Relevant bibliographies by topics / Circular Wing

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Circular Wing'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Circular Wing"

1

Segal, Zelik. "Hydrodynamic Characteristics of Wings in Circular Motion." Journal of Ship Research 46, no. 02 (June 1, 2002): 92–98. http://dx.doi.org/10.5957/jsr.2002.46.2.92.

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Hydrodynamic characteristics of wings in circular motion are determined at present very approximately, as a rule, according to the solution of the problem on streamlining the wing by a small curvature nonviscid potential. However, in some practical cases the radius of the wing trajectory is of the same order of magnitude as the wing chord. That is why there is a necessity for a more correct determination of wing hydrodynamic characteristics, accounting for the relatively large curvature of the wing trajectory and the and viscosity. This paper presents a description and results of our theoretical and experimental investigation of the hydrodynamic characteristics of wings in a wide range of relative radiuses of their motion.
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Ali, Suliman M. M., Ashraf A. Omar, Waleed Fekry Faris, Ahmad Faris Ismail, and J. S. Mohamed Ali. "Aerodynamics of a circular planform wing." IOP Conference Series: Materials Science and Engineering 488 (March 19, 2019): 012005. http://dx.doi.org/10.1088/1757-899x/488/1/012005.

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Yamamoto, Yuzo. "Induced drag of a wing in a circular wind tunnel." AIAA Journal 30, no. 9 (September 1992): 2344–46. http://dx.doi.org/10.2514/3.11227.

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Iosilevskii, G. "Asymptotic theory of high-aspect-ratio arched wings in steady incompressible flow." Journal of Fluid Mechanics 303 (November 25, 1995): 367–77. http://dx.doi.org/10.1017/s0022112095004307.

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Asymptotic theory of high-aspect-ratio wings in steady incompressible flow is extended to a case where the wing forms either an open or closed circular arc. The generalization is based on an integral formulation of the problem, which resembles the one used by Guermond (1990) for a plane curved wing. A second-order approximation is obtained for the load distribution on two model wings, one resembling that of a gliding parachute, and the other resembling a short duct.
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Mat Taib, C. F., Abdul Aziz Jaafar, and Salmiah Kasolang. "Numerical Study of Winglet Cant Angle Effect on Wing Performance at Low Reynolds Number." Applied Mechanics and Materials 393 (September 2013): 366–71. http://dx.doi.org/10.4028/www.scientific.net/amm.393.366.

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The study on the effect of winglet shape in wing design has been a focus of many researchers. Nevertheless, the effect of cant angle on the wing performances at low Reynolds number has not been fully explored. This paper describes the effect of a single semi-circular shaped winglet attached with a rectangular wing model to lower the drag without increasing the span of the wing. Aerodynamic characteristics for the rectangular wing (NACA 65-3-218) with and without semi-circular winglets have been studied using STAR CCM+ 4.0. This numerical analysis is based on Finite Volume Approach. Simulations were carried out on the rectangular wing model with and without winglet at aspect ratio of 2.73 and Reynolds number of 0.16 x 10 6 for various angles of attack. From the numerical analysis, wing performance characteristics in terms of lift coefficient CL, drag coefficient CD, and lift-to-drag ratio, CL/CD were obtained. It was found that the addition of a semi-circular winglet has resulted in a larger lift curve slope and higher Lift-to-Drag ratio in comparison with the case of a wing without winglet. Further investigation has revealed that a wing with semi-circular winglet with cant angle of 45 degree has produced the best Lift-to-Drag ratio, CL/CD.
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Datt, Ravi, Mangal Bhist, Alok Kothiyal, Rajesh Maithani, and Anil Kumar. "Fluid flow and heat transfer enhancement in wings with combined solid ring twisted tape inserts circular heat exchanger tube." Thermal Science 23, no. 6 Part B (2019): 3893–903. http://dx.doi.org/10.2298/tsci170613095d.

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Experimental examination is carried out to study the turbulent heat transfer and fluid-flow characteristics in circular heat exchanger tube using combined wing with solid ring twisted tape inserts. A series of experiments has been performed with the range of Reynolds number varied from 3000 to 21000, number of twisted taped inserts, NTT, varied from 1.0 to 4.0 with constant value of other twisted tape parameters such as rings pitch ratio, dR /DT = 1.0, wing pitch ratio, PW /WT = = 3.0, and wing depth ratio, Wd /WT = 1.67. Based on the examined, turbulent heat transfer and fluid-flow in wing with combined solid ring twisted tape inserts results are compared with plain circular tube under same operating conditions. The experimental results show that the heat transfer is increased around 5.66 times than plane circular heat exchanger tube. The thermal and hydrodynamic performance parameter based on equal pumping power, ?p, was found to be highest for NTT = 3.0. The optimum value of thermal and hydrodynamic performance has been found to be 2.74 for Reynolds mumber of 3000 within the range of the parameters investigated. Multiple wings with solid rings twisted tape inserts have been also shown to be thermally as well as hydraulically better in comparison to other similar twisted tape insert geometries.
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Kenyon, Kern E. "Lift Force on a Circular Arc Wing." Natural Science 09, no. 10 (2017): 351–54. http://dx.doi.org/10.4236/ns.2017.910033.

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TANAKA, Masaki, Takashi MATSUNO, and Hiromitsu KAWAZOE. "312 CFD Analysis around Circular Ring Wing." Proceedings of Conference of Chugoku-Shikoku Branch 2006 (2006): 103–4. http://dx.doi.org/10.1299/jsmecs.2006.103.

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YAMAMOTO, Yuzo. "Minimum Induced Drag of a Wing in a Circular Open Wind Tunnel." Journal of the Japan Society for Aeronautical and Space Sciences 40, no. 456 (1992): 23–27. http://dx.doi.org/10.2322/jjsass1969.40.23.

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KATO, Masahiro, Kazuaki KAWAUCHI, Satoshi KIKUCHI, Shigeki IMAO, and Yasuaki KOZATO. "Wing in Grand Effect of Circular-Arc Aerofoiles." Proceedings of Conference of Tokai Branch 2017.66 (2017): 407. http://dx.doi.org/10.1299/jsmetokai.2017.66.407.

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Dissertations / Theses on the topic "Circular Wing"

1

Mesrobian, Chris Eden. "Concept Study of a High-Speed, Vertical Take-Off and Landing Aircraft." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/35574.

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The purpose of the study was to evaluate the merits of the DiscRotor concept that combine the features of a retractable rotor system for vertical take-off and landing (VTOL) with an integral, circular wing for high-speed flight. Tests were conducted to generate basic aerodynamic characteristics of the DiscRotor in hover and in fixed-wing flight.

To assess the DiscRotor during hover, small scale tests were conducted on a 3ft diameter rotor without the presence of a fuselage. A â hover rigâ was constructed capable of rotating the model rotor at speeds up to 3,500 RPM to reach tip speeds of 500fps. Thrust and torque generated by the rotating model were measured via a two-component load cell, and time averaged values were obtained for various speeds and pitch angles. It has been shown that the DiscRotor will perform well in hover. Ground Effects in hover were examined by simulating the ground with a movable, solid wall. The thrust was found to increase by 50% compared to the ground-independent case. Pressure distributions were measured on the ground and disc surfaces. Velocity measurements examined the flow field downstream of the rotor by traversing a seven hole velocity probe. A wake behind the rotor was shown to contract due to a low pressure region that develops downstream of the disc.

Wind tunnel experimentation was also performed to examine the fixed wing flight of the DiscRotor. These experiments were performed in the VA Tech 6â X6â Stability Tunnel. A model of the fuselage and a circular wing was fabricated based upon an initial sizing study completed by our partners at Boeing. Forces were directly measured via a six degree of freedom load cell, or balance, for free stream velocities up to 200fps. Reynolds numbers of 2 and 0.5 million have been investigated for multiple angles of attack. Low lift-to-drag ratios were found placing high power requirements for the DiscRotor during fixed-wing flight. By traversing a seven-hole velocity probe, velocities in a 2-D grid perpendicular to the flow were measured on the model. The strengths of shed vortices from the model were calculated. A method to improve fixed-wing performance was considered where two blades were extended from the disc. An increase of 0.17 in the CL was measured due to the interaction between the disc and blades.

This research utilized a wide range of experiments, with the aim of generating basic aerodynamic characteristics of the DiscRotor. A substantial amount of quantitative data was collected that could not be included in this document. Results aided in the initial designs of this aircraft for the purpose of evaluating the merit of the DiscRotor concept.
Master of Science

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Guerrero, Reyes Lizbeth. "Circular business opportunities : exploring a win-win-win situation from a design thinking perspective." Thesis, Mälardalens högskola, Innovation och produktrealisering, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-52706.

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The transport sector is one of the main contributors to greenhouse gas emissions worldwide. A current solution to this problem is the introduction of electric vehicles into our transport fleets. However, this solution comes with its challenges; for instance, the environmental impact of batteries once they reach their end-of-life. The circular economy is an approach to manage ecological electromobility issues while providing economic and societal wellbeing. A starting point for the implementation of a circular economy can be found in the implementation of circular business models. Because the circular economy requires its actors to think in systems, the collaboration between multiple stakeholders is essential. However, most circular business model frameworks are focusing on the focal firm, which is not sufficient to encourage cross-collaboration between organizations. Therefore, this study outlines the development of a new framework that focuses on a multi-stakeholder perspective. I propose the “framework for multi-stakeholder circular business model innovation” to explore win-win-win scenarios for the management of 2LB. I conducted a study in collaboration with Svealandstrafiken, Mälarenergi and Västerås Stad. The organizations were involved in data collection via a series of interviews and the validation of the framework through a workshop. The proposed framework consists of a process of four phases subdivided into eight steps that meant to address key challenges organizations are facing to achieve circularity. Within these four phases, the framework encourages discussions on shared values and visions between all stakeholders at an early stage. As a consequence, better collaborations and relationships are formed, which positively benefits the development of circular business models.
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Christopoulos, George P. "Oscillating-flow wind tunnel studies for a circulation control circular cylinder." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28435.

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Nguyen-Sy, Lam. "The theoretical modelling of circular shallow foundation for offshore wind turbines." Thesis, University of Oxford, 2005. http://ora.ox.ac.uk/objects/uuid:fa4000fb-8de6-4093-b528-3e60d774dea0.

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Currently, much research is being directed at alternative energy sources to supply power for modern life of today and the future. One of the most promising sources is wind energy which can provide electrical power using wind turbines. The increase in the use of this type of energy requires greater consideration of design, installation and especially the cost of offshore wind turbines. This thesis will discuss the modelling of a novel type of shallow foundation for wind turbines under combined loads. The footing considered in this research is a circular caisson, which can be installed by the suction technique. The combined loads applied to this footing will be in three-dimensional space, with six degrees of freedom of external forces due to environmental conditions. At the same time, during the process of building up the model for a caisson, the theoretical analyses for shallow circular flat footing and spudcans also are established with the same principle. The responses of the soil will be considered in both elastic and plastic stages of behaviour, by using the framework of continuous plasticity based on thermodynamic principles. During this investigation, it is necessary to compare the numerical results with available experimental data to estimate suitable values of factors required to model each type of soil. There are five main goals of development of the model. Firstly, a new expression for plasticity theory which includes an experimentally determined single yield function is used to model the effects of combined cyclic loading of a circular footing on the behaviour of both sand and clay. This formulation based on thermodynamics allows the derivation of plastic solutions which automatically obey the laws of thermodynamics without any further assumptions. A result of this advantage is that non-associate plasticity, which is known to be a proper approximation for geotechnical material behaviour, is obtained logically and naturally. A FORTRAN source code called ISIS has been written as a tool for numerical analysis. Secondly, since there are some characteristics of the geometric shape and installation method which are quite different from that of spudcans and circular flat footing, another objective of this study is to adapt the current model which has been developed in ISIS for spudcans to the specific needs of caissons. The third goal of this research is the simulation of continuous loading history and a smooth transition in the stress-strain relationship from elastic to plastic behaviour. The model is developed from a single-yield-surface model to a continuous plasticity model (with an infinite number of yield surfaces) and then is discretized to a multiple-yield-surface model which can be implemented by numerical calculation to be able to capture with reasonable precision the hysteretic response of a foundation under cyclic loading. This can not be described by a conventional single-yield-surface model. Fourthly, as a method to simplify the numerical difficulties arising from the calculation process, a rate-dependent solution will be introduced. This modification is implemented by changing the dissipation function derived from the second law of thermodynamics. Finally, in order to control the model to capture the real behaviour, many parameters are proposed. A parametric study will be implemented to show the effects of these parameters on the solution.
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Miranda, Sergio. "Active Control of Separated Flow over a Circular-Arc Airfoil." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/34411.

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An experimental study of active control of fully separated flow over a symmetrical circular-arc airfoil at high angles of attack was performed. The experiments were carried out in a low-speed, open circuit wind tunnel. Angles of attack from 10 to 40 degrees were tested. Low-power input, unsteady excitation was applied to the leading or trailing edge shear layers. The actuation was provided by the periodic oscillation of a 4-percent-chord flap placed on the suction side of the airfoil and facing the sharp edge. Vortex-shedding frequencies were measured and harmonic combinations selected as the applied actuator frequencies. Pressure measurements over the airfoil show that the control increased the normal force coefficient by up to 70%. This supports the idea of vortex capture in the time-averaged sense, enhancing the lift on the airfoil by managing the shear layer roll up. The results indicate the viability of the control of large-scale flow fields by exploiting the natural amplification of disturbances triggered by small-scale actuators. The application of flow control on sharp-edged aircraft wings could lead to improved maneuverability, innovative flight control and weight reduction. These can be achieved by inexpensive, low-power, rugged actuators.
Master of Science
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Zurell, Cory. "Aerodynamics of a circular cylinder inclined to airflow and wind-induced vibrations of dry, inclined cables at high wind speeds." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/29184.

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Cable-stayed bridges are an efficient and elegant solution to bridging long spans. Though a widely used structural system, several significant issues are still unresolved regarding a cable-stayed bridge's performance, particularly with respect to the response of the cables to wind. As tension members, stay cables have a very low diameter-to-span ratio such that the effect of bending stiffness on a cable's vibration characteristics is inconsequential. Coupled with this, stay cables have very little internal mechanical damping, thus they are quite susceptible to dynamic excitation. Several vibration mechanisms have been identified, however for some, including the potentially more damaging mechanisms, the required conditions and generating mechanisms are not completely understood. Aerodynamically, a stay cable is simply a circular cylinder exposed to wind. A circular cylinder positioned normal to airflow is a touchstone topic in the fields of aerodynamics and fluid mechanics. A circular cylinder inclined to airflow, from a fundamental viewpoint, has been given very little attention considering the body of work concerning the former case. The objective of this study was to determine the characteristics of the airflow about an inclined circular cylinder, and to determine and clarify necessary conditions for the generation of galloping vibrations and high-speed vortex vibrations in dry, inclined stay cables. A wind tunnel study was conducted in which a static circular cylinder was exposed, at varying relative wind-cylinder angles, to wind speeds corresponding to a Reynolds number range of 1 x 105 to 6 x 105 Surface pressure data was recorded to determine both the instantaneous and time-averaged pressures and forces on the section. Using the matrix computation software Matlab, programs were written to evaluate and analyse lift and drag forces, and pressure, lift, and drag coefficients. From the extensive data compiled, several significant conclusions concerning flow about an inclined or yawed cylinder and about the galloping and high-speed vortex vibration phenomena result. Concerning flow about an inclined circular cylinder, the drag force coefficient is generally lower for lower relative inclination angles. This trend reverses over a small range of speeds within the critical Reynolds number range. Note that this and the following findings are based on the minimum inclination angle tested of 54.7°. (Abstract shortened by UMI.)
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Chen, Lei. "Buckling of circular steel cylindrical shells under different loading conditions." Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/9435.

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Cylindrical shells are widely used in civil engineering. Examples include cooling towers, pipelines, nuclear containment vessels, steel silos and tanks for storage of bulk solids and liquids, and pressure vessels. The loading condition for these shells is quite varied depending on the function of the shell. Axial compression, global bending, external or internal pressure and wind loading are some of the most common loading forms for realistic structures. The failure of these cylindrical shell structures is often controlled by elastic or elastic-plastic buckling failure. Yield failure may occur in thick cylinders in some situations. A cylindrical shell under different loading conditions may display quite different buckling behaviour. The objective of this thesis is to investigate the characteristics of different buckling behaviours of cylindrical shell structures under axial compression, global bending, uniform external pressure and wind pressure. Some challenging practical problems in the design of these shell structures are explored. This thesis is expected to have some far-reaching impacts in defining how to design cylindrical shell structures to give them adequate strength to resist extreme events. Many aspects will be based on the latest Eurocode (EN 1993-1-6, 2007) and Recommendations (ECCS EDR5, 2008). The results show both some strength and some weaknesses in the Eurocode in design of shell structures. New methods are proposed for some practical problems. Some new conclusions and suggestions are derived and are expected to provide some useful knowledge for the improvement of the Eurocode in cylindrical shell design in general.
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Carrera, Fernando Henrique. "Estudo numérico para a determinação das pressões devidas a ação do vento em torres metálicas de seção circular /." Ilha Solteira : [s.n.], 2007. http://hdl.handle.net/11449/91496.

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Orientador: Renato Bertolino Júnior
Banca: Haroldo de Mayo Bernardes
Banca: João Alberto Venegas Requena
Resumo: O presente trabalho tem por objetivo obter numericamente os valores das distribuições de pressões devidas a ação do vento e seus respectivos coeficientes de pressões de formas externos em torres de seção circular. As distribuições de pressões nas torres são determinadas através da simulação numérica, utilizando-se o programa ANSYS 9.0, considerando-se a interação fluido-estrutura. Para a simulação numérica, a geometria da torre foi modelada tridimensionalmente, considerando como fluido o ar no qual a edificação está inserida. As distribuições de pressão foram determinadas para relações geométricas em planta da torre, entre a altura e o diâmetro (h/d), para valores menores ou iguais a 10. Posteriormente, comparam-se os resultados numéricos obtidos na simulação através do ANSYS com os valores apresentados pela norma NBR-6123:1988, a fim de verificar a viabilidade da utilização da simulação numérica na obtenção das distribuições de pressão em outras estruturas.
Abstract: The present work has for objective to obtain the distributions pressures values the wind actions in tower with circular section. The values of the distributions pressures are obtained to the numeric simulation, using the ANSYS 9.0 software and considering the flow structure interaction. In the numeric simulation, the tower geometry was considered in 3D dimension, and the flowed it is the air. The distributions pressures were certain for geometry relationships between the height and the diameter (h/d), for values smaller or equal than 10. Later, the ANSYS numeric results are compared with the presents values by the NBR 6123:1998, in order to verify the viability numeric simulation used for obtaining the pressures distributions in other structures.
Mestre
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Fisher, David T. "Wind tunnel performance comparative test results of a circular cylinder and 50% ellipse tailboom for circulation control antitorque applications." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA283335.

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Carrera, Fernando Henrique [UNESP]. "Estudo numérico para a determinação das pressões devidas a ação do vento em torres metálicas de seção circular." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/91496.

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Made available in DSpace on 2014-06-11T19:25:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-08-13Bitstream added on 2014-06-13T20:32:52Z : No. of bitstreams: 1 carrera_fh_me_ilha.pdf: 1664760 bytes, checksum: 5e03e489b4282bd00667bb00a9844991 (MD5)
PROPG
O presente trabalho tem por objetivo obter numericamente os valores das distribuições de pressões devidas a ação do vento e seus respectivos coeficientes de pressões de formas externos em torres de seção circular. As distribuições de pressões nas torres são determinadas através da simulação numérica, utilizando-se o programa ANSYS 9.0, considerando-se a interação fluido-estrutura. Para a simulação numérica, a geometria da torre foi modelada tridimensionalmente, considerando como fluido o ar no qual a edificação está inserida. As distribuições de pressão foram determinadas para relações geométricas em planta da torre, entre a altura e o diâmetro (h/d), para valores menores ou iguais a 10. Posteriormente, comparam-se os resultados numéricos obtidos na simulação através do ANSYS com os valores apresentados pela norma NBR-6123:1988, a fim de verificar a viabilidade da utilização da simulação numérica na obtenção das distribuições de pressão em outras estruturas.
The present work has for objective to obtain the distributions pressures values the wind actions in tower with circular section. The values of the distributions pressures are obtained to the numeric simulation, using the ANSYS 9.0 software and considering the flow structure interaction. In the numeric simulation, the tower geometry was considered in 3D dimension, and the flowed it is the air. The distributions pressures were certain for geometry relationships between the height and the diameter (h/d), for values smaller or equal than 10. Later, the ANSYS numeric results are compared with the presents values by the NBR 6123:1998, in order to verify the viability numeric simulation used for obtaining the pressures distributions in other structures.
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Books on the topic "Circular Wing"

1

Ahier, David James. Oscillating behaviour of a 7.5% circular arc airfoil. [Downsview, Ont.]: Dept. of Aerospace Science and Engineering, 1987.

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Spring, Robert. Circular breathing: A method. Malibu, Calif: Windplayer Publications, 2006.

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Christopoulos, George P. Oscillating-flow wind tunnel studies for a circulation control circular cylinder. Monterey, Calif: Naval Postgraduate School, 1991.

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Fox, T. A. On the use of end plates with circular cylinders in wind tunnel studies. St.Lucia: University of Queensland, Dept. of Civil Engineering, 1990.

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Burley, James R. Static investigation of circular-to-rectangular transition ducts for high-aspect-ratio nonaxisymmetric nozzles. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Wijdoogen, Carola. 7 Roles to Create Sustainable Success. NL Amsterdam: Amsterdam University Press, 2020. http://dx.doi.org/10.5117/9789082949742.

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Which roles and practices do you adopt to effectively guide businesses towards a sustainable future? And what skills and competencies do you need to establish sustainable transformation? In 7 Roles to Create Sustainable Success, Carola Wijdoogen shares the insights of 25 professionals around the world and her own experiences as Chief Sustainability Officer of Dutch Railways (NS), which she helped transform into a climate-neutral, circular and inclusive railway company. For example, the Netherlands was the first country in the world with trains running on 100% wind power. The innovative science-based 7 Roles approach is explained using an excellent collection of practices and anecdotes from (among others) Kate Raworth (Doughnut Economy) and CSOs of companies like Ingka Group, Levi Strauss & Co., Starbucks Coffee Company, Unilever Benelux, Microsoft, Kellogg Company, Interface Europe, KPN, Philips International B.V, DSM, AkzoNobel, Google, Tommy Hilfiger Global/PVH Europe, etc.
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Flaga, Andrzej. Wind vortex-induced excitation and vibration of slender structures: Single structure of circular cross-section normal to flow. Cracow: Cracow University of Technology, 1996.

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Église catholique. Diocèse de Montréal. Évêque (1840-1876 : Bourget). Circulaire au clergé de Montréal: Je m'empresse de vous adresser ci-jointe copie d'une lettre que je viens de recevoir de S. Em. le card. Barnabo au sujet du vin de messe ... [Montréal?: I. Bourget?, 1985.

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1945-, Bennett Robert M., and Langley Research Center, eds. Transonic shock-induced dynamics of a flexible wing with a thick circular-arc airfoil. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1991.

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Transonic shock-induced dynamics of a flexible wing with a thick circular-arc airfoil. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1991.

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Book chapters on the topic "Circular Wing"

1

Hu, H. "Application of the Integral Equation Method to Flows Around a Wing with Circular-Arc Section." In Boundary Elements XIII, 209–17. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3696-9_17.

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Ngouani, M. M. Siewe, Yong Kang Chen, R. Day, and O. David-West. "Low-Speed Aerodynamic Analysis Using Four Different Turbulent Models of Solver of a Wind Turbine Shroud." In Springer Proceedings in Energy, 149–54. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_19.

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AbstractThis study presents the effect of four different turbulent models of solver on the aerodynamic analysis of a shroud at wind speed below 6 m/s. The converting shroud uses a combination of a cylindrical case and an inverted circular wing base which captures the wind from a 360° direction. The CFD models used are: the SST (Menter) k-ω model, the Reynolds Stress Transport (RST) model, the Improved Delay Detached Eddies Simulation model (IDDES) SST k-ω model and the Large Eddies Simulation Wall Adaptive model. It was found that all models have predicted a convergent surface pressure. The RST, the IDDES and the WALE LES are the only models which have well described regions of pressure gradient. They have all predicted a pressure difference between the planes (1–5) which shows a movement of the air from the lower plane 1 (inlet) to the higher plane 5 (outlet). The RST and IDDES have predicted better vorticities on the plane 1 (inlet). It was also found that the model RST, IDDES, and WALE LES have captured properly the area of turbulences across the internal region of the case. All models have predicted the point of flow separation. They have also revealed that the IDDES and the WALE LES can capture and model the wake eddies at different planes. Thus, they are the most appropriate for such simulation although demanding in computational power. The movement of air predicted by almost all models could be used to drive a turbine.
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Sanchez, M., N. K. Mitra, and M. Fiebig. "Numerical Investigation of Three Dimensional Laminar Flows in a Channel with a Built-in Circular Cylinder and Wing-Type Vortex Generators." In Proceedings of the Eighth GAMM-Conference on Numerical Methods in Fluid Mechanics, 484–92. Wiesbaden: Vieweg+Teubner Verlag, 1990. http://dx.doi.org/10.1007/978-3-663-13975-1_49.

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Scuderi, Alessandro, Luisa Sturiale, Giuseppe Timpanaro, Giovanni La Via, and Biagio Pecorino. "A Possible Circular Approach for Social Perception of Climate Adaptation Action Planning in Metropolitan Cities." In Smart and Sustainable Planning for Cities and Regions, 155–69. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-57764-3_11.

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AbstractOne of the factors that will affect the livability of cities and the overall citizens’ quality of life in the future is certainly climate change. Urban areas will play a fundamental role in the commitment against climate change and will have to develop appropriate adaptation actions, in accordance with the European Strategy against climate change, including the planning and implementation of Green Infrastructures (GIs). They produce various environmental and social benefits in the urban context. Various studies have shown that citizenship involvement at all levels is necessary for the evaluation of the sharing of the proposed projects. The research proposes an innovative methodological model to support administrations in the strategic planning choice of GIs according to a shared and circular approach. To perform a multi-layer assessment, the multi-criteria evaluation will be combined with the circular evaluation model called Green City Circle. The evaluation is set up as a circular process, followed by a first investigative phase, followed by a proactive phase of solutions and an implementation phase up to a final stage of evaluation of the results and strategies for long-term sustainability. The study was carried out in the city of Catania to test a planning and management tool for GIs envisaged by the administration as win–win climate adaptation measures.
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Rani, Neelam, Ajay Pratap, and Ashok K. Ahuja. "Wind Pressure Distribution on Multi-span Semi-circular Canopy Roofs." In Lecture Notes in Civil Engineering, 831–40. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80312-4_71.

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Vankova, Zvezda. "Introduction." In IMISCOE Research Series, 1–20. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52689-4_1.

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AbstractThe policy idea of facilitating circular migration entered the European Union’s agenda more than a decade ago as part of a worldwide buzz among international organisations that it could provide a ‘triple win solution’ that would benefit all: the countries of origin and destination as well as the migrant workers themselves. According to the European Commission’s vision, this type of migration was to be facilitated in such a way as to allow some degree of legal mobility for migrants between two countries. Chapter 10.1007/978-3-030-52689-4_1 aims to introduce the understanding of this concept in the EU context and to set the scene for the book to unfold.
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Mahto, Santosh Kumar, Arvind Choubey, and Sushmita Suman. "Non-uniform Circular Array Geometry Synthesis Using Wind Driven Optimization Algorithm." In Lecture Notes in Electrical Engineering, 625–33. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2728-1_59.

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Berardi, Patricia Calicchio, Luciana Stocco Betiol, and Joana Maia Dias. "From the Vine to the Bottle: How Circular is the Wine Sector? A Glance Over Waste." In Challenges and Opportunities of Circular Economy in Agri-Food Sector, 151–75. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3791-9_9.

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Castles, Stephen, and Derya Ozkul. "Circular Migration: Triple Win, or a New Label for Temporary Migration?" In Global and Asian Perspectives on International Migration, 27–49. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08317-9_2.

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Dhiraj Kumar and Kamal Poddar. "Control of Cross-Wind Forces on a Finite Circular Cylinder at Subcritical Reynolds Number." In Fluid Mechanics and Fluid Power – Contemporary Research, 1243–51. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2743-4_118.

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Conference papers on the topic "Circular Wing"

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Rieken, William, Yoshihiro Yasumuro, Masataka Imura, Yoshitsugu Manabe, and Kunihiro Chihara. "Vision Sensor Fusion for Circular Wing Planform." In AIAA 3rd "Unmanned Unlimited" Technical Conference, Workshop and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2004. http://dx.doi.org/10.2514/6.2004-6489.

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Salem Said, Abdel-Halim, and Saad Ragab. "RANS Simulation of Circulation Control on a Circular Planform Wing." In 4th Flow Control Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-4326.

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Recktenwald, Bryan, and Anwar Ahmed. "Experimental Investigation of a Circular Planform Joined Wing Concept Aircraft." In 46th AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-371.

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Williams, David, Jesse Collins, Crystal Jankhot, Tim Colonius, and Gilead Tadmor. "Control of Flow Structure on a Semi-Circular Planform Wing." In 46th AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-597.

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Imber, Robin, and Ernest Rogers. "Investigation of a circular planform wing with tangential fluid ejection." In 34th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1996. http://dx.doi.org/10.2514/6.1996-558.

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de Marina, Hector Garcia, Zhiyong Sun, Murat Bronz, and Gautier Hattenberger. "Circular formation control of fixed-wing UAVs with constant speeds." In 2017 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). IEEE, 2017. http://dx.doi.org/10.1109/iros.2017.8206422.

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Gross, Andreas, Jianming Zhou, and Hermann F. Fasel. "Numerical Simulation of Circular Cylinders and Wing Sections in Unsteady Motion." In 45th AIAA Fluid Dynamics Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-3069.

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Sulaiman, M. A., M. T. Ali, I. Pasya, N. Ramli, H. Alias, and N. Ya'acob. "UWB microstrip antenna based on circular patch topology with stepped blocks (wing)." In 2012 IEEE Symposium on Wireless Technology & Applications (ISWTA). IEEE, 2012. http://dx.doi.org/10.1109/iswta.2012.6373857.

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Le Bras, Florent, Tarek Hamel, and Robert Mahony. "Image-based visual servo control for circular trajectories for a fixed-wing aircraft." In 2009 Joint 48th IEEE Conference on Decision and Control (CDC) and 28th Chinese Control Conference (CCC). IEEE, 2009. http://dx.doi.org/10.1109/cdc.2009.5400766.

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BENNETT, ROBERT, BRIAN DANSBERRY, MOSES FARMER, CLINTON ECKSTROM, and DAVID SEIDEL. "Transonic shock-induced dynamics of a flexible wing with a thick circular-arc airfoil." In 32nd Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1991. http://dx.doi.org/10.2514/6.1991-1107.

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Reports on the topic "Circular Wing"

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INFLUENCE OF EXECUTION TOLERANCES FOR FRICTION CONNECTIONS IN CIRCULAR AND POLYGONAL TOWERS FOR WIND CONVERTERS. The Hong Kong Institute of Steel Construction, December 2017. http://dx.doi.org/10.18057/ijasc.2017.13.4.2.

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