Relevant bibliographies by topics / Rotor rotation

Contents

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

Academic literature on the topic 'Rotor rotation'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Rotor rotation"

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Hou, Xukui, Ende Wang, Hui Cao, Yalong Zhu, and Kai Qi. "Research on Dynamic Balance Adjustment Method of Single Braced Frame Gyroscope Rotor." MATEC Web of Conferences 256 (2019): 02005. http://dx.doi.org/10.1051/matecconf/201925602005.

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The uneven mass distribution of gyro rotors results in vibration, rotation and drift of gyro rotors, which seriously affect the performance index and life of gyro rotors. However, because there is no rigid connection between the rotary shaft and the shell of the gyro rotor, the dynamic balancing machine can only balance the vibration component of the single braced frame gyroscope rotor, and can’t measure the gyro rotor’s rotation component. By analyzing the influence of uneven rotor mass distribution on the gyro rotor performance, a method of eliminating two rotational degrees of freedom of th
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Englberger, Antonia, Linus Wrba, Andreas Dörnbrack, and Julie K. Lundquist. "How does the rotational direction of an upwind turbine affect its downwind neighbour?" Journal of Physics: Conference Series 2265, no. 2 (2022): 022048. http://dx.doi.org/10.1088/1742-6596/2265/2/022048.

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Abstract Wind-turbine blades rotate in clockwise direction looking downstream on the rotor. During daytime conditions of the atmospheric boundary layer, the rotational direction has no influence on the turbine wakes. In stably stratified conditions occurring during night, the atmospheric inflow is often characterized by a veering inflow describing a clockwise wind direction change with height in the Northern Hemisphere. A changing wind direction with height interacting with the rotor impacts its wake characteristics (wake elongation, width and deflection). We investigate the impact on the turb
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Luan, Hengxuan, Liyuan Weng, Ranhui Liu, Dongmin Li, and Mingwei Wang. "Axial Spacing Effects on Rotor-Rotor Interaction Noise and Vibration in a Contra-Rotating Fan." International Journal of Aerospace Engineering 2019 (February 7, 2019): 1–15. http://dx.doi.org/10.1155/2019/2125976.

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Because of the potential technical advantages, the contra-rotation technology has become a renewed interest in aviation and other applications. Contra-rotation increases efficiency in comparison with the single-rotor design, but this advantage is not fully harnessed. The axial spacing of two-stage contra-rotating blade rows has a significant impact on a contra-rotating fan/compressor. The results show that with a contra-rotation pattern, the strong unsteadiness of two-stage rotors is caused by the rotor-rotor interaction. The unsteadiness of rotor 1 is caused by the potential disturbance, and
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Sharma, P. B., Y. P. Jain, and D. S. Pundhir. "A Study of Some Factors Affecting the Performance of a Contra-Rotating Axial Compressor Stage." Proceedings of the Institution of Mechanical Engineers, Part A: Power and Process Engineering 202, no. 1 (1988): 15–21. http://dx.doi.org/10.1243/pime_proc_1988_202_003_02.

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An experimental investigation of the performance of a contra-rotating stage is reported. The influence of factors such as speed ratio of the two rotors, rotor stagger, pitch-chord ratio and axial spacing between the rotors is examined from tests on a 0.66 hub-tip ratio compressor. The study reveals that the performance of a contra-rotating stage is affected by all these factors. Axial spacing between the rotors and the speed ratio of the rotors both exhibit a strong influence on the stalling behaviour of the stage. It has been found that in a stage with close axial gap, rotating stall on the f
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Lu, Wenxin, Tiantian Mu, Yuehong Zhang, et al. "A Photocontrolled Molecular Rotor Based on Azobenzene-Strapped Mixed (Phthalocyaninato)(Porphyrinato) Rare Earth Triple-Decker." Molecules 30, no. 2 (2025): 326. https://doi.org/10.3390/molecules30020326.

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Effectively regulating the rotary motions of molecular rotors through external stimuli poses a tremendous challenge. Herein, a new type of molecular rotor based on azobenzene-strapped mixed (phthalocyaninato)(porphyrinato) rare earth triple-decker complex Azo-1 is reported. Electronic absorption and 1H NMR spectra manifested the reversible isomerization of the rotor Azo-1 between the trans configuration and the cis configuration. The rotational behavior of phthalocyanine rotator in two configurations were investigated by VT-1H NMR experiments, and the results indicated that the phthalocyanine
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Kusaka, Takashi, and Takayuki Tanaka. "Stateful Rotor for Continuity of Quaternion and Fast Sensor Fusion Algorithm Using 9-Axis Sensors." Sensors 22, no. 20 (2022): 7989. http://dx.doi.org/10.3390/s22207989.

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Advances in micro-electro-mechanical systems technology have led to the emergence of compact attitude measurement sensor products that integrate acceleration, magnetometer, and gyroscope sensors on a single chip, making them important devices in the field of three-dimensional (3D) attitude measurement for unmanned aerial vehicles, smartphones, and other devices. Sensor fusion algorithms for posture measurement have become an indispensable technology in cutting-edge research, such as human posture measurement using wearable sensors, and stabilization problems in robot position and posture measu
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Wang, Zeyang, Jun Huang, Mingxu Yi, and Shaoze Lu. "A Dynamic RCS and Noise Prediction and Reduction Method of Coaxial Tilt-Rotor Aircraft Based on Phase Modulation." Sensors 22, no. 24 (2022): 9711. http://dx.doi.org/10.3390/s22249711.

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For tilt-rotor aircraft with coaxial rotors (coaxial rotor aircraft), reduction of radar cross section as well as acoustic noise can be essential for stealth design, and the rotation of the coaxial rotors can have an influence on noise and dynamic radar cross section (RCS) characteristics. In this paper, an approach to the prediction of both the sound pressure level (SPL) of noise and the dynamic RCS of coaxial-tilt aircraft is carried out, based on the theories of the FW-H equation, the physics optics method (PO) and the physical theory of diffraction (PTD) method. In order to deal with the r
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Samokhvalov, Vladimir N. "Self-excitation of non-synchronous rotation of closely spaced unbalanced rotors." Journal of Dynamics and Vibroacoustics 10, no. 3 (2024): 19–28. http://dx.doi.org/10.18287/2409-4579-2024-10-3-19-28.

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The results of experimental studies of the process of self-excitation of rotation with close coaxial arrangement of thin-walled disks, as well as rigidly and movably installed screens coaxially located with them, are considered and analyzed. Self-excitation of rotation was observed only when one dynamically unbalanced rotor (disk) rotated with a frequency of more than 50...150 Hz and when circular vibration of an initially non-rotating second rotor (disk or screen) was excited, located coaxially at a distance of 1...4 mm from it on a common rigid base. The self-excitation of the rotation of th
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Ishimatsu, Takakazu, Takashi Shimomachi, and Nobuyoshi Taguchi. "Active Control for Whirling Motion of Flexible Rotor." Journal of Robotics and Mechatronics 3, no. 4 (1991): 360–64. http://dx.doi.org/10.20965/jrm.1991.p0360.

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In a rotational machine, unbalance on the rotor is formidable since it causes resonance synchronized with the rotation of the rotor. In order to suppress this unfavorable vibration, we built an active vibration control system of flexible rotor using an electromagnetic damper. Our control system is composed of a digital controller to suppress the rotationally synchronized whirling motion and also a conventional analogue controller. Using our control system, whirling motion of the rotor under various rotating speeds was suppressed significantly.
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Peng, Jifeng. "Effects of Aerodynamic Interactions of Closely-Placed Vertical Axis Wind Turbine Pairs." Energies 11, no. 10 (2018): 2842. http://dx.doi.org/10.3390/en11102842.

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In this study, a numerical model was developed to study the effects of aerodynamic interactions between a pair of counter-rotating vertical axis wind turbines (VAWTs) in close proximity. In this model, the rotor rotation is not prescribed as a constant as in most other studies, but is determined by the moment of inertia and the total torque of the rotor, including the aerodynamic torque, generator torque, and a torque representing friction. This model enables study of the behavior of the rotor under an arbitrary ambient wind profile. The model was applied to an isolated rotor with five straigh
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Dissertations / Theses on the topic "Rotor rotation"

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Picard, Mathieu. "Dynamique des gaz et combustion du Rim-Rotor Rotary Ramjet Engine (R4E)." Mémoire, Université de Sherbrooke, 2011. http://savoirs.usherbrooke.ca/handle/11143/1607.

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Le Rim-Rotor Rotary Ramjet Engine (R4E) a le potentiel de remplacer les turbines à gaz de 1 MW et moins en offrant : (1) une densité de puissance de 7.6 kW/kg, soit le double des turbines à gaz actuelles, (2) une meilleure fiabilité et un moindre coût par sa pièce mobile unique et (3) une efficacité de plus de 20 %, soit similaire aux turbines à gaz de cette puissance.Le R4E convertit la grande vitesse tangentielle du mélange air-carburant, idéalement 1000 m/s, en une grande pression dans la chambre de combustion. La combustion des réactifs augmente le volume du gaz ce qui force les produits à
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Ooten, Michael Kenneth. "Unsteady Aerodynamic Interaction in a Closely-Coupled Turbine Consistent with Contra-Rotation." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1406663581.

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Stefak, Roman. "Synthèse de machines moléculaires pour le contrôle de mouvements de rotation et de translation." Toulouse 3, 2013. http://thesesups.ups-tlse.fr/2124/.

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Cette thèse s'inscrit dans le domaine des nanosciences. Ce manuscrit présente les travaux réalisés dans le but de mieux comprendre les mouvements de rotation et de translation enregistrés au sein de molécules lorsque celles-ci sont manipulées à l'échelle de la molécule unique. Nous avons tout d'abord étudié la dissymétrisation du stator (partie inférieure du moteur) par deux groupements biphénylènes. Ce fragment a été choisi par analogie avec le sexiphényle qui peut se déplacer sur une surface dans un mouvement analogue à une reptation, les deux groupements biphénylènes devant permettre à la m
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Gulyuk, Vasyl, and Василь Ярославович Гулюк. "Evaluation of the inertia of the change in the speed of rotation of the lifting rotors on the dynamics of the motion of a heavy quadrocopter." Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/50743.

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1. Rogozhin V.A., Sineglazov V.M., Filyashkin N.. Automated aircraft control systems: K .: NAU, 2003, - 502 p. 2. Geng K., Chulin N. A. Stabilization algorithms for automatic control of the trajectory motion of a quadcopter. // Electronic journal «Science and education». Proceedings of MSTU. - 2015- № 83, pp. 218–235.<br>Unlike a helicopter, which uses a swashplate for control, which changes direction of the lifting rotor thrust, and the total pitch and adequately the magnitude of the rotor thrust, in the quadcopter (QC) the thrust direction relative to the body and the pitch of the rotor bla
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Berton, Eric. "Contribution à l'étude de l'écoulement induit autour et dans le sillage de surfaces portantes en rotation : application au rotor d'hélicoptère en vol stationnaire." Aix-Marseille 2, 1992. http://www.theses.fr/1992AIX22062.

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L'etude du champ aerodynamique d'un rotor d'helicoptere en vol stationnaire, est menee suivant les deux approches experimentale et numerique. Une analyse du comportement aerodynamique complet des pales du rotor est effectuee a partir de mesures d'efforts globaux, de champs de vitesse, de circulations et par des visualisations des structures tourbillonnaires emises par les extremites. Au niveau du sillage, cette analyse concerne la determination de la geometrie des lignes tourbillonnaires marginales et des champs de vitesse 3d. Sur le plan experimental, l'ecoulement autour des pales munies de d
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Barbosa, Emerson. "Etude numérique des écoulements tridimensionnels dans des cuves cylindriques rotor-stator." Phd thesis, Université d'Evry-Val d'Essonne, 2002. http://tel.archives-ouvertes.fr/tel-00354646.

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L'écoulement d'un fluide visqueux incompressible dans une cuve cylindrique rotor-stator est étudié. Ces écoulements ont fait l'objet de récents travaux numériques tridimensionnels pour des rapports d'aspect h>1,75. On propose une étude numérique de la rupture de l'axisymétrie de l'écoulement dans une cavité de rapport d'aspect réduit (h=1 et 1,5) et des nombres de Reynolds Re<8500. Les équations de Navier-Stokes sont résolues par un code vitesse-pression en coordonnées cylindriques qui repose sur des méthodes aux différences finies du second ordre. Deux approches numériques sont mises en œuvre
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Farhadi, Rahmat-Abadi K. "An experimental investigation of the combined effect of rotation and internal ribbing on heat transfer in turbine rotor blade cooling channels." Thesis, Swansea University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636955.

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This thesis reports the results of an experimental investigation of the effect of orthogonal rotation and radially outward flow on heat transfer inside circumferentially ribbed circular test sections. These test sections are intended to model the internal cooling passages of gas turbine rotor blades to enable them to run at elevated operating temperature. Four test section geometries were used with active length to bore diameter ratios of 6.5, 9.75, 11.0 and 13.0. Tests were performed on stationary and rotating sections, with through flow Reynolds numbers in the range 15 000 to 30 000. The res
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Boutarfa, Rachid. "Etude expérimentale des échanges convectifs sur un disque en rotation placé face à un disque fixe." Valenciennes, 2001. https://ged.uphf.fr/nuxeo/site/esupversions/29baac3c-b1cf-4de7-9d27-9a3840891430.

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Ce travail de thèse porte sur l'étude expérimentale des échanges convectifs sur un disque en rotation (rotor) placé face à un disque fixe (stator). La méthode expérimentale employée est basée sur l'utilisation de la thermographie infrarouge pour accéder à la mesure des températures de surface du rotor et sur la résolution numérique de l'équation de l'énergie en régime stationnaire, pour évaluer les coefficients d'échange convectifs locaux. L'étude de la structure de l'écoulement entre le rotor et le stator est obtenue à l'aide de la PIV (Vélocimétrie par Images de particules). Les essais sont
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Kersell, Heath Ryan. "Investigations on the Complex Rotations of Molecular Nanomachines." Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1307126123.

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Aymard, Emmanuel. "Détermination des efforts aérodynamiques s'exerçant sur une surface portante en rotation par une méthodologie basée sur la vélocimétrie laser : application aux pales d'un rotor d'hélicoptère en vol d'avancement." Aix-Marseille 2, 1998. http://www.theses.fr/1998AIX22113.

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Ce mémoire de thèse se fixe comme objectif d'analyser l'aérodynamique d'un rotor d'hélicoptère en configuration de vol d'avancement, et plus particulièrement de réaliser une nouvelle approche de la mesure des efforts aérodynamiques (trainée, portance) s'exerçant sur la pale du rotor d'hélicoptère. L'écoulement autour des pales en rotation et dans le sillage proche a pu expérimentalement être analyse très finement à partir de différentes techniques de mesure (balance rotative, anémométrie a fil chaud) et en particulier par la mesure du champ de vitesse obtenues par une méthode avancée de véloci
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Books on the topic "Rotor rotation"

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Conference on Mechanical Vibration and Noise (12th 1989 Montreal, Quebec). Rotating machinery dynamics. American Society of Mechanical Engineers, 1989.

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Adams, Maurice L. Rotating Machinery Vibration. Marcel Dekker, Inc., 2003.

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Adams, Maurice L. Rotating machinery vibration: From analysis to troubleshooting. 2nd ed. Taylor & Francis, 2010.

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Adams, Maurice L. Rotating machinery vibration: From analysis to troubleshooting. Taylor & Francis, 2010.

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International Symposium on Transport Phenomena, Dynamics, and Design of Rotating Machinery (2nd 1988 Honolulu, Hawaii). Dynamics of rotating machinery: Proceedings of the Second International Symposium on Transport Phenomena, Dynamics, and Design of Rotating Machinery, part II. Hemisphere Pub. Corp., 1990.

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Carek, Gerald A. Improved method for stress and compatibility analysis of multicomponent rotating systems. National Aeronautics and Space Administration, 1988.

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H, Mirick Paul, Langston Chester W, and Langley Research Center, eds. Rotating shake test and modal analysis of a model helicopter rotor blade. National Aeronautics and Space Administration, Langley Research Center, 1997.

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International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (3rd 1990 Honolulu, Hawaii). Rotating machinery--dynamics: Proceedings of the Third International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-3). Hemisphere Pub. Corp., 1992.

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Hodges, Dewey H. Nonlinear equations for dynamics of pretwisted beams undergoing small strains and large rotations. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Singh, Rajendra. Vibration transmission through rolling element bearings in geared rotor systems. National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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Book chapters on the topic "Rotor rotation"

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Schmiedt, Hanno. "The Molecular Super-Rotor." In Molecular Symmetry, Super-Rotation, and Semiclassical Motion. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66071-4_7.

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Schmiedt, Hanno. "Super-Rotor States and Their Symmetry." In Molecular Symmetry, Super-Rotation, and Semiclassical Motion. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66071-4_8.

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Shi, Qian, Yichen Yao, and Suyuan Yu. "The Design of the Robust Controller for Active Magnetic Bearings on Active Disturbance Rejection Technology." In Springer Proceedings in Physics. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_99.

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AbstractActive magnetic bearings (AMBs) have advantages of no friction, no lubrication or sealing requirements, long lifespan, low maintenance cost, and, especially, active controllability of dynamic characteristics. Thus, AMBs are now widely used in helium-turbine circle of the high temperature gas-cooled reactor and many other high-speed rotating machinery. The design of controller is the core problem of AMBs. The AMB force has high nonlinearity and the AMBs-rotor system may be influenced by external disturbance during operation, which increase the threshold of the controller robustness and
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Peng, Chao, and Alessandro Tasora. "Eigenvalues of the Free Rotation Mode of the Multi-bladed Rotor." In Proceedings of the 11th IFToMM International Conference on Rotordynamics. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-40455-9_39.

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Akkermans, R. A. D., J. W. Delfs, C. O. Márquez, et al. "Aeroacoustic and Aerodynamic Importance of Unequal Rotor Rotation Speeds of a CROR." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-03158-3_60.

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Branlard, Emmanuel. "Cylindrical Model of a Rotor with Varying Circulation - Effect of Wake Rotation." In Research Topics in Wind Energy. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-55164-7_18.

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Vityazev, V. V. "The Rotor: Rotation of Frames Via Representation of Systematic Differences in Terms of Spherical Functions." In Dynamics and Astrometry of Natural and Artificial Celestial Bodies. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5534-2_66.

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Ewing, George E., Robert J. Longfellow, David B. Moss, and Charles S. Parmenter. "Van Der Waals Coupling Between Internal Rotation and Molecular Vibrations. The Methyl Rotor Effect on IVR." In Stochasticity and Intramolecular Redistribution of Energy. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3837-3_12.

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Volodin, Pylyp. "Analysis of Blade Rotations." In Blade Element Rotor Theory. CRC Press, 2022. http://dx.doi.org/10.1201/9781003296232-5.

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Vince, John. "Bivector Rotors." In Rotation Transforms for Computer Graphics. Springer London, 2011. http://dx.doi.org/10.1007/978-0-85729-154-7_12.

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Conference papers on the topic "Rotor rotation"

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Lienard, Caroline, Raphaël Fukari, Itham Salah, and Thomas Renaud. "RACER high-speed demonstrator: Rotor and rotor-head wake interactions with tail unit." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0074-2018-12699.

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Within the framework of NACOR project in CleanSky 2 AIRFRAME ITD, ONERA and DLR performed parallel investigations dealing with the RACER high-speed demonstrator, and especially with its tail parts, each partner respectively focusing on vertical fins (ONERA) and horizontal stabilizer (DLR). During this design phase, most of the CFD simulations were steady-state and neglected the effect of the rotor (or rotor-head) and of the propellers. It however turned out that the rotor-head had a significant effect on the vertical fins and that it was essential to take into account its rotation in time-accu
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G., Berend. "Orthogonal Vortex­Rotor Interference: Rotor Trim and Blade Flapping." In Vertical Flight Society 74th Annual Forum & Technology Display. The Vertical Flight Society, 2018. http://dx.doi.org/10.4050/f-0074-2018-12830.

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Rotors of vertical take-off and landing vehicles (main rotor, tail rotor, and propeller) are often subjected to interaction with vortices from other lifting devices. Interactions with vortices whose axis are essentially parallel to the rotor plane of rotation are widely investigated and understood, especially with respect to blade-vortex interaction (BVI) phenomena. Interactions of rotor blades with vortices oriented normal to the rotor disk were rarely investigated and this article focuses on this type of interaction. It is a fundamental study that is intended to contribute to future flight d
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Xu, Jian, Xiang Gao, and Lan Ma. "Research on vibration fault diagnosis of fan rotor rotation test system." In 4th International Conference on Advanced Manufacturing Technology and Electronic Information (AMTEI 2024), edited by Wenfeng Hu, Wennian Yu, and Aniruddha Bhattacharjya. SPIE, 2025. https://doi.org/10.1117/12.3054292.

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Richter, Kai, and Erich Schülein. "Boundary Layer Transition Measurements on Hovering Helicopter Rotors by Infrared Thermography." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9435.

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High speed infrared thermography was applied for boundary layer transition measurements on the upper side of helicopter rotors. The transition detection is based on the analysis of a single instantaneous thermal image of the rotating blade and allows the determination of both the locations of the onset and of the end of the transition region. Measurements were performed on a Mach scaled BO105 model rotor for different rotation frequencies. The transition characteristics are presented and compared to two-dimensional numerical simulations, and the measurement scatter is discussed. Additional tra
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Reboul, Gabriel, and Andrea Bresciani. "LBM Simulations of Co-axial Rotors." In Vertical Flight Society 81st Annual Forum and Technology Display. The Vertical Flight Society, 2025. https://doi.org/10.4050/f-0081-2025-29.

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In the context of developing new rotorcrafts dedicated to Advanced Air Mobility, aeroacoustic simulations of co-axial rotor systems have been conducted using the lattice Boltzmann method with the ProLB code. Eight configurations, spanning from co-rotating rotors to contra-rotating shrouded rotors, were analyzed in stationary conditions through comparisons with experimental data and flow field analysis. This investigation validates our numerical methodology, based on direct noise simulation, and enhances our understanding of noise generation and propagation of such propulsive systems. Our simul
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Graffeo, Federica, Silvio Vaschetto, Alberto Tenconi, Gerd Bramerdorfer, and Andrea Cavagnino. "Advanced Magnetic Equivalent Circuit Modeling for Electrically Excited Synchronous Machines with Rotor Rotation." In 2025 IEEE International Electric Machines & Drives Conference (IEMDC). IEEE, 2025. https://doi.org/10.1109/iemdc60492.2025.11061064.

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Zawodny, Nikolas, D. Boyd, and Casey Burley. "Acoustic Characterization and Prediction of Representative, Small-Scale Rotary-Wing Unmanned Aircraft System Components." In Vertical Flight Society 72nd Annual Forum & Technology Display. The Vertical Flight Society, 2016. http://dx.doi.org/10.4050/f-0072-2016-11346.

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In this study, hover performance and acoustic measurements are taken on two different isolated rotors representative of small-scale, rotary-wing unmanned aircraft systems (UAS) for a range of rotation rates. Each rotor system consists of two fixed-pitch blades powered by a brushless motor. For nearly the same thrust condition, significant differences in overall sound pressure level (OASPL), up to 8 dB, and directivity were observed between the two rotor systems. Differences are shown to be in part attributed to different rotor tip speeds, along with increased broadband and motor noise levels.
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Baz, Ahmed M., Nabil A. Mahmoud, Ashraf M. Hamed, and Khaled M. Youssef. "Optimization of Two and Three Rotor Savonius Wind Turbine." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43988.

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The present work investigates the performance of Savonius wind turbine using two or three rotors. The new turbine design was found to have higher power coefficient compared with single rotor design. The peak average power coefficient of the three rotors was computed to be 50% higher than that of the single rotor design. The torque coefficient was also higher than that of the single rotor turbine at high tip speed ratio. This improved performance is attributed to the favorable aerodynamic interaction between the rotors which accelerates the flow around the rotors and generates higher turning to
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9

Neumann, M. A., M. Plazanet, and M. R. Johnson. "Rotation-precession and rotor-rotor coupling in 4-methyl- pyridine." In Neutrons and numerical methods. AIP, 1999. http://dx.doi.org/10.1063/1.59468.

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10

Yang, Yingchen. "Waves to Drive a Direct Rotor for Unidirectional Rotation." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64394.

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Ocean waves constitute a massive source of renewable energy. However, ocean wave energy is highly underutilized. In the present work, a new approach for wave energy harvesting is discussed. A direct-drive rotor is employed as a key component of a wave energy converter (WEC). The rotor absorbs wave energy and performs unidirectional rotary motion. This approach is in contrast to the overly dominant existing technologies that utilize wave-driven oscillation (either linear or angular, e.g., heave, surge or pitch) for energy conversion. It is also different from the very few existing technologies
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Reports on the topic "Rotor rotation"

1

van Dam, C. P., David D. Chao, and Dale E. Berg. CFD analysis of rotating two-bladed flatback wind turbine rotor. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/932883.

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2

Andriulli, J. B. A simple rotational pendulum method to measure the radii of gyration or mass moments of inertia of a rotor and other assemblies. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/416947.

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