Bibliografie tematiche / Rotors – Dynamics

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Letteratura scientifica selezionata sul tema "Rotors – Dynamics"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 7 settembre 2023

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Articoli di riviste sul tema "Rotors – Dynamics"

1

Liu, Bao Guo, Hai Feng Hua, Long Wang Yue, and Xiao Ding Xu. "Design of the Post-Processor for Rotors Dynamics Based on the STEP Standard." Advanced Materials Research 706-708 (June 2013): 1871–76. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.1871.

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The STEP standard is an international standard for data expressing and exchanging during the whole life cycle of the product, the neutral file is an universal data exchange form for the data exchanging. In order to develop a STEP post-processer for the rotor dynamics analysis software-Rotors Dynamics, the author elaborates the lexical analysis module and data mapping module, studies the rotor model parameter extraction based on STEP neutral file, and realizes the seamless connectivity between the Rotors Dynamics and the rotor’s CAD model.
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2

Jalal, Sara, Fernando Ponta, Apurva Baruah, and Anurag Rajan. "Dynamic Aeroelastic Response of Stall-Controlled Wind Turbine Rotors in Turbulent Wind Conditions." Applied Sciences 11, no. 15 (July 27, 2021): 6886. http://dx.doi.org/10.3390/app11156886.

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With the current global trend of the wind turbines to be commissioned, the next generation of state-of-the-art turbines will have a generating capacity of 20 MW with rotor diameters of 250 m or larger. This systematic increase in rotor size is prompted by economies-of-scale factors, thereby resulting in a continuously decreasing cost per kWh generated. However, such large rotors have larger masses associated with them and necessitate studies in order to better understand their dynamics. The present work regarding the aeroelastic behavior of stall-controlled rotors involves the study of the fre
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Zaytsev, Nikolay, Denis Zaytsev, Andrey Makarov, and Dmitriy Mineev. "NUMERICAL SIMULATION OF THE DYNAMICS OF A FLEXIBLE ROTOR WITH TWO BALL AUTO-BALANCERS." Perm National Research Polytechnic University Aerospace Engineering Bulletin, no. 62 (2020): 31–44. http://dx.doi.org/10.15593/2224-9982/2020.62.04.

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Ball auto-balancing devices can to compensate changes of unbalance "on the move" only for rotors operating at supercritical speeds. For automatic balancing of such rotors, classified as flexible rotors, several auto-balancers located in different cross sections of the shaft are necessary. This makes it necessary to account bending fluctuations on studies of dynamics of the rotor with auto-balancers, that is especially important in the design of the real rotors. In view of the complexity of experimental studies of such rotors in the article the method of direct numerical simulation of the dynam
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Pacholczyk, Michał, and Dariusz Karkosiński. "Parametric Study on a Performance of a Small Counter-Rotating Wind Turbine." Energies 13, no. 15 (July 29, 2020): 3880. http://dx.doi.org/10.3390/en13153880.

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A small Counter-Rotating Wind Turbine (CRWT) has been proposed and its performance has been investigated numerically. Results of a parametric study have been presented in this paper. As parameters, the axial distance between rotors and a tip speed ratio of each rotor have been selected. Performance parameters have been compared with reference to a Single Rotor Wind Turbine (SRWT). Simulations were carried out with Computational Fluids Dynamics (CFD) solver and a Large Eddy Scale approach to model turbulences. An Actuator Line Model has been chosen to represent rotors in the computational domai
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Fan, Ye Sen, San Min Wang, and Zhen Yang. "Dynamic Characteristics of the Coupled System of the High Pressure Rotor and the Radial Driveshaft of a Turbofan Engine." Advanced Materials Research 44-46 (June 2008): 127–34. http://dx.doi.org/10.4028/www.scientific.net/amr.44-46.127.

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In a turbofan engine, the high pressure rotor and the radial driveshaft, which transmit the power from the internal gear-box to the external gear-box, are geared by a spiral bevel gear pair. In this paper, a reasonably simplified dynamic model of the coupled rotors system is established, and then, the coupled stiffness matrix and coupled damping matrix of the spiral bevel gear pair are deduced. A shaft element method is proposed to investigate the lateral-torsional coupled vibration equations of the gear-rotor system. Furthermore, the mode shapes and unbalance responses of this two rotors coup
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Pacholczyk, Michał, Krzysztof Blecharz, and Dariusz Karkosiński. "Numerical investigation on the performance of a small counter-rotating wind turbine." E3S Web of Conferences 116 (2019): 00055. http://dx.doi.org/10.1051/e3sconf/201911600055.

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The article presents results of the investigation on the performance of a small counter-rotating wind turbine. Wind turbine has been simulated using Computational Fluid Dynamics methods. Actuator Line Model has been successfully used to represent rotors in computational domain. Parametric study has been carried out, taking into account changes in the tip speed ratio of the rotors while maintaining a constant distance between upwind and downwind rotor. Study results revealed noticeable increase in power coefficient for optimal configuration. Dynamic interaction between rotors has been investiga
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Mimmi, G., and P. Pennacchi. "Analytical model of a particular type of positive displacement blower." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 213, no. 5 (May 1, 1999): 517–26. http://dx.doi.org/10.1243/0954406991522743.

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Abstract (sommario):
Many papers exist in the literature that deal with the twin-screw compressor. This usually has two different rotors, a male and a female, and is commonly used to produce compressed gas for industrial uses. However, a different type of positive displacement rotary compressor with two screws is sometimes used, one of its typical applications being in car engine supercharging. The present paper deals with the latter type, which is defined as a two-screw blower. This blower has two identical helical rotors, each with three lobes. The kinematics and the geometry of the rotors are analysed here, and
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Kaleta, Jiří, Josef Michl, Cécile Mézière, Sergey Simonov, Leokadiya Zorina, Pawel Wzietek, Antonio Rodríguez-Fortea, Enric Canadell, and Patrick Batail. "Gearing motion in cogwheel pairs of molecular rotors: weak-coupling limit." CrystEngComm 17, no. 41 (2015): 7829–34. http://dx.doi.org/10.1039/c5ce01372k.

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Investigation of the rotor dynamics by X-ray diffraction, spin–lattice relaxation, and DFT modelling of the two rotational barriers in arrays of rod-like molecules with 1,3-bis(ethynyl)bicyclo[1.1.1]pentane rotators conclude to gearing motion between two rotors in a pair.
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Muszynska, Agnes, Charles T. Hatch, and Donald E. Bently. "Dynamics of Anisotropically Supported Rotors." International Journal of Rotating Machinery 3, no. 2 (1997): 133–42. http://dx.doi.org/10.1155/s1023621x97000134.

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The paper discusses dynamic effects occurring in machinery rotors supported in bearings and pedestals with laterally different characteristics. In the considered rotor model the anisotropy of radial stiffness and tangential (“cross”) stiffness components are included. Within certain ranges of the rotative speed the support anisotropy leads to the specific, excited-by-unbalance rotor lateral synchronous vibrations in a form of backward (reverse) precession. In addition, one section of the rotor may precess backward, while the other section simultaneously precesses forward. Experimental results
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Mimmi, Giovanni, and Paolo Pennacchi. "Compression Load Dynamics in a Special Helical Blower: A Modeling Improvement." Journal of Mechanical Design 123, no. 3 (October 1, 1999): 402–7. http://dx.doi.org/10.1115/1.1377016.

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The instantaneous variation of pressure loads acting on the rotors of positive displacement rotary blowers may produce vibrations and noise that in some case produce the failure of the machine and of the piping. In a previous paper the authors determined the pressure loads acting on the rotors, starting from the geometry of the chambers that are formed during the rotor meshing and the thermodynamic transformation of the working fluid. The calculation of the loads has been made in a quasi-static manner. In this paper the model has been improved by taking into account the effects due to a closed
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Tesi sul tema "Rotors – Dynamics"

1

Jarroux, Clément. "Nonlinear transient dynamics of on-board rotors supported by Active Magnetic Bearings." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI069/document.

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De manière générale, les turbomachines sont des machines tournantes permettant la conversion des différents types d’énergie. Ces dernières sont composées d’une partie mécanique en rotation, appelée rotor, interagissant avec un fluide. La rotation a donc un rôle clé pour ces machines et la liaison entre les parties fixes et les parties tournantes, appelée palier, est primordiale pour un fonctionnement fiable et optimal. Les turbomachines supportées par des paliers magnétiques actifs (PMAs) sont de plus en plus utilisées par les industriels notamment grâce à l’absence de contact direct entre par
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Matos, Catherine Anne Moseley. "Download reduction on a wing-rotor configuation." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/12058.

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Rigsby, James Michael. "Stability and control issues associated with lightly loaded rotors autorotating in high advance ratio flight." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26536.

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Thesis (Ph.D)--Aerospace Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: J.V.R. Prasad; Committee Member: Daniel P. Schrage; Committee Member: David A. Peters; Committee Member: Dewey H. Hodges; Committee Member: Lakshmi N Sankar. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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El-Shafei, Aly. "Dynamics of rotors incorporating squeeze film dampers." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/87804.

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He, Chengjian. "Development and application of a generalized dynamic wake theory for lifting rotors." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/12389.

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Bitzer, Michael. "Identification of an improved body aerodynamics model for the BO 105." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/13832.

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Riley, Troy M. "Aeroacoustics and Fluid Dynamics Investigation of Open and Ducted Rotors." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1627667464605408.

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Mendes, Ricardo Ugliara 1987. "Desenvolvimento de um sistema de atuação magnética para excitação de sistemas rotativos." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264158.

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Orientadores: Kátia Lucchesi Cavalca Dedini, Luiz Otávio Saraiva Ferreira<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-17T15:03:09Z (GMT). No. of bitstreams: 1 Mendes_RicardoUgliara_M.pdf: 2835811 bytes, checksum: c8cae753b116c3893246e25fb64fdf4c (MD5) Previous issue date: 2011<br>Resumo: Máquinas rotativas apresentam um vasto campo de aplicação como aeronaves, fábricas, laboratórios e usinas de energia. Estas aplicações contêm eixos girando a altas velocidades que devem ter alto nível de confiabilidade
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Medeiros, Everton Coelho de. "Projeto e avaliação do comportamento dinâmico de um conjunto de mancais hidrodinâmicos aplicados a um rotor Jeffcott /." Guaratinguetá, 2017. http://hdl.handle.net/11449/151475.

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Orientador: Mauro Hugo Mathias<br>Coorientador: Willy Roger de Paula Mendonça<br>Banca: José Elias Toamzini<br>Banca: Everaldo de Barros<br>Resumo: Os estudos relacionados a máquinas rotativas são muito importantes no apoio e manutenção da operação de máquinas de grande porte, tais como turbo compressores ou turbinas. Modelos analíticos e numéricos têm sido aplicados por anos, entretanto, eles nem sempre apresentam as condições reais dessas máquinas. Por isso, o uso de procedimentos experimentais para a avaliação e validação de resultados de máquinas rotativas é importante para a etapa de proj
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Jayasuriya, Arachige Tilak A. "Dynamics of unbalanced rotors on rigid and flexible bearings." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0016/MQ48062.pdf.

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Libri sul tema "Rotors – Dynamics"

1

Kiciński, Jan. Rotor dynamics. 2nd ed. Gdańsk: Wydawn. IMP PAN, 2006.

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2

Krämer, Erwin. Dynamics of Rotors and Foundations. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02798-1.

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Dynamics of rotors and foundations. Berlin: Springer-Verlag., 1993.

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Krämer, Erwin. Dynamics of Rotors and Foundations. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993.

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5

Rao, J. S. Rotor dynamics. 2nd ed. New York: J. Wiley, 1991.

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Rao, J. S. Rotor dynamics. 2nd ed. New Delhi: Wiley Eastern, 1991.

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I, Friswell M., ed. Fundamentals of rotor dynamics. New York: Cambridge University Press, 2010.

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8

Conference on Mechanical Vibration and Noise (12th 1989 Montreal, Quebec). Rotating machinery dynamics. New York, N.Y. (345 E. 47th St., New York 10017): American Society of Mechanical Engineers, 1989.

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9

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). Washington: Hemisphere Pub. Corp., 1992.

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10

Rotordynamics. Boca Raton: Taylor & Francis, 2005.

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Capitoli di libri sul tema "Rotors – Dynamics"

1

Krämer, Erwin. "Cracked Rotors." In Dynamics of Rotors and Foundations, 329–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02798-1_23.

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Krämer, Erwin. "Vertical Rotors." In Dynamics of Rotors and Foundations, 115–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02798-1_8.

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Nordmann, Rainer. "Dynamics of Flexible Rotors." In Magnetic Bearings, 251–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00497-1_10.

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Genta, Giancarlo. "Dynamics of controlled rotors." In Mechanical Engineering Series, 581–613. New York, NY: Springer US, 2005. http://dx.doi.org/10.1007/0-387-28687-x_16.

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Krämer, Erwin. "Bending Stresses in Rotors." In Dynamics of Rotors and Foundations, 325–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02798-1_22.

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Krämer, Erwin. "Rotors with Oil-film Bearings." In Dynamics of Rotors and Foundations, 97–114. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02798-1_7.

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Krämer, Erwin. "Introduction." In Dynamics of Rotors and Foundations, 3–6. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02798-1_1.

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Krämer, Erwin. "Shaft Seals." In Dynamics of Rotors and Foundations, 143–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02798-1_10.

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Krämer, Erwin. "Steam Whirl." In Dynamics of Rotors and Foundations, 161–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02798-1_11.

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Krämer, Erwin. "Internal Damping." In Dynamics of Rotors and Foundations, 169–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02798-1_12.

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Atti di convegni sul tema "Rotors – Dynamics"

1

Marin, Manuel A. "Rotor Dynamics of Overhung Rotors: Hysteretic Dynamic Behavior." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68285.

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Overhung-configuration rotors are commonly used in the oil, gas and process industries. Examples of this type of equipment include power turbines, Fluid Catalytic Cracking (FCC) expanders, turbochargers and pipeline boosters. Generally, in overhung-configuration rotors, the mass concentration is near the bearing on the overhung end, so the rotor dynamics behavior of these overhung-configuration rotors is different than other equipments that have their mass concentrations between the bearing spans, such as multistage compressors. Among the more important characteristics that directly affect the
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Friedmann, Peretz, Kuo-An Yuan, Thomas Millott, and Comandur Venkatesan. "Correlation studies for hingeless rotors in forward flight." In Dynamics Specialists Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1994. http://dx.doi.org/10.2514/6.1994-1722.

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Beylich, Alfred E. "An interlaced system for rigid rotors." In RAREFIED GAS DYNAMICS: 22nd International Symposium. AIP, 2001. http://dx.doi.org/10.1063/1.1407593.

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Steijl, R., G. Barakos, and K. Badcock. "A CFD Framework for Analysis of Helicopter Rotors." In 17th AIAA Computational Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-5124.

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Gupta, K., R. Kumar, M. Tiwari, and O. Prakash. "Effect of Rotary Inertia and Gyroscopic Moments on Dynamics of Two Spool Aeroengine Rotor." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-045.

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The main objective of the paper is to study the effect of rotary inertia and gyroscopic moments due to lumped masses on the dynamics of two spool aeroengine rotors. Since the rotary inertia effect is well established, the thrust of the paper is on the effect of gyroscopic moments. Quantitative as well as qualitative aspects are studied. Effect of gyroscopics and rotary inertia on rotor critical speeds and unbalance response are studied for several rotors with particular reference to relative LP and HP rotor speeds. A two spool rig which resembles an actual aeroengine has been designed and buil
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Iancu, Florin, Janusz Piechna, and Norbert Müller. "Numerical Solutions for Ultra-Micro Wave Rotors (UmWR)." In 35th AIAA Fluid Dynamics Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-5034.

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Tatossian, Charles, and Siva Nadarajah. "Optimum Shape Design of Helicopter Rotors via Control Theory." In 18th AIAA Computational Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-3951.

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Daly, John, Elvis Sheik Bajeet, Ajit Thakker, and Patrick Frawley. "A 3D Computational Fluid Dynamics Analysis of the Wells Turbine." In ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31321.

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This paper deals with the application of Computational Fluid Dynamics (CFD) to the performance comparison of some proposed blade designs for the Well’s Turbine. The turbines were modelled at typical Reynolds numbers for full scale rigs and the results were found to correlate well with scale predictions from experimental data. Three different turbine designs were analysed, one a 4-bladed rotor and the other two 8-bladed rotors. The only difference between the two 8-bladed rotors was the addition of forward sweep to one. The addition of forward sweep was shown to have little effect on the overal
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Dang, Ying, S. Subramanian, and Gopal Gaonkar. "Modeling turbulence seen by multibladed rotors for predicting rotorcraft response with three-dimensional wake." In Dynamics Specialists Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1996. http://dx.doi.org/10.2514/6.1996-1217.

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Shang, Xiaoyang, and Dewey Hodges. "Aeroelastic stability of composite hingeless rotors with advanced configurations." In 37th Structure, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1996. http://dx.doi.org/10.2514/6.1996-1548.

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Rapporti di organizzazioni sul tema "Rotors – Dynamics"

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Zheng, Wanzheng, and Jason Merret. Aerodynamic Survey of Novel eVTOL Configuration Using SU2. Illinois Center for Transportation, August 2022. http://dx.doi.org/10.36501/0197-9191/22-014.

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This report summarizes computational fluid dynamics (CFD) results of electric vertical takeoff and landing (eVTOL) geometries using the SU2 Reynolds-averaged Navier-Stokes (RANS) solver. Geometries were generated based on the Smart Transportation Infrastructure Initiative (STII) Rappor 15th iteration with various rotor-installment solutions. It was found that although open rotors installed on an underwing pylon were superior to shrouded rotors installed in a canoe, the canoe configuration would provide more potential for improvement, and using a canoe door to cover the first rotor opening woul
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Engblom, John J., and Ozden O. Ochoa. Nonlinear Dynamic Responses of Composite Rotor Blades. Fort Belvoir, VA: Defense Technical Information Center, August 1988. http://dx.doi.org/10.21236/ada200145.

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Vande Vate, John H., John J. Bartholdi, and III. Static and Dynamic Balance of Rotor Stacks. Fort Belvoir, VA: Defense Technical Information Center, April 1995. http://dx.doi.org/10.21236/ada299409.

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Bartholdi III, John J., and John H. Vande Vate. Static and Dynamic Balance of Rotor Stacks. Fort Belvoir, VA: Defense Technical Information Center, February 1998. http://dx.doi.org/10.21236/ada340085.

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Watson, Kevin, Jason Cormey, Narayanan Komerath, and James DiOttavio. Diagnostics of 3D Dynamic Stall on Rotor Blades. Fort Belvoir, VA: Defense Technical Information Center, June 2008. http://dx.doi.org/10.21236/ada499703.

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Shabana, Ahmed A. A New Non-Incremental Finite Element Solution Procedure for Rotor Dynamics. Fort Belvoir, VA: Defense Technical Information Center, November 2005. http://dx.doi.org/10.21236/ada440805.

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Sokolov, Volodymyr, Oleg Krol, Oksana Stepanova, and Petko Tsankov. Dynamic Characteristics of Rotary Motion Electrohydraulic Drive with Volume Regulation. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, May 2020. http://dx.doi.org/10.7546/crabs.2020.05.12.

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8

Srinivasan, Ganapathi R. A Free-Wake Euler and Navier-Stokes CFD Method and its Application to Helicopter Rotors Including Dynamic Stall. Fort Belvoir, VA: Defense Technical Information Center, November 1993. http://dx.doi.org/10.21236/ada278000.

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9

Chaplin, Harvey R. Some Dynamic Properties of a Rigid Two-Bladed Fully Gimballed Rotor with Teetering Feedback. Fort Belvoir, VA: Defense Technical Information Center, July 1986. http://dx.doi.org/10.21236/ada194946.

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Gillard, William J. Innovative Control Effectors (Configuration 101) Dynamic Wind Tunnel Test Report. Rotary Balance and Forced Oscillation Tests. Fort Belvoir, VA: Defense Technical Information Center, July 1998. http://dx.doi.org/10.21236/ada362903.

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