Abstract
A theory is developed for unsteady flow of liquid metal in a de MHD flow regulator channel for small magnetic Reynolds numbers. It is shown that it is possible to use the quasistationary approximation for calculating the integral flow parameters. MHD methods, along with their applications in direct transformation of thermal energy into electrical energy, in recent years have been ever more widely used in nuclear energy and metallurgy for transporting and for measuring the parameters of liquid metal flows [1, 2]. Complete sealing, operation over a wide temperature range, and simplicity of control and automation are among the unquestionable advantages of all MHD devices. The existing theory of MHD devices is limited primarily to the stationary regimes of operation of electromagnetic pumps and magnetic flow-meters. The most characteristic operating regimes for the MHD regulator are the transient regimes, which are defined primarily by the hydrodynamics of the liquid metal flow. The present article is devoted to the study of the unsteady flow of liquid metal in the channel of a dc MHD flow regulator with independent excitation. The magnetic Reynolds are low (R m =σμU 0 b≪1).
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