Skoči na glavni sadržaj

Izvorni znanstveni članak

Numerical simulation on the aerodynamic force of the iced conductor for different angles of attack

Yuejun Liu ; School of civil Engineering, Harbin Institute of technology, Harbin, Heilongjiang province, China
Ai Ping Tang ; School of civil Engineering, Harbin Institute of technology, Harbin, Heilongjiang province, China
Ke Tong Liu ; School of civil Engineering, Harbin Institute of technology, Harbin, Heilongjiang province, China
Jie Wen Tu ; School of civil Engineering, Harbin Institute of technology, Harbin, Heilongjiang province, China


Puni tekst: engleski PDF 1.280 Kb

str. 157-169

preuzimanja: 603

citiraj


Sažetak

According 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.

Ključne riječi

galloping aerodynamic force, iced conductor, vortex shedding, Den Hartog mechanism, O.Nigol mechanism

Hrčak ID:

139381

URI

https://hrcak.srce.hr/139381

Posjeta: 849 *