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A real gas model for numerical flow analysis in a high-voltage SF6 circuit breaker

DOI: 10.1615/ICHMT.2015.THMT-15.1720
pages 767-770

B. Bosovic
Faculty of Mechanical Engineering, University of Sarajevo, Vilsonovo setaliste 9, 71000 Sarajevo, Bosnia and Herzegovina

D. Beslija
Faculty of Electrical Engineering, University of Sarajevo, Zmaja od Bosne bb, 71000 Sarajevo, Bosnia and Herzegovina

M. H. Kim
Faculty of Electrical Engineering, University of Sarajevo, Zmaja od Bosne bb, 71000 Sarajevo, Bosnia and Herzegovina

M. Torlak
Faculty of Mechanical Engineering, University of Sarajevo, Vilsonovo šetalište 9, 71000 Sarajevo, Bosnia and Herzegovina

E. Dzaferovic
Faculty of Mechanical Engineering, University of Sarajevo, Vilsonovo šetalište 9, 71000 Sarajevo, Bosnia and Herzegovina

M. Kapetanovic
Faculty of Electrical Engineering, University of Sarajevo, Zmaja od Bosne bb, 71000 Sarajevo, Bosnia and Herzegovina

Résumé

A real gas model of SF6 was implemented for numerical analysis of flow in SF6 high-voltage circuit breaker. The model was used in simulations of unsteady flow of SF6 gas through the nozzles of high-voltage circuit breakers for rated voltage of 420 kV after the current zero instant for 20 ms arcing time. The computer program for simulation of high-voltage circuit breakers, based on a simplified integral model, was used to simulate the interrupting process up to the current zero and 1 ms after. It's were used to calculate the boundary conditions for unsteady gas flow simulations in a CFD code and subsequent analyses and comparisons.

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