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Artykuły w czasopismach na temat „Simulations rotor/stator”

Autor: Grafiati

Data publikacji: 30 listopada 2024

Data aktualizacji: 31 lipca 2025

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1

Tang, Jing, Jie Chen, Kan Dong, Yongheng Yang, Haichen Lv, and Zhigang Liu. "Modeling and Evaluation of Stator and Rotor Faults for Induction Motors." Energies 13, no. 1 (2019): 133. http://dx.doi.org/10.3390/en13010133.

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The modeling of stator and rotor faults is the basis of the development of online monitoring techniques. To obtain reliable stator and rotor fault models, this paper focuses on dynamic modeling of the stator and rotor faults in real-time, which adopts a multiple-coupled-circuit method by using a winding function approach for inductance calculation. Firstly, the model of the induction machine with a healthy cage is introduced, where a rotor mesh that consists of a few rotor loops and an end ring loop is considered. Then, the stator inter-turn fault model is presented by adding an extra branch w

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2

Karanayil, Baburaj, Muhammed Fazlur Rahman, and Colin Grantham. "Identification of Induction Motor Parameters in Industrial Drives with Artificial Neural Networks." Advances in Fuzzy Systems 2009 (2009): 1–10. http://dx.doi.org/10.1155/2009/241809.

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This paper presents a new method of online estimation of the stator and rotor resistance of the induction motor in the indirect vector-controlled drive, with artificial neural networks. The back propagation algorithm is used for training of the neural networks. The error between the rotor flux linkages based on a neural network model and a voltage model is back propagated to adjust the weights of the neural network model for the rotor resistance estimation. For the stator resistance estimation, the error between the measured stator current and the estimated stator current using neural network

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3

Reinmo¨ller, U., B. Stephan, S. Schmidt, and R. Niehuis. "Clocking Effects in a 1.5 Stage Axial Turbine—Steady and Unsteady Experimental Investigations Supported by Numerical Simulations." Journal of Turbomachinery 124, no. 1 (2001): 52–60. http://dx.doi.org/10.1115/1.1425811.

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The interaction between rotor and stator airfoils in a multistage turbomachine causes an inherently unsteady flow field. In addition, different relative circumferential positions of several stator rows and rotor rows, respectively, have an influence on the flow behavior in terms of loss generation, energy transport and secondary flow. The objective of the presented study is to investigate the effects of stator airfoil clocking on the performance of a 1-1/2 stage axial cold air turbine. The investigated axial turbine consists of two identical stators. The low aspect ratio of the blades and thei

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4

Xu, Jieqiong, Qunhong Li, and Shimin Wang. "Impulsive Control of the Rotor-Stator Rub Based on Phase Characteristic." Abstract and Applied Analysis 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/495747.

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An impulsive control method is proposed to eliminate the rotor-stator rubbing based on the phase characteristic. The relation between the vibration energy and the phase difference suggests the starting point for controlling the rotor-stator rubbing by implementing impulse. When the contact between the rotor and the stator occurs, the impulse is implemented inx-direction andy-direction several times to avoid the rotor-stator rubbing. The practical feasibility of this approach is investigated by numerical simulations.

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5

Wang, Ziwei, Xiong Jiang, Ti Chen, Yan Hao, and Min Qiu. "Numerical simulation of transonic compressor under circumferential inlet distortion and rotor/stator interference using harmonic balance method." Modern Physics Letters B 32, no. 12n13 (2018): 1840021. http://dx.doi.org/10.1142/s0217984918400213.

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Simulating the unsteady flow of compressor under circumferential inlet distortion and rotor/stator interference would need full-annulus grid with a dual time method. This process is time consuming and needs a large amount of computational resources. Harmonic balance method simulates the unsteady flow in compressor on single passage grid with a series of steady simulations. This will largely increase the computational efficiency in comparison with the dual time method. However, most simulations with harmonic balance method are conducted on the flow under either circumferential inlet distortion

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6

Akwa, J. V., and A. P. Petry. "STATORS USE INFLUENCE ON THE PERFORMANCE OF A SAVONIUS WIND ROTOR USING COMPUTATIONAL FLUID DYNAMICS." Revista de Engenharia Térmica 10, no. 1-2 (2011): 63. http://dx.doi.org/10.5380/reterm.v10i1-2.61965.

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This paper aims at verifying the influence of using five kinds of stators in the averaged moment and power coefficients of a Savonius wind rotor using computational fluid dynamics (CFD). The analyzed stators have cylindrical shape with two and three openings, one and four deflector blades and walls shaped like a wings. The equations of continuity, Reynolds Averaged Navier-Stokes – RANS and the Eddy Viscosity Model k-ω SST, in its Low-Reynolds approaches, with hybrid near wall treatment; are numerically solved using the commercial software Star-CCM+, based on Finite Volume Method, resulting in

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7

Rai, M. M., and N. K. Madavan. "Multi-Airfoil Navier–Stokes Simulations of Turbine Rotor–Stator Interaction." Journal of Turbomachinery 112, no. 3 (1990): 377–84. http://dx.doi.org/10.1115/1.2927670.

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An accurate numerical analysis of the flows associated with rotor–stator configurations in turbomachinery can be extremely helpful in optimizing the performance of turbomachinery. In this study the unsteady, thin-layer, Navier–Stokes equations in two spatial dimensions are solved on a system of patched and overlaid grids for an axial-turbine rotor–stator configuration. The governing equations are solved using a finite-difference, upwind algorithm that is set in an iterative, implicit framework. Results are presented in the form of pressure contours, time-averaged pressures, unsteady pressures,

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8

Brandão, André, Aline Souza de Paula, Marcelo Amorim Savi, and Fabrice Thouverez. "Nonlinear Dynamics and Chaos of a Nonsmooth Rotor-Stator System." Mathematical Problems in Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/8478951.

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Rotor systems have wide applications in industries, including aero engines, turbo generators, and gas turbines. Critical behaviors promoted by the system unbalance and the contact between rotor and stator lead to important nonlinearities on system dynamics. This paper investigates the complex behavior presented by a rotor-stator system’s dynamics due to intermittent contact. A four-degree-of-freedom Jeffcott nonsmooth rotor/stator system is used to describe the rotor behavior, while a viscoelastic suspended rigid cylinder represents the stator. Numerical simulations are carried out showing ric

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9

Gaetani, Paolo, and Giacomo Persico. "Influence of the Rotor-Driven Perturbation on the Stator-Exit Flow within a High-Pressure Gas Turbine Stage." International Journal of Turbomachinery, Propulsion and Power 6, no. 3 (2021): 28. http://dx.doi.org/10.3390/ijtpp6030028.

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In stator–rotor interaction studies on axial turbines, the attention is commonly focused on the unsteady rotor aerodynamics resulting from the periodic perturbations induced by the stator flow structures. Conversely, less interest has been historically attracted regarding the influence of the rotor on the flow released by the stator, correlated to propagation of the blade potential field upstream of the rotor leading edge. In this paper, experiments in the research high-pressure turbine of the Laboratory of Fluid-Machines of the Politecnico di Milano, performed by applying a fast-response aero

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10

Ahriche, Aimad. "An Approach of Position and Torque Estimation for Induction Motor based Sensor-less Drive." International Journal of Circuits, Systems and Signal Processing 17 (March 6, 2023): 44–49. http://dx.doi.org/10.46300/9106.2023.17.5.

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This paper presents a new approach with stability analysis, simulation and experimental investigation of a sliding mode based estimator for rotor-position and torque-load calculation in high performance speed-sensor-less AC motor drive. The proposed algorithm is built based on the induction motor (IM) fluxes equations for two rotationg referential frames. The First equation calculates the stator flux vector while the second gives the rotor flux vector. Moreover, the stator flux equation is linked to a stator-flux rotating referential frame and the rotor flux equation is linked to a rotor-flux

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11

Valkov, T. V., and C. S. Tan. "Effect of Upstream Rotor Vortical Disturbances on the Time-Averaged Performance of Axial Compressor Stators: Part 1—Framework of Technical Approach and Wake–Stator Blade Interactions." Journal of Turbomachinery 121, no. 3 (1999): 377–86. http://dx.doi.org/10.1115/1.2841330.

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In a two-part paper, key computed results from a set of first-of-a-kind numerical simulations on the unsteady interaction of axial compressor stators with upstream rotor wakes and tip leakage vortices are employed to elucidate their impact on the time-averaged performance of the stator. Detailed interrogation of the computed flow field showed that for both wakes and tip leakage vortices, the impact of these mechanisms can be described on the same physical basis. Specifically, there are two generic mechanisms with significant influence on performance: reversible recovery of the energy in the wa

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12

Hembera, M., H. P. Kau, and E. Johann. "Simulation of Casing Treatments of a Transonic Compressor Stage." International Journal of Rotating Machinery 2008 (2008): 1–10. http://dx.doi.org/10.1155/2008/657202.

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This article presents the study of casing treatments on an axial compressor stage for improving stability and enhancing stall margin. So far, many simulations of casing treatments on single rotor or rotor-stator configurations were performed. But as the application of casing treatments in engines will be in a multistage compressor, in this study, the axial slots are applied to a typical transonic first stage of a high-pressure 4.5-stage compressor including an upstream IGV, rotor, and stator. The unsteady simulations are performed with a three-dimensional time accurate Favre-averaged Navier-st

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13

Ayas, Mehmet, Jan Skocilas, and Tomas Jirout. "Analysis of Power Input of an In-Line Rotor-Stator Mixer for Viscoplastic Fluids." Processes 8, no. 8 (2020): 916. http://dx.doi.org/10.3390/pr8080916.

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In this work, the power draw and shear profile of a novel in-line rotor-stator mixer were studied experimentally and the laminar flow regime was simulated. The power draw of the rotor-stator mixer was investigated experimentally using viscoplastic shear-thinning fluid and the results of the obtained power consumptions were verified through simulations. The power draw constant and Otto-Metzner coefficient were determined from the result of experimental data and through simulations. A new method is suggested for the determination of the Otto-Metzner coefficient for the Herschel–Bulkley model and

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14

Fernandez Oro, Jesús Manuel, Andrés Meana-Fernández, Monica Galdo Vega, Bruno Pereiras, and José González Pérez. "LES-based simulation of the time-resolved flow for rotor-stator interactions in axial fan stages." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 2 (2019): 657–81. http://dx.doi.org/10.1108/hff-10-2017-0421.

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Purpose The purpose of this paper is the development of a CFD methodology based on LES computations to analyze the rotor–stator interaction in an axial fan stage. Design/methodology/approach A wall-modeled large eddy simulation (WMLES) has been performed for a spanwise 3D extrusion of the central section of the fan stage. Computations were performed for three different operating conditions, from nominal (Q_N) to off-design (85 per cent Q_N and 70 per cent Q_N) working points. Circumferential periodic conditions were introduced to reduce the extent of the computational domain. The post-processi

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15

Benbouzid, Mohamed, Abdelkrim Benchaib, Gang Yao, Brice Beltran, and Olivier Chocron. "A Metric Observer for Induction Motors Control." Journal of Control Science and Engineering 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/3631254.

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This paper deals with metric observer application for induction motors. Firstly, assuming that stator currents and speed are measured, a metric observer is designed to estimate the rotor fluxes. Secondly, assuming that only stator currents are measured, another metric observer is derived to estimate rotor fluxes and speed. The proposed observer validity is checked throughout simulations on a 4 kW induction motor drive.

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16

Xiang, Yunwen, Zhiqiang Liao, Defeng Kong, and Baozhu Jia. "Analysis of the Effect of the Skewed Rotor on Induction Motor Vibration." Electronics 14, no. 12 (2025): 2374. https://doi.org/10.3390/electronics14122374.

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Induction motors have a simple structure, have low manufacturing costs and are widely used. However, various vibration effects with mechanical or electromagnetic origins are also very common. To analyze the impact of rotor skewing on electromagnetic vibrations in induction motors, this paper investigated the skew factor of skewed rotor slots and proposes an electromagnetic force wave analysis method. The method aimed to optimize the skew angle parameters for vibration amplitude reduction, with its effectiveness verified through simulations and experiments. Taking a 7.5 kW four-pole induction m

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17

Nguyen, Manh-Dung, Tae-Seong Kim, Kyung-Hun Shin, Gang-Hyeon Jang, and Jang-Young Choi. "Fast Prediction of Characteristics in Wound Rotor Synchronous Condenser Using Subdomain Modeling." Mathematics 12, no. 22 (2024): 3526. http://dx.doi.org/10.3390/math12223526.

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Wound rotor synchronous condensers (WRSCs) are DC-excited rotor machines that utilize rotor winding instead of permanent magnets. Their voltage regulator controls the rotor field to generate or absorb reactive power, thereby regulating grid voltage or improving power factor. A key characteristic of a WRSC is the compounding curve, which shows the required rotor current under specific stator current and voltage conditions. This paper presents an approach for quickly calculating the electromagnetic parameters of a WRSC using a mathematical method. After determining magnetic flux density, induced

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18

Jiang, Jun. "The Analytical Solution and The Existence Condition of Dry Friction Backward Whirl in Rotor-to-Stator Contact Systems." Journal of Vibration and Acoustics 129, no. 2 (2006): 260–64. http://dx.doi.org/10.1115/1.2345677.

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Dry friction backward whirl is a self-excited vibration state in rotor-to-stator contact systems, by which the rotor is in continuous contact with the stator, slipping continuously on the contact surface and whirling backward at a supersynchronous frequency. To correctly cope the response of dry friction backward whirl, the effect of dry friction must be taken into account in rotor/stator models. From the knowledge on the characteristics of dry friction backward whirl, the whirl frequency, the existence condition and the solution of this response are derived analytically in this paper. The ana

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19

Childs, Dara W., and Avijit Bhattacharya. "Prediction of Dry-Friction Whirl and Whip Between a Rotor and a Stator." Journal of Vibration and Acoustics 129, no. 3 (2007): 355–62. http://dx.doi.org/10.1115/1.2731412.

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This paper addresses recent test results for dry-friction whip and whirl. Authors of these publications suggest that predictions from Black’s 1968 paper (J. Mech. Eng. Sci., 10(1), pp. 1–12) are deficient in predicting their observed transition speeds from whirl to whip and the associated precession frequencies of whirl and whip motion. Predictions from Black’s simple Jeffcott-rotor/point-mass stator are cited. This model is extended here to a multimode rotor and stator model with an arbitrary axial location for rotor-stator rubbing. Predictions obtained from this new model are quite close to

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20

Haghgooei, Peyman, Ehsan Jamshidpour, Adrien Corne, et al. "A Parameter-Free Method for Estimating the Stator Resistance of a Wound Rotor Synchronous Machine." World Electric Vehicle Journal 14, no. 3 (2023): 65. http://dx.doi.org/10.3390/wevj14030065.

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This paper presents a new online method based on low frequency signal injection to estimate the stator resistance of a Wound Rotor Synchronous Machine (WRSM). The proposed estimator provides a parameter-free method for estimating the stator resistance, in which there is no need to know the values of the parameters of the machine model, such as the stator and rotor inductances or the rotor flux linkage. In this method, a low frequency sinusoidal current is injected in the d axis of the stator current to produce a sinusoidal flux in the stator. In this paper, it is shown that the phase differenc

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21

Niu, Han, Jiang Chen, and Hang Xiang. "A New Influence Mechanism of Clocking Effect in Subsonic Compressor." Applied Sciences 13, no. 18 (2023): 10094. http://dx.doi.org/10.3390/app131810094.

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This paper investigates the clocking effect in subsonic compressor element stages and the influence of design parameters on the flow mechanism. We focus on the relationship between the wake-induced separation loss and wake mixing loss and the unsteady mechanism in the wake flow process without considering the transition through several steady and unsteady numerical simulations aimed at a series of subsonic compressor element stages. The simulation results indicate that the performance difference at various indexing positions depends on the relationship between wake mixing loss and wake-induced

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22

Setty Allampalli, Ravikumar, PurnaPrajna R. Mangsuli, and Kishore Chatterjee. "Novel Compensation Method to Reduce Rotor Position Estimation Error and Torque Reduction in Signal Injection Based PMSM Drives." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 2 (2017): 548. http://dx.doi.org/10.11591/ijpeds.v8.i2.pp548-557.

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High frequency signal injection techniques are widely used to extract rotor position information from low speed to stand still. Accuracy of estimated rotor position is decreased when stator winding resistance is neglected. Position estimation error also results in output Torque reduction. Parasitic resistance of stator winding causes significant position estimation error <br /> and Torque reduction, if not compensated. Signal injection techniques developed in the literature does not provide detailed analysis and compensation methods to improve rotor position estimation of PMS Motors, whe

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23

Hao, Z., X. Yang, and Z. Feng. "Unsteady simulations of migration and deposition of fly-ash particles in the first-stage turbine of an aero-engine." Aeronautical Journal 125, no. 1291 (2021): 1566–86. http://dx.doi.org/10.1017/aer.2021.27.

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AbstractParticulate deposits in aero-engine turbines change the profile of blades, increase the blade surface roughness and block internal cooling channels and film cooling holes, which generally leads to the degradation of aerodynamic and cooling performance. To reveal particle deposition effects in the turbine, unsteady simulations were performed by investigating the migration patterns and deposition characteristics of the particle contaminant in a one-stage, high-pressure turbine of an aero-engine. Two typical operating conditions of the aero-engine, i.e. high-temperature take-off and econo

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24

Hösgen, Thomas, Matthias Meinke, and Wolfgang Schröder. "Large-Eddy Simulations of Rim Seal Flow in a One-Stage Axial Turbine." Journal of the Global Power and Propulsion Society 4 (December 23, 2020): 309–21. http://dx.doi.org/10.33737/jgpps/129704.

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The flow field in a one-stage axial flow turbine with 30 stator and 62 rotor blades including the wheel space is investigated by large-eddy simulation (LES). The Navier-Stokes equations are solved using a massively parallel finite-volume solver based on a Cartesian mesh with immersed boundaries. The strict conservation of mass, momentum, and energy is ensured by an efficient cut-cell/level-set ansatz, where a separate level-set solver describes the motion of the rotor. Both solvers use individual subsets of a shared Cartesian mesh, which they can adapt independently. The focus of the analysis

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25

Zhou, Yucheng, Wenyong Duan, Haiyu Liu, et al. "An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump." Journal of Marine Science and Engineering 13, no. 1 (2025): 138. https://doi.org/10.3390/jmse13010138.

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This study delves into rotor–stator interaction within a bidirectional bulb tubular pump under cavitation conditions. Using pressure pulsation tests on a model pump and numerical simulations performed with ANSYS CFX software, we analyzed pressure pulsation and flow field data across three distinct flow rates and multiple cavitation numbers. Both time-domain and frequency-domain analyses were conducted to examine the patterns of pressure pulsation influenced by flow rates and cavitation numbers at various monitoring locations. A numerical flow field analysis further validated the findings. The

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26

Kruchinina, Irina Yu, Yuvenaliy Khozikov, Alexandr Liubimtsev, and Valentina Paltceva. "Harmonic losses in high-speed PM synchronous machines." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 3 (2017): 683–91. http://dx.doi.org/10.1108/compel-09-2016-0401.

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Purpose The purpose of this paper is the development of a new numerical method for the calculation of the air-gap magnetic flux harmonics in synchronous machines with permanent magnet (PM) excitation. The harmonic analysis results are used as input data for the eddy-current loss calculation and for the rotor heating evaluation. Design/methodology/approach The method is based on the finite element analysis (FEA). The model takes into account toothed stator design, rotor asymmetrical magnetic reluctance and saturation. At first, a series of static DC magnetic (magnetostatic) simulations is run.

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27

Goldman, P., and A. Muszynska. "Chaotic Behavior of Rotor/Stator Systems With Rubs." Journal of Engineering for Gas Turbines and Power 116, no. 3 (1994): 692–701. http://dx.doi.org/10.1115/1.2906875.

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This paper outlines the dynamic behavior of externally excited rotor/stator systems with occasional, partial rubbing conditions. The observed phenomena have one major source of a strong nonlinearity: transition from no contact to contact state between mechanical elements, one of which is rotating, resulting in variable stiffness and damping, impacting, and intermittent involvement of friction. A new model for such a transition (impact) is developed. In case of the contact between rotating and stationary elements, it correlates the local radial and tangential (“super ball”) effects with global

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28

Papagiannis, Ilias, Asad Raheem, Altug Basol, et al. "Unsteady flow mechanisms in the last stage of a transonic low pressure steam turbine—multistage effects and tip leakage flows." Journal of the Global Power and Propulsion Society 1 (July 20, 2017): F4IW8S. http://dx.doi.org/10.22261/f4iw8s.

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Abstract In this paper, an unsteady investigation of the last two stages of a low-pressure steam turbine with supersonic airfoils near the tip of the last stage’s rotor blade is presented. Goal is the investigation of multistage effects and tip leakage flow in the last stage of the turbine and to provide insight on the stator-rotor flow interaction in the presence of a bow-shock wave. This study is unique in a sense of combining experimental data for code validation and comparison with a numerical simulation of the last two stages of a real steam turbine, including tip-cavity paths and seals,

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29

Chaluvadi, V. S. P., A. I. Kalfas, and H. P. Hodson. "Vortex Transport and Blade Interactions in High Pressure Turbines." Journal of Turbomachinery 126, no. 3 (2004): 395–405. http://dx.doi.org/10.1115/1.1773849.

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This paper presents a study of the three-dimensional flow field within the blade rows of a high-pressure axial flow steam turbine stage. Half-delta wings were fixed to a rotating hub to simulate an upstream rotor passage vortex. The flow field is investigated in a low-speed research turbine using pneumatic and hot-wire probes downstream of the blade row. The paper examines the impact of the delta wing vortex transport on the performance of the downstream blade row. Steady and unsteady numerical simulations were performed using structured three-dimensional Navier-Stokes solver to further unders

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30

Huang, Yi, and Clemens Gühmann. "Wireless Sensor Network for Temperatures Estimation in an Asynchronous Machine Using a Kalman Filter." ACTA IMEKO 7, no. 1 (2018): 5. http://dx.doi.org/10.21014/acta_imeko.v7i1.509.

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<p class="Abstract">A 4<sup>th</sup>-order Kalman filter (KF) algorithm is developed based on the thermal model of an asynchronous machine. The thermal parameters are identified and KF is implemented in a wireless sensor network (WSN) to estimate the temperatures of the stator windings, the rotor cage, and the stator core of an asynchronous machine. The rotor speed, coolant air temperature, and the effective current and voltage are acquired by a WTIM (wireless transducer interface module) separately and transmitted to a NCAP (network capable application processor) where the K

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31

Oumar, Aichetoune, Yarba Ahmed, and Mohamed Cherkaoui. "Operating of DSIM without Current and Speed Sensors Controlled by ADRC Control." Mathematical Problems in Engineering 2022 (August 1, 2022): 1–8. http://dx.doi.org/10.1155/2022/9033780.

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This paper presents an operation of the double start induction machine (DSIM) without current and speed sensors controlled by active disturbance rejection control (ADRC). The operation of the machine, without current and speed sensors, is an economic and simple method. The main advantages of this method are the reconstruction of stator current phases and rotor speed using only one DC voltage. The method is very simple and effective. It is based on the information provided by a DC voltage and the switching states of the converters to reconstruct the stator voltages. After we use two voltages ob

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32

Wang, Chunze, Rui Feng, Yao Chu, Qing Tan, Chaoyang Xing, and Fei Tang. "Simulations of the Rotor-Stator-Cavity Flow in Liquid-Floating Rotor Micro Gyroscope." Micromachines 14, no. 4 (2023): 793. http://dx.doi.org/10.3390/mi14040793.

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When rotating at a high speed in a microscale flow field in confined spaces, rotors are subject to a complex flow due to the joint effect of the centrifugal force, hindering of the stationary cavity and the scale effect. In this paper, a rotor-stator-cavity (RSC) microscale flow field simulation model of liquid-floating rotor micro gyroscopes is built, which can be used to study the flow characteristics of fluids in confined spaces with different Reynolds numbers (Re) and gap-to-diameter ratios. The Reynolds stress model (RSM) is applied to solve the Reynolds averaged Navier–Stokes equation fo

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33

Wei, Wen Xiang, and Xiao Ping Zhang. "Flux and Speed Estimation Based on the Extended State Observer for Speed Sensorless Control of Indirect Field Oriented Induction Motor Drives." Applied Mechanics and Materials 273 (January 2013): 414–18. http://dx.doi.org/10.4028/www.scientific.net/amm.273.414.

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A flux observer based on the extended state observer (ESO) is proposed for rotor flux estimation and speed identification of indirect field oriented induction motor drives system. The uncertain component including rotor resistance and speed in the stator current equation is extended to a new state, the ESO is then constructed. By the current estimate error, the uncertain component convergences to its actual value and the accurate rotor flux, speed and the rotor time constant are obtained. The accuracy of the ESO independent the rotor resistance and load torque variations, simulations under hig

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Tannous, Mikhael, Patrice Cartraud, Mohamed Torkhani, and David Dureisseix. "Assessment of 3D modeling for rotor–stator contact simulations." Journal of Sound and Vibration 353 (September 2015): 327–43. http://dx.doi.org/10.1016/j.jsv.2015.05.025.

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Montiel, Miguel, and Roque Corral. "Time-Inclined Method for High-Fidelity Rotor/Stator Simulations." Aerospace 10, no. 5 (2023): 475. http://dx.doi.org/10.3390/aerospace10050475.

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The application of the time-inclined method in a fourth-order unstructured flux-reconstruction code for turbomachinery is demonstrated. Inviscid and viscous unsteady results due to the interaction of an incoming gust of total pressure with a linear cascade of flat plates and a linear cascade of T106A low-pressure turbine airfoils are reported. The agreement between the time-inclined method and the equivalent full-annulus multipassage solution is very high for both cases. Viscous solutions at Reynolds numbers of 104 and 105 were conducted. A high degree of matching was obtained between the time

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36

Jurdana, Vedran, Neven Bulic, and Wolfgang Gruber. "Topology Choice and Optimization of a Bearingless Flux-Switching Motor with a Combined Winding Set." Machines 6, no. 4 (2018): 57. http://dx.doi.org/10.3390/machines6040057.

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The purpose of this paper is to choose a new topology for bearingless flux-switching slice motors, regarding the number of stator and rotor poles, with a combined winding set. Additionally, the selected motor topology is optimized with finite element method (FEM) simulations to improve the performance. Bearingless slice drives feature a magnetically-suspended rotor disk passively stabilized by reluctance forces due to a permanent magnet (PM) bias flux in the air gap and actively controlled by the generation of radial bearing forces and motor torque. Usage of the combined winding set, where eac

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37

Qin, Denghui, Qiaogao Huang, Guang Pan, Liming Chao, Yang Luo, and Peng Han. "Effect of the odd and even number of blades on the hydrodynamic performance of a pre-swirl pumpjet propulsor." Physics of Fluids 34, no. 3 (2022): 035120. http://dx.doi.org/10.1063/5.0080661.

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A numerical study based on detached eddy simulations is conducted to investigate the effects of the odd and even number of rotor/stator blades, that is, nr/ ns, on the hydrodynamic performance of a pre-swirl pumpjet propulsor (PJP). In this paper, six PJPs, the PJP 6-4 ( ns– nr), 8-6, 10-8, 7-5, 9-7, and 11-9, are created. The hydrodynamic performance, the unsteady force of blades, and the wake structure of the PJPs are compared. The results show that the frequency of the fluctuating force of the whole rotor highly depends on the number or, more specifically, the parity of nr. When the paramet

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Carta, Mario, Shahrokh Shahpar, Tiziano Ghisu, and Fabio Licheri. "Multi-Fidelity Modelling of the Effect of Combustor Traverse on High-Pressure Turbine Temperatures." Aerospace 11, no. 9 (2024): 750. http://dx.doi.org/10.3390/aerospace11090750.

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As turbine entry temperatures of modern jet engines continue to increase, additional thermal stresses are introduced onto the high-pressure turbine rotors, which are already burdened by substantial levels of centrifugal and gas loads. Usually, for modern turbofan engines, the temperature distribution upstream of the high-pressure stator is characterized by a series of high-temperature regions, determined by the circumferential arrangement of the combustor burners. The position of these high-temperature regions, both radially and circumferentially in relation to the high-pressure stator arrange

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39

Sun, Peng, Wenguang Fu, Hong Wang, and Jingjun Zhong. "Numerical research on inlet total pressure distortion in a transonic compressor with non-axisymmetric stator." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 2 (2017): 667–78. http://dx.doi.org/10.1177/0954410017740385.

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The adverse impacts of non-uniform inlet flow have been the focus for several decades with the increase of the operating range of engines. A deep understanding of the flow mechanism of distortion passing through a compressor is needed urgently and the improvement of the compressor performance becomes more and more important. In this paper, a non-axisymmetric stator is presented with significant non-axisymmetric characteristics in a transonic compressor to investigate compressor performance and flow field effects. A time-dependent three-dimensional Reynolds-averaged Navier-Stokes equation compo

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40

Valkov, T. V., and C. S. Tan. "Effect of Upstream Rotor Vortical Disturbances on the Time-Averaged Performance of Axial Compressor Stators: Part 2—Rotor Tip Vortex/Streamwise Vortex–Stator Blade Interactions." Journal of Turbomachinery 121, no. 3 (1999): 387–97. http://dx.doi.org/10.1115/1.2841331.

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In a two-part paper, key computed results from a set of first-of-a-kind numerical simulations on the unsteady interaction of axial compressor stator with upstream rotor wakes and tip leakage vortices are employed to elucidate their impact on the time-averaged performance of the stator. Detailed interrogation of the computed flowfield showed that for both wakes and tip leakage vortices, the impact of these mechanisms can be described on the same physical basis. Specifically, there are two generic mechanisms with significant influence on performance: reversible recovery of the energy in the wake

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41

Ballestín-Bernad, Víctor, Guillermo Sanz-Sánchez, Jesús Sergio Artal-Sevil, and José Antonio Domínguez-Navarro. "Analytical Modeling of an Ironless Axial Flux Machine for Sizing Purposes." Electronics 14, no. 14 (2025): 2901. https://doi.org/10.3390/electronics14142901.

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This paper presents a novel analytical model of a double-stator single-rotor (DSSR) ironless axial flux machine (IAFM), with no iron either in the rotor or in the stator, that has cylindrical magnets in the rotor. The model is based on sizing equations that include the peak no-load flux density as a determining parameter, and then static simulations using the finite element method show that the 3D magnetic field created by cylindrical magnets can be generally fitted with an empirical function. The analytical model is validated throughout this work with finite element simulations and experiment

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42

Zhang, Guochen, Tianyi Gao, Zhihui Xu, Pengcheng Liu, and Chengfeng Zhang. "Influences of slotted blade on performance and flow structure of a transonic axial compressor." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 235, no. 6 (2021): 1344–54. http://dx.doi.org/10.1177/0957650921994382.

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Main reason of compressor instability is boundary layer separation on the surface of blades. As one of flow control methods of the compressor, slotted blade has attracted many researchers’ attention because of its simple geometric structure and remarkable flow control effect. In order to evaluate its availability in the compressor, a type of convergent slot is designed to implement in a single-stage transonic axial compressor. Three configurations, i.e. rotor slot, stator slot and rotor-stator combined slot, are introduced to study the aerodynamic performance of compressor by numerical simulat

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Wellborn, S. R., and T. H. Okiishi. "The Influence of Shrouded Stator Cavity Flows on Multistage Compressor Performance." Journal of Turbomachinery 121, no. 3 (1999): 486–97. http://dx.doi.org/10.1115/1.2841341.

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Experiments were performed on a low-speed multistage axial-flow compressor to assess the effects of shrouded stator cavity flows on aerodynamic performance. Five configurations, which involved systematic changes in seal-tooth leakage rates and/or elimination of the shrouded stator cavities, were tested. Rig data indicate increasing seal-tooth leakage substantially degraded compressor performance. For every 1 percent increase in seal-tooth clearance-to-span ratio, the decrease in pressure rise was 3 percent and the reduction in efficiency was 1 point. These observed performance penalties are co

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Krishtop, Ihor, Victor German, Alexander Gusak, Svitlana Lugova, and Alexey Kochevsky. "Numerical Approach for Simulation of Fluid Flow in Torque Flow Pumps." Applied Mechanics and Materials 630 (September 2014): 43–51. http://dx.doi.org/10.4028/www.scientific.net/amm.630.43.

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Torque flow pumps are widely used for pumping of fluids with high content of solid and fibrous inclusions and gas bubbles, in particular, for pumping of sewage and wastes. Fluid flow in these pumps is featured with strong vortex patterns, making it difficult to predict reliably their performance curves numerically. The paper is devoted to selection of a numerical approach for simulation of fluid flow in a torque flow pump of “Turo” type and its influence on simulation results. In particular, influence of geometrical configuration of the rotor-stator interface as well as numerical grid fineness

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45

El-Mongy, Heba Hamed, Tamer Ahmed El-Sayed, Vahid Vaziri, and Marian Wiercigroch. "Nonlinear Dynamics of Whirling Rotor with Asymmetrically Supported Snubber Ring." Machines 12, no. 12 (2024): 897. https://doi.org/10.3390/machines12120897.

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Rotor–stator whirling is a critical malfunction frequently encountered in rotating machinery, often resulting in severe damages. This study investigates the nonlinear dynamics of a whirling rotor interacting with a snubber ring through numerical simulations that account for the stiffness asymmetries of the snubber ring. A two-degrees-of-freedom (DOF) model is employed to analyse the contact interactions that occurred between the rotor and the snubber ring, assuming a linear elastic contact model. The analysis also incorporates the static offset between the centers of the rotor and the snubber

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46

Lugaresi, Marco, Diego Villa, and Stefano Gaggero. "Design by Optimization on the Nozzle and the Stator Blades of a Rim-Driven Pumpjet." Journal of Marine Science and Engineering 12, no. 11 (2024): 2090. http://dx.doi.org/10.3390/jmse12112090.

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The design of the stator and nozzle of a rim-driven pumpjet thruster (RDPJ) is addressed through a simulation-based design optimization approach built on a parametric description of the main geometrical characteristics of the system, a RANS solver with actuator disk model, and a genetic algorithm. As the propeller blades’ geometry is fixed, the rotor/stator (RDPJ-R/S) configuration is considered for the optimal design from a multi-objective optimization process aimed at minimizing the resistance keeping the cavitation inception index at the lowest possible value. Steady-state (moving reference

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47

Mankbadi, Reda R. "A Study of Unsteady Rotor–Stator Interactions." Journal of Turbomachinery 111, no. 4 (1989): 394–400. http://dx.doi.org/10.1115/1.3262286.

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This work is concerned with simulations of rotor-generated unsteady response of the turbulent flow in a stator. The rotor’s effect is represented by moving cylinders of equivalent drag coefficient that produce passing wakes at the entrance of the stator. The unsteady incompressible Navier–Stokes equations are solved on a staggered grid and eddy viscosities are obtained using a k–ε model. The rotor-generated wakes were found to produce a pressure field at the stator’s entrance that increases in the direction of the wake traverse. At a streamwise distance equal to the distance between the stator

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Yang, Yuanjia, Man Gao, and Zhenxiong Zhou. "Enhanced Control Strategies for Improving Low Fault Ride-Through Capability of Grid-Connected Doubly Fed Induction Wind Turbines." Energies 18, no. 4 (2025): 767. https://doi.org/10.3390/en18040767.

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The DFIG faces challenges in providing fast and accurate support during grid voltage fluctuations. Severe voltage dips can trigger peak currents, which may damage the converter equipment and even lead to the disconnection of turbines from the grid. This paper deeply analyzes the transient characteristics of stator flux dynamics under voltage dips and identifies the transient component of the rotor-induced EMF as the primary cause of rotor overcurrent. To address this issue, an improved control strategy is proposed that utilizes stator current as a rotor voltage compensation method to effective

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Wang, Zhuo, Lin Du, and Xiaofeng Sun. "Enhancement of Rotor Loading and Suppression of Stator Separation through Reduction of the Blade–Row Gap." International Journal of Turbomachinery, Propulsion and Power 8, no. 1 (2023): 6. http://dx.doi.org/10.3390/ijtpp8010006.

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An immersed boundary (IB) method is applied to study the effect of the blade–row gap in a low-speed single-stage compressor. The advantage of using an IB method is that the rotor/stator interface can be eliminated and, thus, the blade–row interaction can be considered at an extremely small gap. The IB method was modified to internal-flow problems, and the adaptive mesh refinement (AMR) technique, together with a wall model, used to facilitate the simulations for high Reynolds-number flows. The results showed that both the pressure rise and the efficiency were observed to be higher in the small

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Guo, Chen. "A Spherical Planning Based Electrifying Strategy of Permanent Magnet Spherical Motor." Applied Mechanics and Materials 741 (March 2015): 629–45. http://dx.doi.org/10.4028/www.scientific.net/amm.741.629.

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Permanent Magnet SpherIcal Motor (PMSM) can be applIed on offshore O&M vessels for offshore wInd farms. An electrIfyIng strategy of PMSM Is proposed accordIng to the structure of PMSM wIth 3 layers of stator coIls. A statIc torque model of PMSM Is buIlt In thIs paper. In order to classIfy the statuses of rotor posItIon, spherIcal plannIng on stator spherIcal surface Is made and 4 classes of 72 sub-regIons are dIVIded accordIng to the dIstrIbutIon of stator coIls. Then stator coIls In each sub-regIon are marked wIth numbers and electrIfyIng rules of stator coIls In dIfferent statuses are de

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