Results 71 to 80 of about 4,437,500 (186)

Implementation of a trim routine in a rotor model for the numerical simulation of helicopter flow-fields

, 2006
Includes bibliographical references (p. 82-83)The aim of the current project is to develop, validate and implement a trim routine for a numerical rotor model, developed for the use in simulations of a helicopter exterior flow-field. In this investigation
Naidoo, Vaneshen
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Detection and Diagnosis of Broken Rotor Bar Based on the Analysis of Signals from a Variable Speed Drive

In this paper, the diagnosis of broken rotor bar (BRB) is investigated analytically and experimentally based on induction motors (IM) with variable speed drives (VSD).
Gu, Fengshou, Ball, Andrew, Lane, Mark, Ashari, Djoni   +3 more
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Interactional aerodynamics and acoustics of a hingeless coaxial helicopter with an auxiliary propeller in forward flight [PDF]

, 2008
The aerodynamics and acoustics of a generic coaxial helicopter with a stiff main rotor system and a tail- mounted propulsor are investigated using Brown's Vorticity Transport Model.
Brown, R.E., Kenyon, A.R., Kim, Hyo Wan, Kenyon, Adam R., Duraisamy, K., Kim, H.W., Duraisamy, Karthikeyan, Brown, Richard   +7 more
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Application of optimization algorithms in the design of a superconducting A.C. generator rotor [PDF]

, 1990
The superconducting a.c. generator is expected to be the optimum choice among a.c. generation systems in future because of its reduced size, high efficiency, high terminal voltage and its contribution to the stability of the power system.
Safi, Sabah K.
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Development of a rotor model for the numerical simulation of helicopter exterior flow-fields

, 2004
Includes bibliographical references (leaves 84-85).A numerical methodology is developed to model the effect of a rotor on the surrounding flow-field. The model calculates the time-averaged aerodynamic forces exerted on the air by the fan blades within ...
Hotchkiss, Paul
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The Detection of Shaft Misalignments using Motor Current Signals from a Sensorless Variable Speed Drive

, 2014
Shaft misalignments are common problems in rotating machines which cause additional dynamic and static loads, and vibrations in the system, leading to early damages and energy loss.
Gu, Fengshou, Ball, Andrew, Fengshou Gu, Samieh Abusaad, Benghozzi, Ahmed, Ahmed Benghozzi, Ann Smith, Andrew Ball, Abusaad, Samieh, Smith, Ann   +9 more
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Model Development and Stability Analysis for a Turbocharger Rotor System under Multi-Field Coupled Forces

Automotive turbochargers have been widely applied in vehicles in order to increase the power output of internal combustion engines by increasing the air to fuel ratio entering the piston cylinders.
Zhang, Hao
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A contra-rotating marine current turbine on a flexible mooring : development of a scaled prototype

, 2008
The contra-rotating marine current turbine concept developed by the Energy Systems Research Unit at the University of Strathclyde is aimed at extracting energy in a wide range of water depths by 'flying' a neutrally-buoyant device from a flexible ...
Clarke, Joseph Andrew, Clarke, Joe, Grant, Andrew, Ordonez Sanchez, Stephanie, Connor, Gary, Johnstone, Cameron, Ordonez Sanchez, Stephanie Eugenia   +6 more
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Interactional aerodynamics and acoustics of a propeller-augmented compound coaxial helicopter

, 2008
The aerodynamic and acoustic characteristics of a generic hingeless coaxial helicopter with a tail-mounted propulsor and stabiliser have been simulated using Brown's Vorticity Transport Model.
Kim, Hyo Wan, Kenyon, Adam R., Duraisamy, Karthikeyan, Brown, Richard   +3 more
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Optical wireless data transfer for rotor detection and diagnostics [PDF]

A special application of optical wireless data transfer, namely on-line monitoring and diagnostic of rotors in turbines and engines, has been considered in this thesis. In this application, to maintain line of sight, i.e.
Huang, Peng, Ph.D.
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