Numerical simulation on the aerodynamic force of the iced conductor for different angles of attack
Keywords:galloping aerodynamic force, iced conductor, vortex shedding, Den Hartog mechanism, O.Nigol mechanism
AbstractAccording to the galloping mechanism of iced conductors, the aerodynamic simulations were performed based on actual wind tunnel tests. Aeroelastic models of single and bundled conductors with a typical ice-coating section forms (crescent section) were set up. The simulation results were in good agreements with wind tunnel tests, and it showed that numerical simulation method can be used instead of wind tunnel tests. The wind attack angles have seriously affected the aerodynamic force of the iced conductor. The wake of vortex shedding for the iced single conductor was analyzed. As for the iced bundled conductors, sub-conductors at the downstream were seriously influenced by the ones at the upstream locations and the aerodynamic force of the sub-conductors at the downstream was lower than of those at the upstream. The negative slope of Nigol coefficient to the bundled conductors was larger than that of the single wire, but the absolute value of the amplitude was less than that of the single conductor, and the bundled conductors were more likely to gallop than the single ones. The Den. Hartog and O.Nigol mechanism were used to predict galloping of iced conductors, which can be convenient for analyzing vibration of iced conductors.
Copyright 2022 by Faculty of Engineering University of Rijeka, Faculty of Civil Engineering University of Rijeka. All rights reserved. This material may not be reproduced or copied, in whole or in part, in any printed, mechanical, electronic, film, or other distribution and storage media without the written consent of the publisher.
The journal Engineering Review’s publishing procedure is performed in accordance with the publishing ethics statements, defined within the Publishing Ethics Resource Kit. The Ethics statement is available in the document Ethics Policies.