Electromagnetic method for detection of gas bubbles in two phase liquid metals flows

O. Andreewa, T. Gundruma, T. Wondraka, S. Eckerta, G. Gerbetha, B. Dekdoukb A.

Peytonb

aHelmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, P.O. Box 510119, 01314 Dresden, Germany

bSchool of Electrical and Electronic Engineering, The University of Manchester, Manchester, M13 9PL, UK

Abstract

We present a combined numerical and experimental investigation of an electromagnetic system dedicated for an operative detection of non-metallic enclosures (gas bubbles) into the liquid metal flows. The method is based on the generation of eddy currents in the electrically conducting medium by applying AC magnetic field and the detection of the electromagnetic distortions caused by heterogeneity of electrical conductivity of the medium. We defined an optimal position and configuration of detector and excitation coil in order to get maximal sensitivity of the system to the spatial distribution of admixture.

Keywords: two-phase flow; electromagnetic tomography; gas bubbles.