Results 301 to 310 of about 1,727,830 (339)
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Pre-swirl Stator and Propeller/Stator Efficiency
Day 1 Tue, September 17, 1991, 1991A new method for improving the propeller efficiency due to locating a pre-swirl stator array has been developed by applying linearized lifting surface theory. This method has been applied on general stators and in particular stators of low aspect ratio. The obtained results of the stator 1nduced velocity are in exact agreement with the low aspect ratio
M. M. Gaafary, M. M. Mosaad
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Convective condensation in a stator–rotor–stator spinning disc reactor
AIChE Journal, 2016Centrifugal intensification of condensation heat transfer in the rotor–stator cavities of a stator–rotor–stator spinning disc reactor (srs‐SDR) is studied, as a function of rotational velocity ω, volumetric throughflow rate , and average temperature driving force .
de Beer, M.M. +3 more
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Rotor–stator devices: The role of shear and the stator
Chemical Engineering Research and Design, 2012High shear rotor-stator mixers are widely used in process industries including the manufacture of many food, cosmetic, pharmaceutical, and health care products. Many of these products involve emulsification where the drop size distribution affects the processing and the product properties.
Rodgers, T. L., Cooke, M.
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Analysis of Stator-Stator Clocking in a Transonic Turbine
Volume 6: Turbo Expo 2007, Parts A and B, 2007Clocking, i.e. the relative pitch-wise positioning between two successive vanes with the same amount of airfoils, has been demonstrated to bring potential aero-thermal benefits in several recent studies. Indeed, across a vane pitch, a variation of both time-averaged and time-resolved quantities is induced. In order to advance the knowledge on clocking,
N. Billiard +3 more
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2013 66th Annual Conference for Protective Relay Engineers, 2013
When considering protection for the generator stator, the engineer must balance the expense of applying a particular relay or relay system against the consequences of losing a generator. The total loss of a generator may not be catastrophic if it represents a small percentage of the investment in an installation.
Johnny Simms, Suparat Pavavicharn
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When considering protection for the generator stator, the engineer must balance the expense of applying a particular relay or relay system against the consequences of losing a generator. The total loss of a generator may not be catastrophic if it represents a small percentage of the investment in an installation.
Johnny Simms, Suparat Pavavicharn
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IEEE Industry Applications Magazine, 1998
Partial discharge tests can determine which motor and generator stator windings are experiencing insulation problems. A deteriorated winding has a PD activity which can be 30 times or more higher than a winding in good condition. This great difference in PD activity enables even nonspecialized maintenance personnel to identify the few motors or ...
Greg Stone, Joe Kapler
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Partial discharge tests can determine which motor and generator stator windings are experiencing insulation problems. A deteriorated winding has a PD activity which can be 30 times or more higher than a winding in good condition. This great difference in PD activity enables even nonspecialized maintenance personnel to identify the few motors or ...
Greg Stone, Joe Kapler
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Failure analysis of general stator and uniform wall thickness stator
Engineering Failure Analysis, 2018Abstract Stator lining of positive displacement motor (PDM) is prone to generate thermal fatigue failure because of viscoelastic hysteresis of the rubber material. Based on the thermo-mechanical coupling modeling and rubber material testing, finite element method was used to study the effect of environment temperature and thermo-viscoelastic ...
Changshuai Shi +3 more
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2016
The chapter deals with stator winding faults. Assessments of different types of stator winding fault are discussed in this chapter. Both steady-state and transient current-based diagnosis are covered. Sequence component-based stator fault diagnosis is presented. Park plane is sometime used for fault diagnosis.
Subrata Karmakar +3 more
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The chapter deals with stator winding faults. Assessments of different types of stator winding fault are discussed in this chapter. Both steady-state and transient current-based diagnosis are covered. Sequence component-based stator fault diagnosis is presented. Park plane is sometime used for fault diagnosis.
Subrata Karmakar +3 more
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Partitioned Stator Flux Reversal Machine With Consequent-Pole PM Stator
IEEE Transactions on Energy Conversion, 2015In this paper, partitioned stator flux reversal permanent magnet (PS-FRPM) machines having different stator/rotor pole combinations with consequent-pole PM (CPM) stator are proposed and analyzed. Compared with the conventional 12-stator-pole PS-FRPM machines having 10-, 11-, 13-, and 14-rotor-pole rotors and surface-mounted PM (SPM) stator, the PM ...
Z. Z. Wu, Z. Q. Zhu
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Time-Space Spectral Method for Rotor–Rotor/Stator–Stator Interactions
Journal of Turbomachinery, 2019AbstractThe paper presents a time-space spectral method for an efficient analysis of rotor–rotor/stator–stator interactions in the framework of the time spectral form harmonic balance method. The method treats time and space harmonics in a coherent way and allows for easy choice of time and passage through the introduction of pseudo-shaft frequency and
Xiuquan Huang, Ding Xi Wang
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