Hideo Araseki

Double-supply-frequency pressure pulsation in annular linear induction pump, part II: reduction of pulsation by linear winding grading at both stator ends

In the previous work, the authors showed that the double-supply-frequency pressure pulsation comes from a disturbance of the electromagnetic force occurring near the stator ends, and hence the pressure pulsation may be reduced by some way that suppresses this disturbance, e.g. by a winding grading at the stator ends. In the present work, an experiment and a numerical analysis are carried out to verify the effect of linear winding grading. The experimental data and the numerical results show that this type of grading is an effective way to reduce the pressure pulsation. In addition, the experimental data reveals that the linear winding grading improves the pump efficiency.

Numerical method for analysis of turbulent liquid metal magnetohydrodynamic flow

Abstract This paper describes a numerical method for analyzing turbulent liquid metal magnetohydrodynamic flow in a rectangular duct under a transverse magnetic field. The main features of the proposed method are as follows: (1) a new iterative solution procedure is implemented to satisfy the conservation law for the electric current density; (2) Buleevs turbulence model is employed to calculate the turbulent intensities and shear stresses. The iterative solution procedure is tested and its ability is illustrated through solution of an example problem that corresponds to Hartmanns theoretical work. In order to verify the applicability of the turbulence model, the present method is applied to an analysis of Reed and Lykoudiss experimental data. The obtained numerical results agree well with the experimental data except for some slight differences.

FINITE ELEMENT METHOD FOR THERMAL HYDRAULIC ANALYSIS USING EQUAL-ORDER INTERPOLATION

This paper describes numerical procedures of a new finite element method for thermal hydraulic analysis using equal-order velocity-pressure interpolation. The main feature of the proposed method lies in applying particular numerical schemes to the pressure gradient terms in the momentum conservation equations and the mass balance terms in the pressure equation for the sake of strong coupling of velocity and pressure fields. Some numerical results show the basic potential of the proposed method.

Erratum to “Double-supply-frequency pressure pulsation in annular linear induction pump Part 1: Measurement and numerical analysis”: [Nucl. Eng. Des. 195 (2000) 85–100]

This paper describes an experimental and analytical study of double-supply-frequency pressure pulsation arising in an annular linear induction pump. In a large-scale induction pump, it is known that the supply frequency should be relatively low in order to satisfy a magnetohydrodynamic stability criterion. Under such a low supply frequency, however, double-supply-frequency pressure and flow rate 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 frequency, number of poles and/or slip. The numerical result reveals that the pressure pulsation comes from a disturbance of the electromagnetic force near the stator ends.Erratum Erratum to ‘‘Double-supply-frequency pressure pulsation in annular linear induction pump Part I: Measurement and numerical analysis’’ [Nucl. Eng. Des. 195 (2000) 85–100] Hideo Araseki *, Igor R. Kirillov , Gennady V. Preslitsky , Anatoly P. Ogorodnikov b a Central Research Institute of Electric Power Industry, 1646 Abiko, Abiko-shi, Chiba-ken 270-1194, Japan b STC ‘Sintez’, D. V. Efremo6 Institute of Electrophysical Apparatus, St. Petersburg 189631, Russia