Two-dimensional modelling of the ice accretion process on transmission line wires and conductors

2006 ◽  
Vol 46 (2) ◽  
pp. 132-146 ◽  
Author(s):  
Ping Fu ◽  
Masoud Farzaneh ◽  
Gilles Bouchard
Keyword(s):  
Transmission Line ◽  
Two Dimensional ◽  
Ice Accretion ◽  
Accretion Process

Simulation of the ice accretion process on a transmission line cable with differential twisting

2007 ◽  
Vol 34 (2) ◽  
pp. 147-155 ◽  
Author(s):  
Ping Fu ◽  
Masoud Farzaneh
Keyword(s):  
Transmission Line ◽  
Computer Modelling ◽  
Air Pressure ◽  
Ice Accretion ◽  
Validity And Reliability ◽  
Overhead Transmission Line ◽  
Accretion Process ◽  
Ice Loads ◽  
Modelling Methods ◽  
Modelling Simulation

Cable rotation caused by ice accretion was specifically modelled and simulated for this paper. Both ice loads and wind-on-ice loads were taken into account during the modelling, and the quantity for the wind-on-ice loads was obtained by integrating air pressure and air shear along the airflow boundary. Air pressure and air shear were both evaluated through time-dependent airflow computations. Two types of overhead transmission line cables, namely, the Bersimis cable and an overhead ground wire, were examined using the new model, and a number of conclusions were drawn. The validity and reliability of the modelling methods were confirmed by comparing the simulation results with those obtained from experimental measurements.Key words: airflow computation, cable rotation, ice accretion, computer modelling, simulation.

scholarly journals Field and Circuit Models for the Wound Foil Inductor

1976 ◽  
Vol 3 (2) ◽  
pp. 97-102
Author(s):  
P. N. Murgatroyd
Keyword(s):  
Field Theory ◽  
Electromagnetic Field ◽  
Transmission Line ◽  
Field Analysis ◽  
Distributed Parameter ◽  
Two Dimensional ◽  
Lumped Model ◽  
Electromagnetic Field Theory ◽  
Lumped Equivalent Circuit ◽  
The Relationship

The Wound Foil Inductor is an important example of inductive components with appreciable internal capacitance. It is examined from three viewpoints – electromagnetic field theory, distributed-parameter (or transmission-line), and lumped equivalent circuit. The analyses are compared, particularly in terms of phase gradients within a component, and the relationship between a two-dimensional field analysis and the now established lumped model is derived.

Acoustic Characterization of Glaze and Rime Ice Structures on an Oscillating Airfoil via Fully Unsteady Simulations

2020 ◽  
Vol 65 (4) ◽  
pp. 1-12
Author(s):  
Myles Morelli ◽  
Beckett Y. Zhou ◽  
Alberto Guardone
Keyword(s):  
Wind Tunnel ◽  
Computational Modeling ◽  
Low Cost ◽  
Two Dimensional ◽  
Ice Accretion ◽  
Experimental Database ◽  
Acoustic Characterization ◽  
Ice Detection ◽  
Detection Technologies

The development of low-cost and simple technologies to improve pilot awareness of icing environments is crucial to improve the safety of rotorcraft, and especially those with limited icing clearance which are admittedly operating within icing environments without full icing clearance. An acoustic characterization of glaze and rime ice structures is hereby introduced to begin to quantify different ice shape noise signatures which directly transcend from the iced performance characteristics to develop acoustic ice detection technologies. The feasibility of the detection technique is assessed for fully unsteady simulations of ice accretion on an oscillating, two-dimensional airfoil. This work focuses on the computational modeling of the experimental database of a rotor airfoil with pitching motion during icing conditions from the NASA Glenn Icing Research Wind Tunnel and computing the resultant noise signals and analyzing their topology.

Nonlinear Two-Dimensional Transmission Line Models for Electrochemically Driven Conducting Polymer Actuators

2017 ◽  
Vol 22 (2) ◽  
pp. 705-716 ◽  
Author(s):  
Meisam Farajollahi ◽  
Ashwin Usgaocar ◽  
Yuta Dobashi ◽  
Vincent Woehling ◽  
Cedric Plesse ◽  
...  
Keyword(s):  
Transmission Line ◽  
Conducting Polymer ◽  
Two Dimensional ◽  
Polymer Actuators ◽  
Transmission Line Models
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