Rotors
Mostrando 1-12 de 56 artigos, teses e dissertações.
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1. Design, development, and implementation of 3D-printed polylactic acid centrifuge rotors for laboratory-scale applications
In this work, self-made laboratory centrifuge equipment was developed for the separation of suspensions and immiscible liquids. This centrifuge was based on the Arduino microcontroller and fabricated from simple and recycled mechanical and electronic parts, spending an inexpensive budget suitably. The centrifuge frame and rotors were manufactured of Polylact
Química Nova. Publicado em: 2022
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2. EXPERIMENTAL AND NUMERICAL ANALYSIS OF CHAOTIC ADVECTION AS AN EFFICIENT APPROACH TO MAXIMIZE HOMOGENEOUS LAMINAR MIXING IN A BATCH MIXER
Abstract In the present work, the impacts of effective parameters on the mixing of Stokes flows in a chaotic batch mixer are numerically and experimentally studied. The batch mixer consists of a container and two circular rotors where the rotors can rotate independently. To investigate the possibility of improving the mixing, the effect of non-constant speed
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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3. Rheological characteristics PBAT/organoclay compounds
Abstract The rheological behavior of poly (butylene adipate-co-terephthalate) (PBAT) and its composites prepared with three different organoclays was investigated. Composites containing up to 7.5%, w/w organoclay, were prepared by two routes: (a) direct melt blending in an internal laboratory mixer with high intensity rotors and (b) concentrates (prepared in
REM, Int. Eng. J.. Publicado em: 2019-06
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4. Sensitivity Analysis of Flexible Rotor Subjected to Interval Uncertainties
Abstract This paper aims at analyzing the sensitivity of the structural response of flexible rotors subjected to uncertain interval parameters. The interval approach encompasses both an uncertainty and sensitivity analyses. The uncertainty analysis consists in computing the interval uncertain structural responses by using the global optimization method. The
Lat. Am. j. solids struct.. Publicado em: 13/05/2019
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5. Magnetic topology with axial flux concentration: a technique to improve permanent-magnet motor performance
Abstract This article presents a different topology for the magnetic circuit of permanent-magnet motors, using the concept of Axial Flux Concentration. By means of longitudinal extension of the rotor length beyond the stator core, a substantial increase in the flux per pole is enabled, improving the general performance of the machine. Even in low cost motors
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-12
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6. Performance and Wake Analysis of Rotors in Axial Flight Using Computational Fluid Dynamics
ABSTRACT: Flow field around rotors in axial flight is known to be complex especially in steep descent where the rotor is operating inside its own wake. It is often reported that, in this flight condition, the rotor is susceptible to severe wake interactions causing unsteady blade load, severe vibration, loss of performance, as well as poor control and handli
J. Aerosp. Technol. Manag.. Publicado em: 2017-06
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7. Magnetic Gearing Electromagnetic Concepts
Abstract In this paper the magnetic geared machines electromagnetic concepts are introduced. The magnetic gear modulation mechanism which becomes possible rotors of different polarities produce torque is explained, through the use analytical expressions and plots obtained by finite elements method. This pedagogical approach is a way to teach the subject in a
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-03
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8. Uncertainty analysis of flexible rotors considering fuzzy parameters and fuzzy-random parameters
Abstract The components of flexible rotors are subjected to uncertainties. The main sources of uncertainties include the variation of mechanical properties. This contribution aims at analyzing the dynamics of flexible rotors under uncertain parameters modeled as fuzzy and fuzzy random variables. The uncertainty analysis encompasses the modeling of uncertain
Lat. Am. j. solids struct.. Publicado em: 2015-10
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9. Desenvolvimento de um modelo termohidrodinâmico para análise em mancais segmentados / Development of a thermohydrodynamic model for analysis in tilting pad journal bearings
Este trabalho tem por objetivo analisar o comportamento termohidrodinâmico de mancais hidrodinâmicos segmentados e avaliar a influência da temperatura nas características dinâmicas (coeficiente equivalente de rigidez e de amortecimento) desses mancais. Por esse motivo, foi desenvolvido um modelo termohidrodinâmico para análise em mancais segmentados,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2012
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10. Estudo da degradação energética em tubulações industriais
At REGAP, boiler feed water with high pressure is delivered from pumps 121-P- 01A/B/C/D, located at Utilities Unit, for various utilities clients within the refinery: boilers F-121-01A/B/ C, boilers 103-E-01, the steam generator 209-V-03 and furnace 52-F-01A/B. These customers are spread over a vast area and have a range of demands of pressure. To be able to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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11. Detection and analysis of rotor faults in induction motors by the measurement of the stray magnetic flux
This paper presents measured data and electromagnetic FEM field calculations as techniques for detecting and analyzing eccentricity in three-phase induction motors. Also it presents experimental results for detecting broken bars in induction motor rotors. A search-coil is used as magnetic field sensor to measure the stray magnetic flux outside the motor. It
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2012-06
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12. Stochastic modeling of flexible rotors
Flexible rotors are characterized by inherent uncertainties affecting the parameters that influence the dynamic responses of the system. In this context, the handling of variability in rotor dynamics is a natural and necessary extension of the modeling capability of the existing techniques of deterministic analysis. Among the various methods used to model un
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012