2 (2020): 269–81. http://dx.doi.org/10.14710/ijred.2021.33169.

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H-type Darrieus vertical axis wind turbines (VAWT) have omnidirectional movement capability and can get more power compared to other VAWTs at high tip speed ratios (𝜆). However, its disadvantages are self-starting inability and low generated power at 𝜆 less than 1. The performance of H-type Darrieus wind turbine at 𝜆<1 was studied using double multiple stream tube (DMST) model and two-dimensional computational fluid dynamic (CFD) simulation. In CFD simulation, the Unsteady Reynolds Averaged Navier-Stokes (URANS) equations were used and the turbulence model was solved with SST k-ω model. The

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Zhang, Runqiang, Zhenwei Huang, Lei Tan, Yuchuan Wang, and Erqi Wang. "Energy Performance and Radial Force of Vertical Axis Darrieus Turbine for Ocean Energy." Energies 13, no. 20 (2020): 5412. http://dx.doi.org/10.3390/en13205412.

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Vertical axis Darrieus turbine is the key component for ocean energy conversion and utilization. In the present work, the energy performance, flow pattern, and radial force for a vertical axis Darrieus turbine were investigated. The experimental measurements and numerical simulations were in good agreement, which validates the accuracy and reliability of the numerical method. The results showed that the power coefficient gradually increased with the increase of tip speed ratio λ, and the power coefficient had three peaks in a revolution of runner due to three blades. The complex vortex induced

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Ramlee, Muhamad Fadhli, Ahmad Fazlizan, and Sohif Mat. "Performance Evaluation of H-Type Darrieus Vertical Axis Wind Turbine with Different Turbine Solidity." Journal of Computational and Theoretical Nanoscience 17, no. 2 (2020): 833–39. http://dx.doi.org/10.1166/jctn.2020.8726.

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Among renewable energy resources, wind energy is one of the best alternative for power generation. Recently, vertical axis wind turbine (VAWT) received renewed interest as small-scale wind energy converter due to its suitability for urban application, where the wind condition is known to be unsteady and turbulence. Amongst various type of VAWTs, H-type Darrieus rotor has become more popular, thanks to its simple construction features, resulting to low manufacturing and installation cost. The aim of this paper is to evaluate numerically the power performance of straight-bladed Darrieus VAWT wit

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Bianchini, Alessandro, Giovanni Ferrara, Lorenzo Ferrari, and Sandro Magnani. "An Improved Model for the Performance Estimation of an H-Darrieus Wind Turbine in Skewed Flow." Wind Engineering 36, no. 6 (2012): 667–86. http://dx.doi.org/10.1260/0309-524x.36.6.667.

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Small turbines are considered one of the most promising technologies for an effective diffusion of renewable energy sources in new installation contexts with a high degree of integration with human activity (e.g. the urban environment). In these new installations, however, the real working conditions can be far from the nominal ones. In particular, the turbine functioning can be noticeably affected by misalignments between the oncoming flow and the axis of the rotor; differently from horizontal-axis wind turbines, whose performance is decreased by a skew angle, H-Darrieus turbines are thought

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Harianto, Harianto. "STUDI SIMULASI CFD PENGARUH LEBAR CORD SUDU NACA A 0015 TERHADAP POWER FACTOR TURBIN DARIEUS." KURVATEK 4, no. 1 (2019): 15–23. http://dx.doi.org/10.33579/krvtk.v4i1.1136.

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AbstrakDiseluruh dunia khususnya di Indonesia saat sedang menghadapi permasalahan kebutuhan energi yaitu disebabkan oleh meningkatnya kebutuhan energi setiap tahunnya yang sejalan dengan perkembangan industri, jumlah penduduk dan aktifitas manusia, sementara cadangan sumber energi bahan bakar minyak semakin menipis. Pengembangan sumber energi alternatip saat ini adalah sumber energi terbarukan yang diantaranya meliputi Solar cell, Turbin energi panas bumu, Turbin energi bayu , dan Turbin energi air . Turbin air Darrieus sumbu vertikal merupakan salah satu turbin air yang berpotensi untuk dikem

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Mon, Thuzar, and Supakit Worasinchai. "Performance modelling of the Darrieus wind turbine." E3S Web of Conferences 302 (2021): 01001. http://dx.doi.org/10.1051/e3sconf/202130201001.

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Three-dimensional numerical investigation of the Darrieus wind turbines equipped with different aerofoils is presented in this paper. In the modelling, the computational domain was divided into three different domains and they are blade, rotor, and tunnel domains. A cylindrical domain was created to cover the blade area so that a fine mesh can be applied. The Computational Fluid Dynamics (CFD) was employed to solve and analyze the flow field around the turbine. The Menter Shear Stress turbulence model was chosen in this investigation. Boundary conditions applied were velocity at the inlet, pre

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Hammoudi, Zaid, Ikram El Abbassi, Rafik Absi, and A. Moumen Darcherif. "CFD based analysis of flow-driven vertical axis hydrokinetic turbines: blade hydrofoil and interactions effects." E3S Web of Conferences 170 (2020): 01016. http://dx.doi.org/10.1051/e3sconf/202017001016.

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In last years, interest in hydrokinetic energy conversion (HEC) technology has grown. However, HEC technology requires advancements to become successful for practical in-situ conditions. In this study we investigated the Darrieus type vertical axis hydrokinetic turbines (HKT). Simulations are carried out using commercial CFD package to study the hydrodynamic behavior of a three bladed turbine. Two HKT with same solidity equal to 0.17 were considered, a 1st with symmetric-NACA0018 blade hydrofoils and a 2nd with cambered-NACA4415 blades. Our simulations show a shift in instantaneous torque coef

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Sun, Lam, Dai, and Hamill. "Prediction of Seabed Scour Induced by Full-Scale Darrieus-Type Tidal Current Turbine." Journal of Marine Science and Engineering 7, no. 10 (2019): 342. http://dx.doi.org/10.3390/jmse7100342.

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Scour induced by a Darrieus-type tidal current turbine was investigated by using a joint numerical and experimental method with emphasis on the scour process of a full-scale turbine. This work proposes a new numerical method to estimate turbine scour developments, followed by model validation through experimental data in the initial stage. The small-scale numerical model was further extended to a full-scale model for the prediction of turbine scour. The numerical model consists of (1) k-ω turbulence closure, (2) a sediment transport model, and (3) a sediment slide model. The transient-state mo

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Alfian, Mizar, Poppy Puspitasari, Ahmad Taufiq, Muhammad Trifiananto, and A. Aripriharta. "An experimental test of the effect of cup diameter on the power performance of novel design HC-type VAWT." Journal of Applied Engineering Science 18, no. 4 (2020): 631–36. http://dx.doi.org/10.5937/jaes0-25010.

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Wind energy is one solution to overcome the energy problem in Indonesia. This study aimed to analyze the effect of cup diameter on the power performance of an HC-type vertical axis wind turbine (VAWT). The wind turbine used a combination of an H-type Darrieus wind turbine and a type-C rotor VAWT. The Darrieus HC-rotor wind turbine blade has a height H = 800 mm and diameter D = 800 mm with C-rotor variations on the tip with diameters of 76,2, 101,6, and 152,4 mm. The wind tunnel used an electric motor with a power of 1 HP (740 Watt) and 1400 rpm connected to a fan. The variation of wind speed w

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Ion, NILA, BOGATEANU Radu, and STERE Marcel. "Small power wind turbine (Type DARRIEUS)." INCAS BULLETIN 4, no. 1 (2012): 135–42. http://dx.doi.org/10.13111/2066-8201.2012.4.1.14.

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Sun, Lam, Lam, Dai, and Hamill. "Temporal Evolution of Seabed Scour Induced by Darrieus-Type Tidal Current Turbine." Water 11, no. 5 (2019): 896. http://dx.doi.org/10.3390/w11050896.

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The temporal evolution of seabed scour was investigated to prevent damage around a monopile foundation for Darrieus-type tidal current turbine. Temporal scour depths and profiles at various turbine radius and tip clearances were studied by using the experimental measurements. Experiments were carried out in a purpose-built recirculating water flume associated with 3D printed turbines. The scour hole was developed rapidly in the initial process and grew gradually. The ultimate equilibrium of scour hole was reached after 180 min. The scour speed increased with the existence of a rotating turbine

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Delafin, Pierre-Luc, François Deniset, Jacques André Astolfi, and Frédéric Hauville. "Performance Improvement of a Darrieus Tidal Turbine with Active Variable Pitch." Energies 14, no. 3 (2021): 667. http://dx.doi.org/10.3390/en14030667.

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Vertical axis turbines, also called Darrieus turbines, present interesting characteristics for offshore wind and tidal applications but suffer from vibrations and a lower efficiency than the more conventional horizontal axis turbines. The use of variable pitch, in order to control the angle of attack of the blades continuously during their rotation, is considered in this study to overcome these problems. 2D blade-resolved unsteady Reynolds-Averaged Navier–Stokes (RANS) simulations are employed to evaluate the performance improvement that pitching blades can bring to the optimal performance of

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Victor, Samson, and Marius Paraschivoiu. "Performance of a Darrieus turbine on the roof of a building." Transactions of the Canadian Society for Mechanical Engineering 42, no. 4 (2018): 341–49. http://dx.doi.org/10.1139/tcsme-2017-0096.

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Various efforts have been made to introduce micro wind turbines in urban areas. Their onsite wind generation can be beneficial, but general rules about their ideal placement in terms of energy extraction need to be identified. This paper investigates the performance of a Darrieus turbine when installed on the roof of a building and offers a rare analysis of the synergy between the turbine and the building. This study focuses on computational fluid dynamic (CFD) analysis of a vertical-axis wind turbine mounted on the upstream edge of a building. The CFD methodology is validated by comparing the

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Mohammed, Gwani, Mamuda Buhari, Umar Muhammed Kangiwa, and John Danyaro. "Design, Fabrication and Performance Evaluation of Hybrid Vertical Axis Wind Turbine." International Journal for Modern Trends in Science and Technology 6, no. 6 (2020): 80–86. http://dx.doi.org/10.46501/ijmtst060618.

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Vertical axis wind turbines (VAWT) have attracted a lot of attention recently as an efficient tool in harnessing wind energy; however these types of wind turbine are faced with some challenges which affect their overall performance. The Darrieus rotor has difficulty to self-start by itself while the Savonius rotor has low efficiency. The performance of these turbines can be improved by combining the two VAWTs as one system. This paper presents the design of a hybrid VAWTs turbine. The Hybrid VAWTs combines the Darrieus rotor and the Savonius rotor as a single system to produce a high starting

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Obretenov, Valentin, and Rossen Tliev. "A Study of a Darrieus Vertical Axis Wind Turbine with a guiding nozzle." E3S Web of Conferences 207 (2020): 02011. http://dx.doi.org/10.1051/e3sconf/202020702011.

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This paper presents the results from an experimental study of a Vertical Axis Wind turbine model with a guiding nozzle. The geometry of the nozzle is synthesized by an original methodology. The performance characteristics of the turbine are investigated when changing the number of the blades and their pitch angle. The obtained results allow us to generate generalized characteristics that can be used in the design of new turbines of this type. The results of the pilot studies showing higher efficiency than the classical Darrieus wind turbines (up to 50 % which is close to the Betz limit).

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Mertens, Sander, Gijs van Kuik, and Gerard van Bussel. "Performance of an H-Darrieus in the Skewed Flow on a Roof1." Journal of Solar Energy Engineering 125, no. 4 (2003): 433–40. http://dx.doi.org/10.1115/1.1629309.

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Application of wind turbines on roofs of higher buildings is a subject of increasing interest. However, the wind conditions at the roof are complex and suitable wind turbines for this application are not yet developed. This paper addresses both issues: the wind conditions on the roof and the behavior of a roof-located wind turbine with respect to optimized energy yield. Vertical Axis Wind Turbines (VAWTs) are to be preferred for operation in a complex wind environment as is found on top of a roof. Since the wind vector at a roof is not horizontal, wind turbines on a roof operate in skewed flow

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Metheny, Boris, Rosyida Permatasari, and Muhammad Sjahrul Annas. "DESIGN MODELING OF SAVONIUS-DARRIEUS TURBINE FOR SEA CURRENT ELECTRIC POWER PLANT." SINERGI 25, no. 1 (2020): 27. http://dx.doi.org/10.22441/sinergi.2021.1.004.

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Turbines convert the kinetic energy of ocean currents into electrical energy produced by the sea current electric power plant. This study aims to design a power generator turbine modeling that is carried out using the Computational Fluid Dynamic (CFD) approach by comparing the geometric performance based on the angle of attack and the Tip Speed Ratio (TSR) value of the Savonius-Darrieus Turbine. Having done several trials and errors during collecting the data, the value of the TSR 1.427; 2.853; 4.28; 5; and 5.7 is proposed. Here, the NACA 0018 series has been adopted on the current design of S

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Sulistyono, Sulistyono, Elka Faizal, and Alfi Tranggono Agus Salim. "Pengaruh Variasi Radius Sudu Turbin Angin Darrieus Tipe Sudu-J." Jurnal Energi dan Teknologi Manufaktur (JETM) 3, no. 02 (2020): 15–18. http://dx.doi.org/10.33795/jetm.v3i02.65.

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Utilization of alternative energy, therefore this wind turbine is used as an alternative energy power plant. So this experimental study is used to determine how much influence on the performance of the Darrieus type J-blade vertical shaft wind turbine by varying the blade radius. The method used is a true experimental research method. The independent variables in this study are variations in wind speed of 3, 4, 5, 6, and 7 m / s. The dependent variable in this research is shaft power and efficiency. Then the controlled variables in this study were the number of blades 3 and the front radius of

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Torabi Asr, Mahdi, Reza Osloob, and Faizal Mustapha. "Double-Stage H-Darrieus Wind Turbine - Rotor Aerodynamics." Applied Mechanics and Materials 829 (March 2016): 21–26. http://dx.doi.org/10.4028/www.scientific.net/amm.829.21.

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H-Darrieus wind turbines, due to their simple design and relatively low manufacturing costs have recently received much attention particularly for standalone applications. However start-up issues associated with their operation restricted their operation in areas of low average wind speed and encourages engineers to develop novel design. Several design proposed in this way but in most cases design came up with complex sensing mechanisms and mechanical actuators or high cost manufacturing parts. A recent rotor design called double Darrieus rotor proposed as a German patent case bridged these co

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Dabachi, Mohamed Amine, Abdellatif Rahmouni, Eugen Rusu, and Otmane Bouksour. "Aerodynamic Simulations for Floating Darrieus-Type Wind Turbines with Three-Stage Rotors." Inventions 5, no. 2 (2020): 18. http://dx.doi.org/10.3390/inventions5020018.

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Growing energy demand is causing a significant decrease in the world’s hydrocarbon stock in addition to the pollution of our ecosystem. Based on this observation, the search for alternative sorts of energy to fossil fuels is being increasingly explored and exploited. Wind energy is experiencing a very important development, and it offers a very profitable opportunity for exploitation since the wind is always available and inexhaustible. Several technical solutions exist to exploit wind energy, such as floating vertical axis wind turbines (F-VAWTs), which provide an attractive and cost-effectiv

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OMATA, Shinya, and Yoshiaki TAMURA. "1931 Fluid Analysis around Darrieus Wind Turbine." Proceedings of Conference of Kanto Branch 2012.18 (2012): 607–8. http://dx.doi.org/10.1299/jsmekanto.2012.18.607.

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Dominy, R., P. Lunt, A. Bickerdyke, and J. Dominy. "Self-starting capability of a Darrieus turbine." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 221, no. 1 (2007): 111–20. http://dx.doi.org/10.1243/09576509jpe340.

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Srinivasan, C., G. Ajithkumar, S. Arul, G. Arulprasath, and T. M. Dharunbabu. "Design of Combined Savonius-Darrieus Wind Turbine." IOSR Journal of Mechanical and Civil Engineering 14, no. 02 (2017): 60–70. http://dx.doi.org/10.9790/1684-1402056070.

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Chougule, P. D., S. R. K. Nielsen, and Biswajit Basu. "Active Blade Pitch Control for Straight Bladed Darrieus Vertical Axis Wind Turbine of New Design." Key Engineering Materials 569-570 (July 2013): 668–75. http://dx.doi.org/10.4028/www.scientific.net/kem.569-570.668.

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As Development of smallvertical axis wind turbines (VAWT) for urban use is becoming an interestingtopic both within industry and academia. However, there are few new designs ofvertical axis turbines which are customized for building integration. These aregetting importance because they operate at low rotational speed producing veryless noise during operation, although these are less efficient than HorizontalAxis Wind Turbines (HAWT). The efficiency of a VAWT has been significantlyimproved by H-Darrieus VAWT design based on double airfoil technology asdemonstrated by the authors in a previous p

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Mei, Yi, and Jian Jun Qu. "Aerodynamic Performance Evaluation with a New Method for Darrieus Wind Turbine." Advanced Materials Research 1014 (July 2014): 115–19. http://dx.doi.org/10.4028/www.scientific.net/amr.1014.115.

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The operation condition for darrieus wind turbine is usually complex in urban sites. One of characteristics is unsteady tip speed ratios during the rotor operating, which makes the widely used aerodynamic performance indicator, maximum power coefficient, not so suitable for evaluating vertical axis rotor performance. In this paper, a new method based on the power coefficient values under variable tip speed ratios was developed and the mathematical expression derived by numerical integration measure was presented. Furthermore, a novel wind turbine power performance indicator, average effective

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Shishkin, Nikolai, and Roman Il’in. "Experimental determination of the energy efficiency of rotors of vertical-axis wind turbines for autonomous power supply on land and at sea." MATEC Web of Conferences 245 (2018): 06016. http://dx.doi.org/10.1051/matecconf/201824506016.

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For the first time, experimental studies have been performed to assess the effect of flaps with triangular elements on the operation of the N-Darrieus and Savonius rotors. It has been established that the rotational speed of the original N-Darrieus and Savonius rotors having blades with flaps is greater than the rotation frequency of the N-Darrieus and Savonius rotors of the known construction by 18%, and the power factors of the N-Darrieus and Savonius rotors are for 17% and 19% more. Optimization of the geometrical parameters of the blades can lead to an increase in the power factor of the N

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Hutomo, Go P. C. T., Galih S. T. A. Bangga, and Herman Sasongko. "CFD Studies of the Dynamic Stall Characteristics on a Rotating Airfoil." Applied Mechanics and Materials 836 (June 2016): 109–14. http://dx.doi.org/10.4028/www.scientific.net/amm.836.109.

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The periodic changes of the angles of attack in time occurring in the Darrieus turbine blade result in the significant increase of unsteady characteristics, commonly referred as dynamic stall. CFD simulations using SST k-ω turbulence model with Kato-Launder correction were used to examine the physical phenomena occurring on the sectional airfoil of the blade. The blade was modeled as an airfoil rotating about its center of rotation. The CFD calculations show remarkable differences of the forces acting on the airfoil compared with the static condition due to the traveling vortices phenomena. Th

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Chen, Jing Ru, Zhen Zhou Zhao, and Tao Li. "Characteristic Analysis of Three-Bladed Darrieus Wind Turbine Based on the Multiple Streamtube Model." Applied Mechanics and Materials 651-653 (September 2014): 663–67. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.663.

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The paper analyzes the effect of airfoil thickness, camber and blade pitch angle on the performance of the three-bladed Darrieus wind turbines. The research results show that the increase of airfoil thickness, camber and pitch angle of blade, can improve power coefficient when the wind turbine tip speed ratio between zero and four. The increase of thickness and camber of the airfoil leads to running tip speed ratio range of wind turbine get narrowed, and reduces the power coefficient when wind turbine runs in high tip speed ratio range. When the pitch angle of blade is 1˚, power coefficient re

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D., Ramirez, Rubio-Clemente A., and E. Chica. "Design and numerical analysis of an efficient H-Darrieus vertical-axis hydrokinetic turbine." Journal of Mechanical Engineering and Sciences 13, no. 4 (2019): 6036–58. http://dx.doi.org/10.15282/jmes.13.4.2019.21.0477.

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Hydrokinetic turbines are one of the technological alternatives to generate and supply electricity for rural communities isolated from the national electrical grid with almost zero emission. The Darrieus turbine is one of the options that can be used as a hydrokinetic turbine due to its high power coefficient (Cp) and easy manufacture. In the present work, the design and hydrodynamic analysis of a Darrieus vertical-axis hydrokinetic turbine of 500 W was carried out. A free stream velocity of 1.5 m/s was used for the design of the blades. The diameter (D) and blade length (H) of the turbine wer

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