Relevant bibliographies by topics / Darrieus Rotor

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Darrieus Rotor'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Darrieus Rotor"

1

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 the performance characteristics of presence of deflector and Savonius rotor in Darrieus-Savonius turbine. Results conclude that the single deflector plate placed on returning blade side increases the torque and power coefficient. The presence of Savonius rotor increases the torque at a lower speed, but the power coefficient decreases. The torque and power coefficient characteristics depend on the aspect ratio of Savonius rotor.
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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-Darrieus rotor up to a value of 0.72, which is higher than the maximum possible value of 0.45 for the horizontal axis wind turbine. It is advisable to aggregate N-Darrieus rotors with Savonius rotors having a large starting torque. The upgraded N-Darrieus and Savonius rotors, as well as the combined rotors based on them, can be used in power supply systems for various objects on land and at sea.
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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 shaft which have arm attaching to the shaft. A simple combined turbine offers two rotors on the same shaft. The combined turbine that consists of two Darrieus and Savonius blades was tested in wind tunnel test section with constant wind velocity and its performance was assessed in terms of power and torque coefficients. The study gives the effect of the radius ratio between Savonius and Darrieus rotor on the performance of the turbine. The results show that there is a significant influence on the turbine performance if the radius ratio was changed.
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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 (May 17, 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 AHDT. AHDT integrates a dynamically varying Savonius rotor with a Darrieus rotor. A fully detailed 2D numerical study employing Reynold-Averaged Navier Stokes (RANS) is carried out to investigate the impact of the Darrieus rotor diameter (DR) on the Savonius rotor (DT) with regard to hybrid turbine performance. The power coefficient of the Darrieus rotor is evaluated when the Savonius rotor is in the closed condition (cylinder) of various diameters. The influence of Reynolds number (Re) on the torque coefficient is examined. Power loss of 58.3% and 25% is reported for DR/DT ratio of 1.5 and 2 respectively for AHDT with solidity 0.5 at 9 m/s. The flow interaction between the Savonius rotor in closed configuration reveals the formation of von Karman vortices that interact with Darrieus blades resulting in flow detachment. An optimum diametrical ratio (DR/DT) of 3 is found to yield the maximum power coefficient of the Darrieus rotor.
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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 complexities appropriately. The aim of present study is to investigate this innovative design from aerodynamic point of view by means of validated CFD techniques. A flow-driven simulation setup based on 6DOF calculations employed in order to study rotor operation from stand still until peak performance obtained. Results from these precise modeling reveal the superiority of the proposed double-stage design in compare with the original H-Darrieus rotors in terms of start-up behavior and optimum performance.
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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 NACA 0015. The Darrieus-Savonius turbine’s performances were studied experimentally in an irrigation canal of South Sumatera, Indonesia. The results show that the distance of Savonius buckets from the shaft centre influences performance of combined turbine, and the attachment angle of Savonius rotor made important variation of turbine performance.
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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 was set to 2, 3, 4, 5, 6 and 7 m/s. The results showed that: (a) the highest rotation speedal speed was achieved by the HC-rotor diameter of 76,2 on 105 rpm with a wind speed of 7 m/s; (b) the highest value of the coefficient of power (Cp) is achieved by the HC-rotor diameter of 101,6mm (c) the highest value of the coefficient of torque (Ct) is achieved with the HC-rotor diameter of 152,4mm (d) the Darrieus HC-rotor wind turbine is suitable to be used in tropical regions that have low wind speeds. This result provides important information about the effect of the C rotor radius on the performance of HC-rotor Darrieus wind turbine blade vertical axis.
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Brahimi, M. T., and I. Paraschivoiu. "Darrieus Rotor Aerodynamics in Turbulent Wind." Journal of Solar Energy Engineering 117, no. 2 (May 1, 1995): 128–36. http://dx.doi.org/10.1115/1.2870839.

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The earlier aerodynamic models for studying vertical axis wind turbines (VAWT’s) are based on constant incident wind conditions and are thus capable of predicting only periodic variations in the loads. The purpose of the present study is to develop a mode capable of predicting the aerodynamic loads on the Darrieus rotor in a turbulent wind. This model is based on the double-multiple streamtube method (DMS) and incorporates a stochastic wind model The method used to simulate turbulent velocity fluctuations is based on the power spectral density. The problem consists in generating a region of turbulent flow with a relevant spectrum and spatial correlation. The first aerodynamic code developed is based on a one-dimensional turbulent wind model. However, since this model ignores the structure of the turbulence in the crossflow plane, an extension to three dimensions has been made. The computer code developed, CARDAAS, has been used to predict aerodynamic loads for the Sandia-17m rotor and compared to CARDAAV results and experimental data. Results have shown that the computed aerodynamic loads have been improved by including stochastic wind into the aerodynamic model.
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Gorelov, D. N. "Energy characteristics of Darrieus rotor (review)." Thermophysics and Aeromechanics 17, no. 3 (September 2010): 301–8. http://dx.doi.org/10.1134/s0869864310030017.

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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 and stationary conditions. Aerodynamic forces assessment will be executed for 3 different blade shapes (nonsymmetric and symmetric airfoils) like the airfoil section shapes of the Darrieus rotor blades. NACA 0021, LS413, and S1046 are selected as cross-sectional profile in this work. CFD simulations have been used in this work to get the different aerodynamic forces on the rotor blades of the Darrieus turbines. The present results indicated that the symmetric S1046 blade has higher forces during the rotation and stagnant (static) conditions. Moreover, the self-starting capability of NACA 0021 is better than S1046 due to low aerodynamic torsion on the S1046 blades.
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Dissertations / Theses on the topic "Darrieus Rotor"

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Nière, Romain. "Etude d'une station aérogénératrice utilisant un rotor de Darrieus." Grenoble : ANRT, 1985. http://catalogue.bnf.fr/ark:/12148/cb37595018b.

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Niere, Romain. "Etude d'une station aérogénératrice utilisant un rotor de Darrieus." Bordeaux 1, 1985. http://www.theses.fr/1985BOR10545.

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Dans ce travail, l'auteur presente l'installation et la regulation d'une station aerogeneratrice situee a l'iut a de bordeaux, et utilisant un rotor de darrieus. La regulation de cet aerogenerateur se fait a l'aide d'un microprocesseur qui lance l'eolienne, optimise la puissance captee en jouant sur la charge resistive, et arrete l'appareil en cas de vitesse de rotation trop elevee. Les parametres necessaires a cette regulation ont ete determines experimentalement. Les resistances de charge ont ete optimisees grace a un programme de simulation du fonctionnement du systeme eolien
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Bamdad-Soofi, Jahanshah. "Performances mécaniques du rotor d'une éolienne Darrieus et application à "Aéolia 3" en fonctionnement." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375956823.

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BAMDAD-SOOFI, JAHANSHAH. "Performances mecaniques du rotor d'une eolienne darrieus et application a "aeolia 3" en fonctionnement." Paris, ENSAM, 1986. http://www.theses.fr/1986ENAM0006.

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Etude des contraintes et des deformees du rotor pour toute situation de fonctionnement optimal, suivant trois etapes de recherche: 1. Analyse de fabrication des pales d'aeolia 3 (forme troposkienne de construction, parametres geometriques, contraintes normales dues au procede de cintrage). 2. Analyse du comportement statique du rotor. 3. Analyse du comportement dynamique des pales en fonctionnement (y compris l'arret) avec determination des modes propres du rotor et des deformees modales. Deux methodes de calcul, toutes deux matricielles, ont ete etudiees selon les besoins en rapidite du calcul et de sa mise au point et selon les besoins de precision des resultats
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Hořava, Pavel. "Simulace malé větrné elektrárny se Savoniovým-Darrieovým rotorem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220933.

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This master‘s thesis deals with the simulation of small wind power plant with Savonius-Darrieus rotor. On the base of the actuator disk theory the performance of modeled power plant is predicted in theoretical part and the power coefficient as well. The process of designing the wind model is also described in this theoretical part. The practical part of this thesis is dedicated to the creating a model of DS300 vertical axis hybrid wind turbine in Matlab/Simulink. This model was used to generating of the power curve of modeled wind power plant and for the computing of power and total produced energy during an average and above-average day as well. The whole thesis is enclosed by evaluating of obtained results.
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Moreira, Ricardo Alexandre Lopes. "Turbina Darrieus Numa Plataforma Aérea Por Efeito Magnus." Master's thesis, 2017. http://hdl.handle.net/10362/36890.

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Nos últimos anos, tem-se notado um forte investimento no aproveitamento da energia eólica para a obtenção de energia elétrica. O desenvolvimento tecnológico, a procura constante na rentabilização das energias renováveis e a preocupação com a sustentabilidade do planeta Terra conduzem a um novo paradigma energético. Nesse sentido, pretende-se com este trabalho estudar a possibilidade de configurar uma turbina Darrieus rotor-H, de modo a desenvolver um novo modelo para uma plataforma aérea baseada no efeito Magnus, afim de rentabilizar o projeto lançado pela empresa Omnidea. Numa primeira aproximação, são formuladas duas famílias de configurações, tendo como princípio base o efeito Magnus, onde são discutidos e apresentados alguns parâmetros de funcionamento na perspetiva de potenciar o aproveitamento energético da turbina. São realizadas simulações numéricas a quatro casos de estudo que simbolizam, numa primeira fase, o antigo e o novo modelo da plataforma aérea. Primeiro, simula-se um escoamento bidimensional em torno de um cilindro estacionário e, posteriormente, com o intuito de validar o efeito Magnus, simula-se um escoamento em torno de um cilindro em rotação para várias velocidades de vento e várias velocidades angulares. Depois, simula-se um escoamento bidimensional em torno das pás de uma turbina Darrieus rotor-H e, seguidamente, simula-se, juntamente com essas pás, um cilindro em rotação, cujo eixo de rotação coincide com o eixo de rotação da turbina. Os resultados obtidos são comparados, quando possível, com resultados de outros autores. As simulações numéricas e aerodinâmicas são realizadas no programa OpenFOAM. Para além da bidimensionalidade, o escoamento também é turbulento, pelo que são apresentados os modelos de turbulência e os respetivos parâmetros usados em cada simulação. Através da resolução das equações de Navier-Stokes, o OpenFOAM determina as variações de velocidade e pressão do escoamento.
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Hou, Ying-Hsiu, and 侯盈秀. "The Study of Identification of Design Factors Vertical Axis Wind Turbine Blades: Darrieus Rotor as Example." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/75974505528874607773.

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碩士
中原大學
工業工程研究所
100
Energy is the foundation of civilization and is to rely on life. Since ancient times, human highly depends on the energy, after the energy crisis of the 1970s, with the depletion of fossil fuels and fossil fuel prices continue to rise, to find alternative energy sources has become the pressing question.Wind power technology is already mature, in order to provide vertical axis wind turbine technology develop a better design. In this study, use Darrieus rotor as an example. To find the best blade design factor. First of all, we collect the data of vertical axis wind turbine's related technologies for getting some understanding of the current status of the overall technology development.Then this study do retrieval for patent of vertical axis wind turbine, in order to facilitate the institution of the vertical axis wind turbine design patent analysis. And use the production of Patent Map, to make the most effective analysis of information, to understand the development of the overall industry environment. At the same time, A patent function matrix of patent map is applied to identify the most effective analysis of wind turbines. As to development of technology R&; D and innovative design of the entry point. To establish the difference between existing products, market and technology segments. This study also applies TRIZ conflict matrix and inventive principles, to construct a vertical axis wind blades factor table, and to find the best design factors, and in line with the Darrieus windmills literature at home and abroad to investigate, construct a vertical axis windmill blades factor table; Furthermore, use the orthogonal array analysis of Taguchi Method to find Darrieus rotor’s best blades factor, to draw a windmill blade graphics, use of the finite element method to the NASTRAN software to carry out the experiments and analysis for the dynamic behavior, hope to provide blade design technology information.
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Book chapters on the topic "Darrieus Rotor"

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Mabrouki, Ibrahim, Ahmed Samet, Zied Driss, and Mohamed Salah Abid. "Time Step Size Effect on the Hydrodynamic Structure around a Water Darrieus Rotor." In Applied Condition Monitoring, 359–68. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-14532-7_37.

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Souaissa, Khaled, Moncef Ghiss, Mouldi Chrigui, Hatem Bentaher, and Aref Maalej. "DMST Investigation of the Effect of Cambered Blade Curvature on Small H-Darrieus Rotor Performance." In Advances in Mechanical Engineering and Mechanics, 95–102. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-19781-0_12.

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Ferroudji, F., L. Saihi, and K. Roummani. "Finite Element Modelling and Analysis for Modal Investigation of a Blade H-Type Darrieus Rotor." In Artificial Intelligence and Renewables Towards an Energy Transition, 416–22. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-63846-7_39.

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"Non-zero fixed pitch angle effect on performance of Darrieus rotor." In Resources, Environment and Engineering, 249–54. CRC Press, 2014. http://dx.doi.org/10.1201/b17389-40.

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Conference papers on the topic "Darrieus Rotor"

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Yanuarsyah, Ilmawan, Vivien Suphandani Djanali, and Bambang Arip Dwiyantoro. "Numerical study on a Darrieus-Savonius wind turbine with Darrieus rotor placement variation." In DISRUPTIVE INNOVATION IN MECHANICAL ENGINEERING FOR INDUSTRY COMPETITIVENESS: Proceedings of the 3rd International Conference on Mechanical Engineering (ICOME 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5046228.

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Worasinchai, Supakit, Grant L. Ingram, and Robert G. Dominy. "The Physics of H-Darrieus Turbine Starting Behaviour." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25461.

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This paper investigates Darrieus turbine starting behaviour and provides a resolution to the contradictory accounts of whether or not the Darrieus turbine can self-start. The paper builds on previous work proposing an analogy between the aerofoil in Darrieus motion and flapping-wing flow mechanisms. This analogy suggests that unsteadiness could be exploited to generate additional thrust and that this unsteady thrust generation is governed by rotor geometry. To confirm the hypothesis, this investigation incorporated unsteady effects into a rotor analysis which resolved the differences between experiments and predictions made using a steady-state assumption. The fundamental physics of starting were also studied and the rotor geometry parameters that govern the generation of unsteady thrust were explored: namely chord-to-diameter ratio and blade aspect ratio. Further simulation showed that the Darrieus rotor is prone to be locked in a deadband where the thrust is not continuous around a blade rotation. This discrete thrust is caused by the large variation of incidence angle during start-up making the Darrieus blade ineffective during part of the rotation. The results also show that unsteady thrust can be promoted through an appropriate selection of blade aspect ratio and chord-to-diameter ratio and therefore it is possible to design rotors that have an ability to self-start. A new definition of self-starting is proposed based upon this improved understanding.
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Mohamed, Omar Sherif, Ahmed Ibrahim, and Ahmed M. R. El Baz. "CFD Investigation of the Multiple Rotors Darrieus Type Turbine Performance." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91491.

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Abstract The last few years have witnessed researches concerned by vertical axis wind turbine (VAWT) performance considering its advantages compared to the horizontal axis wind turbines, as it can be operated in urban areas without producing noise, ease of maintenance and simple construction, in addition to its low cost. More interest is growing in developing efficient clusters of VAWT in order to increase power generation at specific sites by using multiple turbines. In the present work, the performance of various configurations of Darrieus type VAWT clusters is examined using computational fluid dynamics (CFD) simulations. The objective of this work is to increase the overall power coefficient of the turbines cluster compared to single rotor performance. This objective shall be achieved by examining mutual interactions between rotors arranged in close proximity and examining the effect of oblique angle between rotors on overall performance of the cluster of rotors. The performance is assessed by observing the overall power coefficient of the cluster. Also, the velocity wake of the simulated three rotors turbine cases was analyzed and compared to the that of the single rotor.
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Khan, M., M. Iqbal, and J. Quaicoe. "Design Considerations of a Straight Bladed Darrieus Rotor for River Current Turbines." In 2006 IEEE International Symposium on Industrial Electronics. IEEE, 2006. http://dx.doi.org/10.1109/isie.2006.295835.

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Hassan, S. M. Rakibul, Mohammad Ali, and Md Quamrul Islam. "The effect of solidity on the performance of H-rotor Darrieus turbine." In INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING: Proceedings of the 11th International Conference on Mechanical Engineering (ICME 2015). Author(s), 2016. http://dx.doi.org/10.1063/1.4958372.

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Torresi, Marco, Bernardo Fortunato, and Sergio Mario Camporeale. "An Efficient 3D CFD Model for the Analysis of the Flow Field Around Darrieus Rotors." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95564.

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An efficient numerical technique has been developed in order to investigate flow characteristics and global performance of Darrieus rotors. The interest for this kind of vertical axis wind turbines arises from their great capacity for integration within urban areas and for distributed generation. The proposed methodology is based on the solution of the steady three-dimensional governing equations, by means of a robust commercial CFD code. Since the effect of the turbine blades on the flow field is simulated through the introduction of momentum sources in the porous shell representing the volume swept by the turbine blades, any expensive refinement of the grid, near the rotor, is avoided. This approach dramatically reduces the computational costs, with respect to conventional unsteady flow simulations. The model efficiency enables the simulation of the flow field around Darrieus rotors considering complex and realistic computational domains, for instance when these turbines are clustered within a wind farm or placed inside urban areas. The methodology is validated by reproducing the performance of the Sandia 17-meter Darrieus rotor with approximate troposkien shape. Comparisons with other codes are also presented in order to highlight the advantages of the proposed method.
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Raciti Castelli, Marco, and Ernesto Benini. "Effect of Blade Inclination Angle on a Darrieus Wind Turbine." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-23332.

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This paper presents a model for the evaluation of energy performance and aerodynamic forces acting on a small helical Darrieus vertical axis wind turbine depending on blade inclination angle. It consists of an analytical code coupled to a solid modeling software, capable of generating the desired blade geometry depending on the desired design geometric parameters, which is linked to a finite volume CFD code for the calculation of rotor performance. After describing and validating the model with experimental data, the results of numerical simulations are proposed on the bases of five machine architectures, which are characterized by an inclination of the blades with respect to the horizontal plane in order to generate a phase shift angle between lower and upper blade sections of 0°, 30°, 60°, 90° and 120° for a rotor having an aspect ratio of 1.5. The effects of blade inclination on tangential and axial forces are first discussed and then the overall rotor torque is considered as a function of azimuthal position of the blades. Finally, the downstream tip recirculation zone due to the finite blade extension is analyzed for each blade inclination angle, achieving a numerical quantification of the influence of induced drag on rotor performance, as a function of both blade element longitudinal and azimuthal positions of the blade itself.
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Kumar, Palanisamy Mohan, Kulkarni Rohan Ajit, Mohan Ram Surya, Narasimalu Srikanth, and Teik-Cheng Lim. "On the self starting of darrieus turbine : An experimental investigation with secondary rotor." In 2017 Asian Conference on Energy, Power and Transportation Electrification (ACEPT). IEEE, 2017. http://dx.doi.org/10.1109/acept.2017.8168545.

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Ptacek, Michal, Marek Kopicka, Tomas Pavelka, and Lukas Radil. "Modelling of small wind power plant with savonius-darrieus rotor in the PSCAD." In 2016 17th International Scientific Conference on Electric Power Engineering (EPE). IEEE, 2016. http://dx.doi.org/10.1109/epe.2016.7521811.

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10

Bianchini, Alessandro, Lorenzo Ferrari, and Sandro Magnani. "Start-Up Behavior of a Three-Bladed H-Darrieus VAWT: Experimental and Numerical Analysis." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-45882.

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Abstract:
Despite increasing attention paid by both the industrial and the academic worlds, an effective diffusion of Darrieus wind turbines is still hindered by productivity lower than that of classical HAWTs, mainly connected to the critical behavior of these machines during the transient phases and in particular, during the start-up transitory, which has not been investigated in depth in the past. In this paper, a numerical code for the evaluation of the transient behavior of H-Darrieus turbines is presented. The time-dependent code was based on a theoretical approach derived from the Momentum Models and completed by several sub-models for the evaluation of the main secondary and parasitic effects. The new software was validated with an extended experimental campaign in a wind tunnel on a three-bladed H-Darrieus turbine, obtaining constant agreement with experimental data. A sensitivity analysis was then performed in order to investigate the start-up behavior of a generic small size three-bladed H-Darrieus rotor. In particular, for a fixed turbine layout, the influence of the airfoil type and the blade shape on the startup capabilities of the rotor was investigated as a function of the initial position of the rotor and the oncoming wind velocity.
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