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Power transmission through power cables installed in ventilated tunnels is increasingly used worldwide and offers a complex thermal environment. Established correlations currently in use have been deduced from a nonfully developed turbulent flow and the effect of the proximity to a tunnel wall is not accounted for. This paper details the experimental and numerical investigations conducted on a mock-up...
This paper deals with the experimental and numerical study of cooling effect in low-speed two-dimensional slot jet impinging on an isothermal vertical hot plate. The jet is discharged into a semi confined zone which is bounded with two parallel isothermal walls. Both top and bottom boundaries are open to the ambient air. The wall adjacent to the nozzle is kept at the same temperature of ambient whereas...
Operation regimes of modern power semiconductor devices (such as IGCT thyristors or IGBT transistors) are characterized by switching high currents of the order of kA at the voltage level of several kV. Although their internal and eventual contact resistances are very low, the Joule losses in them reach quite high values and corresponding heat may lead to unacceptable (local or global) temperature...
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