Relevant bibliographies by topics / Rotor sail

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  2. Conference papers

Academic literature on the topic 'Rotor sail'

Author: Grafiati
Published: 9 March 2023

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Journal articles on the topic "Rotor sail"

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Коробка, В. С., М. М. Дронь та О. В. Голубек. "МОЖЛИВОСТІ ЗАСТОСУВАННЯ СОНЯЧНОГО ВІТРИЛЬНОГО ПРИСТРОЮ ДЛЯ ВІДВЕДЕННЯ КОСМІЧНИХ ОБ’ЄКТІВ ІЗ НАПІВСИНХРОННИХ ОРБІТ". System design and analysis of aerospace technique characteristics 29, № 2 (2021): 39–48. http://dx.doi.org/10.15421/472110.

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The current state of the near-Earth space environment poses a threat to spacecraft moving not only in low and geostationary but also in semi-synchronous orbits. The main methods that can be used in these orbits for space debris removal are the active method using a rocket propulsion system and the passive method using a solar sail device. The last method is of particular interest because of the low overall mass and mass characteristics of the removal system, as well as the availability of unlimited solar light radiation, which can be converted into a driving force. Solar sails are currently un
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Klabklay, Teerawat, and Wikanda Sridech. "Optimum Solidity on Downwind Thai Sail Windmill." Trends in Sciences 18, no. 22 (2021): 42. http://dx.doi.org/10.48048/tis.2021.42.

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Solidity was a significant parameter affecting the efficiency of wind turbines. It is defined as the ratio between the projected area of all blades and the swept area of the rotor. The solidity could be improved by modifying the shape, cord length, or the number of blades. Research studies mentioned that higher solidity seemed to provide more power due to more blade area. However, it can be argued that if the solidity was too high, it would cause the airflow to be more obstructed and disrupted, causing the gained power to drop down instead. Thus, the optimum solidity, which made the wind turbi
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Tewari, S. K., and M. P. Ramesh. "Sail rotor regulation by self-activated twin spoilers (SATS)." Journal of Wind Engineering and Industrial Aerodynamics 18, no. 3 (1985): 287–300. http://dx.doi.org/10.1016/0167-6105(85)90087-x.

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Kim, Jung-eun, Dae-Hwan Cho, and Chang-Yong Lee. "Numerical Analysis Study on the Turbulent Flow Characteristics around the Rotor Sail for Vessels." Journal of the Korean Society of Marine Environment and Safety 28, no. 4 (2022): 648–56. http://dx.doi.org/10.7837/kosomes.2022.28.4.648.

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Schönborn, Alessandro. "Combination of propulsive thrust and rotational power for ships from a cyclic pitch Darrieus rotor sail." Sustainable Energy Technologies and Assessments 52 (August 2022): 102008. http://dx.doi.org/10.1016/j.seta.2022.102008.

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Ishkhanyan, M. V. "Modeling of Dynamics of Land Boat Based on the Magnus Effect." Mekhatronika, Avtomatizatsiya, Upravlenie 20, no. 4 (2019): 230–35. http://dx.doi.org/10.17587/mau.20.230-235.

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The motion of a wind powered land boat is studied. It is supposed that the land boat moves along a straight line in a steady horizontal wind flow. The axis of rotation of the Savonius rotor is vertical. The rotation of the Savonius rotors induces the Magnus force that maintains the motion of the load boat. Such vehicles can be used to perform transportation in large open areas, where there is an access to free wind. In this paper, the mathematical model of the land boat driven by the Savonius rotor is constructed. The quasi-steady approach is used to describe the aerodynamic action upon the sy
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Reche-Vilanova, Martina, Heikki Hansen, and Harry B. Bingham. "Performance Prediction Program for Wind-Assisted Cargo Ships." Journal of Sailing Technology 6, no. 01 (2021): 91–117. http://dx.doi.org/10.5957/jst/2021.6.1.91.

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Wind-Assisted Propulsion Systems (WAPS) can play a key role in achieving the IMO 2050 targets on reducing the total annual GHG emissions from international shipping by at least 50%. The present project deals with the development of a six degree of freedom (DoF) Performance Prediction Program (PPP) for wind-assisted cargo ships aimed at contributing knowledge on WAPS performance. It is a fast and easy tool, able to predict the performance of any commercial ship with three possible different WAPS installed: rotor sails, rigid wing sails and DynaRigs; with only the ship main particulars and gener
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Savinyh, Petr, Yuriy Sychugov, Vladimir Kazakov, and Bulat Ziganshin. "DEVELOPMENT AND RESEARCH OF A MACHINE FOR AIR CLEANING OF GRASS AND GRAIN SEEDS." Vestnik of Kazan State Agrarian University 16, no. 1 (2021): 84–89. http://dx.doi.org/10.12737/2073-0462-2021-84-89.

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To solve the problem of final cleaning of grain material from impurities, a pneumatic separator SP-2U-R has been developed, which allows the air flow to separate various weeds from the grain – straw impurities, weed seeds, dust, etc. To remove dust from the exhaust air, a rotary cross-flow dust collector is installed on the pneumatic separator. The novelty of the design and working process of the separator and dust collector is confirmed by patents RU No. 2165313 and No. 2122462, respectively. Theoretical studies of the working process of this dust collector are carried out. The conditions for
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Prasetyo, Arif, Mohammad Danil Arifin, and Endro Prabowo. "Application Savonius Turbine on Ferries 750 GT." KnE Energy 1, no. 1 (2015): 17. http://dx.doi.org/10.18502/ken.v1i1.341.

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<p>Vessel operating costs the highest for purchase of fuel, with the increasingly limited oil reserves and the trend of oil price increases every year this is will add to the high operating costs. Important to start doing research for deploying renewable energy on the ship, especially to reduce the use of auxiliary engine on the ship. For renewable energy applications on ships using wind energy is available throughout the day. Application on the ship using savonius turbine, with high rotor 50 cm , diameters 40 cm , use of gear ratio to increase the rotation of the rotor and the generator
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Salter, Stephen, Graham Sortino, and John Latham. "Sea-going hardware for the cloud albedo method of reversing global warming." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 366, no. 1882 (2008): 3989–4006. http://dx.doi.org/10.1098/rsta.2008.0136.

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Following the review by Latham et al . (Latham et al . 2008 Phil. Trans. R. Soc. A 366 ) of a strategy to reduce insolation by exploiting the Twomey effect, the present paper describes in outline the rationale and underlying engineering hardware that may bring the strategy from concept to operation. Wind-driven spray vessels will sail back and forth perpendicular to the local prevailing wind and release micron-sized drops of seawater into the turbulent boundary layer beneath marine stratocumulus clouds. The combination of wind and vessel movements will treat a large area of sky. When residues
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Conference papers on the topic "Rotor sail"

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Gully, Benjamin H., Michael E. Webber, and Carolyn C. Seepersad. "A Comparative Analysis of Wind Propulsion Systems for Ocean-Going Vessels." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38395.

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Recent increases in fuel prices have spurred interest in energy efficiency and alternative energy technologies. These interests are especially relevant for the marine industry, which is responsible for transporting over 90% of the world’s freight. The present global fleet of commercial ships consumes approximately 200 million tonnes of diesel fuel each year — which is expected to rise to around 350 million tonnes a year by 2020 [5]. Studies have been conducted evaluating technologies to increase seagoing propulsion efficiency as well as harness available alternative energy sources. One renewab
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McGrain, David, Gerald M. Angle, Jay P. Wilhelm, Emily D. Pertl, and James E. Smith. "Circulation Control Applied to Wind Turbines." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90076.

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The recent rise in fuel costs and global warming concerns have re-invigorated the search for alternative energy sources. Harnessing energy from the wind is a logical alternative; however the cost and efficiency of current wind turbines is a limiting factor. The use of an augmented Vertical Axis Wind Turbines (VAWTs) may become the superior choice to the more common Horizontal Axis Wind Turbines (HAWTs) that are usually associated with the harvesting of wind energy. HAWTs operate on the same principles as large airplane propellers, while VAWTs operate on lift and/or drag principles like an airp
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Juethner, Konrad, Ted Rose, J. S. Kumar, et al. "Finite Element Analysis of Bent Rotors." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-79752.

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Abstract The rotating components of a gas turbine engine are typically designed around a perfectly straight centerline. In spite of advanced manufacturing technology and the conviction of the human eye, straightness is virtually impossible to achieve during manufacturing and assembly. High-tech metrology can quantify ever so slight centerline deviations along the unconstrained rotor assembly which are called bends. Related phenomena are rotor bow and thermal bow, the latter of which is normally due to asymmetric cooling after engine shutdown. Yet, bent and bowed rotors differ from one another
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Gopalakrishnan, Padmanabhan, and Pankajkumar Sharma. "Troubleshooting of Vibration Problems in Gas Turbines With Proximity and Seismic Probes." In ASME 2013 Gas Turbine India Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gtindia2013-3569.

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Gas Turbines generally have heavy rotors and light casings, and some of them exhibit significant motion between bearing housing and free space. Hence, rotor forces would have higher transmissibility when measured on the bearing housing. This makes casing absolute measurement as bare sufficient for vibration monitoring and protection in Gas Turbines. Most of the Industrial Gas Turbines in field have their acceptable vibration limits defined in velocity units. Typically 1/2 inch per sec 0-pk is referred to as alert set point where as 1 inch per sec 0-pk as danger set point as per ISO-10816-1. Ho
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Clodic, Gaël, Aurélien Babarit, and Jean-Christophe Gilloteaux. "Wind Propulsion Options for Energy Ships." In ASME 2018 1st International Offshore Wind Technical Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/iowtc2018-1056.

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A new concept has emerged for far offshore wind energy conversion. It is the wind energy ship (1). It consists of a ship propelled by wind sails towing a water turbine. The water turbine produces electricity. The electricity is converted into a fuel (hydrogen for example). When the tanks are full, the ship sails to a terminal where the fuel is unloaded. Then, it can start a new charging cycle. An energy ship consists in several sub-systems: wind propulsion subsystem, hull, water turbine, energy storage. The focus of this paper is on the wind propulsion subsystem because of the many options ava
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Srinivasan, Anand. "Differentiating Benign and Unstable Vibrations in Integral Geared Centrifugal Compressors." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69071.

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Industrial turbomachinery pose several rotordynamic challenges with the ever expanding envelope of design parameters. Monitoring and understanding vibration signatures of rotating equipment remains to be more of an art, despite the availability of state-of-the-art design and diagnostic techniques. Vibration characteristics of any machine can broadly be classified as synchronous or non-synchronous spectra. While synchronous vibrations can be fairly easily mitigated by balancing, non-synchronous vibrations typically necessitate a more involved treatment and analysis based on the nature of the pr
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Sun, Wenyu, Xiyang Liu, and Li Yang. "An Optimization Method for Economical Ship-Routing and Ship Operation Considering the Effect of Wind-Assisted Rotors." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18776.

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Abstract With the increasingly strict regulations for energy saving and emission reduction technology of ships, minimizing fuel cost is one of the most critical issues in the design and operation of merchant ships. A method to reduce the fuel cost for merchant ship is to select an economical route based on the real-time meteorological environment and weather forecasting data. So far, numerous ship routing strategies have been proposed with the development of weather routing system. More recently, many wind-assisted devices like rotors, wind sails, etc. have been investigated and designed to ut
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Kumar, Devesh, Konrad Juethner, and Yves Fournier. "Efficient Rotordynamic Analysis Using the Superelement Approach for an Aircraft Engine." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-64954.

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The exploration of new aero-engine configurations drives unseen and complex dynamic behavior which can only be captured accurately with enhanced modeling techniques. In an earlier publication, it was established that it is possible to analyze large engine models using high-fidelity two-dimensional (2D) axisymmetric harmonic and three-dimensional (3D) shell and solid elements. This finding stands in contrast to the relatively crude one-dimensional (1D) model simplifications that were introduced several decades ago. While motivated by limited computing power and easily obtained gyroscopic terms,
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Methling, Frank-O., and Jens Kuss. "Monitoring the Approach to the Surge Line of a 4-Stage Transonic Compressor Based on Cepstral-Analysis." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-54072.

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Current research concerned with the aerodynamic instability of compressors aims at an extension of the operating range of the compressor towards decreased mass flow. In practice a safety margin is maintained between operating point and surge line to prevent the compressor from going into stall and surge. In this paper the behavior of a 4-stage transonic axial compressor before entering aerodynamic instability is investigated using the well-known Fourier-Transform as well as the Cepstral-Analysis. All results are based on measurements of the unsteady static wall pressure of only one sensor in f
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Srinivasan, Balamurugan, Anand Dhamarla, Chandiran Jayamurugan, and Amarnath Balu Rajan. "Numerical Studies on Effect of Channel Orientation in a Rotating Smooth Wedge-Shaped Cooling Channel." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26560.

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The increasing demands of better efficiency of modern advanced gas turbine require higher turbine inlet temperatures, which gives great challenges to turbine blade designers. However, the temperature limits of turbine blade material are not high enough to ensure its survival in such incredible operating temperature. Hence, both internal and external cooling approaches have been developed and widely used in today’s turbine blade. To internal cooling problems, a variety of cooling enhancement approaches, such as impingement and turbulators, are employed in order to meet the different needs in le
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