Stalling instability of annular linear induction pumps

L. Goldsteins¹ - L. Buligins¹ - Y. Fautrelle²

¹ Institute of Physics, University of Latvia, 32 Miera str., LV-2169 Salaspils, Latvia
² Grenoble INP, SIMAP/EPM Laboratory, Domaine Universitaire, BP 38402, Saint Martin d'Hères, France

Abstract
In this paper, we analyze stalling instability in the ideal annular linear electromagnetic induction pump (ALIP) coupled with a generalized external load as a power function of the flowrate. It is shown that the stalling threshold in terms of the magnetic Reynolds number Rm will strongly differ depending on the nature of the hydraulic load. It is elucidated why stalling instability can play a key role as a transition phenomenon from stable regime to MHD instability in industrial ALIPs with a sufficiently large Rm. Figs 6, Refs 13.