Double-supply-frequency pressure pulsation in annular linear induction pump Part I: Measurement and numerical analysis

This paper describes an experimental and analytical study of double-supply- frequency pressure pulsation arising in an annular linear induction pump. I n a large-scale induction pump, it is known that the supply frequency shoul d be relatively low in order to satisfy a magnetohydrodynamic stability cri terion. Under such a low supply frequency, however, double-supply-frequency pressure and flow rare pulsation generated in an induction pump may be of concern. The experimental data obtained in the present work shows that the amplitude of the pressure pulsation increases with decreasing supply freque ncy, number of poles and/or slip. The numerical result reveals that the pre ssure pulsation comes from a disturbance of the electromagnetic force near the stator ends. (C) 2000 Elsevier Science S.A. All rights reserved.